use dark play/gif button as overlay when image is mostly light

Daniel Gultsch created

Change summary

art/play_gif_black.svg                                              |    2 
art/play_gif_white.svg                                              |   68 
art/play_video_black.svg                                            |    2 
art/play_video_white.svg                                            |   59 
art/render.rb                                                       |    6 
src/main/java/eu/siacs/conversations/persistance/FileBackend.java   | 2154 
src/main/res/drawable-hdpi/date_bubble_grey.9.png                   |    0 
src/main/res/drawable-hdpi/date_bubble_white.9.png                  |    0 
src/main/res/drawable-hdpi/message_bubble_received.9.png            |    0 
src/main/res/drawable-hdpi/message_bubble_received_dark.9.png       |    0 
src/main/res/drawable-hdpi/message_bubble_received_grey.9.png       |    0 
src/main/res/drawable-hdpi/message_bubble_received_warning.9.png    |    0 
src/main/res/drawable-hdpi/message_bubble_received_white.9.png      |    0 
src/main/res/drawable-hdpi/message_bubble_sent.9.png                |    0 
src/main/res/drawable-hdpi/message_bubble_sent_grey.9.png           |    0 
src/main/res/drawable-hdpi/play_gif_black.png                       |    0 
src/main/res/drawable-hdpi/play_gif_white.png                       |    0 
src/main/res/drawable-hdpi/play_video_black.png                     |    0 
src/main/res/drawable-hdpi/play_video_white.png                     |    0 
src/main/res/drawable-mdpi/date_bubble_grey.9.png                   |    0 
src/main/res/drawable-mdpi/date_bubble_white.9.png                  |    0 
src/main/res/drawable-mdpi/message_bubble_received.9.png            |    0 
src/main/res/drawable-mdpi/message_bubble_received_dark.9.png       |    0 
src/main/res/drawable-mdpi/message_bubble_received_grey.9.png       |    0 
src/main/res/drawable-mdpi/message_bubble_received_warning.9.png    |    0 
src/main/res/drawable-mdpi/message_bubble_received_white.9.png      |    0 
src/main/res/drawable-mdpi/message_bubble_sent.9.png                |    0 
src/main/res/drawable-mdpi/message_bubble_sent_grey.9.png           |    0 
src/main/res/drawable-mdpi/play_gif_black.png                       |    0 
src/main/res/drawable-mdpi/play_gif_white.png                       |    0 
src/main/res/drawable-mdpi/play_video_black.png                     |    0 
src/main/res/drawable-mdpi/play_video_white.png                     |    0 
src/main/res/drawable-xhdpi/date_bubble_grey.9.png                  |    0 
src/main/res/drawable-xhdpi/date_bubble_white.9.png                 |    0 
src/main/res/drawable-xhdpi/message_bubble_received.9.png           |    0 
src/main/res/drawable-xhdpi/message_bubble_received_dark.9.png      |    0 
src/main/res/drawable-xhdpi/message_bubble_received_grey.9.png      |    0 
src/main/res/drawable-xhdpi/message_bubble_received_warning.9.png   |    0 
src/main/res/drawable-xhdpi/message_bubble_received_white.9.png     |    0 
src/main/res/drawable-xhdpi/message_bubble_sent.9.png               |    0 
src/main/res/drawable-xhdpi/message_bubble_sent_grey.9.png          |    0 
src/main/res/drawable-xhdpi/play_gif_black.png                      |    0 
src/main/res/drawable-xhdpi/play_gif_white.png                      |    0 
src/main/res/drawable-xhdpi/play_video_black.png                    |    0 
src/main/res/drawable-xhdpi/play_video_white.png                    |    0 
src/main/res/drawable-xxhdpi/date_bubble_grey.9.png                 |    0 
src/main/res/drawable-xxhdpi/date_bubble_white.9.png                |    0 
src/main/res/drawable-xxhdpi/message_bubble_received.9.png          |    0 
src/main/res/drawable-xxhdpi/message_bubble_received_dark.9.png     |    0 
src/main/res/drawable-xxhdpi/message_bubble_received_grey.9.png     |    0 
src/main/res/drawable-xxhdpi/message_bubble_received_warning.9.png  |    0 
src/main/res/drawable-xxhdpi/message_bubble_received_white.9.png    |    0 
src/main/res/drawable-xxhdpi/message_bubble_sent.9.png              |    0 
src/main/res/drawable-xxhdpi/message_bubble_sent_grey.9.png         |    0 
src/main/res/drawable-xxhdpi/play_gif_black.png                     |    0 
src/main/res/drawable-xxhdpi/play_gif_white.png                     |    0 
src/main/res/drawable-xxhdpi/play_video_black.png                   |    0 
src/main/res/drawable-xxhdpi/play_video_white.png                   |    0 
src/main/res/drawable-xxxhdpi/date_bubble_grey.9.png                |    0 
src/main/res/drawable-xxxhdpi/date_bubble_white.9.png               |    0 
src/main/res/drawable-xxxhdpi/message_bubble_received.9.png         |    0 
src/main/res/drawable-xxxhdpi/message_bubble_received_dark.9.png    |    0 
src/main/res/drawable-xxxhdpi/message_bubble_received_grey.9.png    |    0 
src/main/res/drawable-xxxhdpi/message_bubble_received_warning.9.png |    0 
src/main/res/drawable-xxxhdpi/message_bubble_received_white.9.png   |    0 
src/main/res/drawable-xxxhdpi/message_bubble_sent.9.png             |    0 
src/main/res/drawable-xxxhdpi/message_bubble_sent_grey.9.png        |    0 
src/main/res/drawable-xxxhdpi/play_gif_black.png                    |    0 
src/main/res/drawable-xxxhdpi/play_gif_white.png                    |    0 
src/main/res/drawable-xxxhdpi/play_video_black.png                  |    0 
src/main/res/drawable-xxxhdpi/play_video_white.png                  |    0 
71 files changed, 1,218 insertions(+), 1,073 deletions(-)

Detailed changes

art/play_gif.svg → art/play_gif_black.svg 🔗

@@ -64,5 +64,5 @@
      d="M11.5 9H13v6h-1.5zM9 9H6c-.6 0-1 .5-1 1v4c0 .5.4 1 1 1h3c.6 0 1-.5 1-1v-2H8.5v1.5h-2v-3H10V10c0-.5-.4-1-1-1zm10 1.5V9h-4.5v6H16v-2h2v-1.5h-2v-1z"
      clip-path="url(#b)"
      id="path10"
-     style="fill:#ffffff;fill-opacity:0.7019608" />
+     style="fill:#000000;fill-opacity:0.54" />
 </svg>

art/play_gif_white.svg 🔗

@@ -0,0 +1,68 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="24"
+   height="24"
+   viewBox="0 0 24 24"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.91 r13725"
+   sodipodi:docname="play_gif.svg">
+  <metadata
+     id="metadata14">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1920"
+     inkscape:window-height="1200"
+     id="namedview12"
+     showgrid="false"
+     inkscape:zoom="9.8333333"
+     inkscape:cx="1.5762712"
+     inkscape:cy="11.084746"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="0"
+     inkscape:current-layer="svg2" />
+  <defs
+     id="defs4">
+    <path
+       id="a"
+       d="M24 24H0V0h24v24z" />
+  </defs>
+  <clipPath
+     id="b">
+    <use
+       xlink:href="#a"
+       overflow="visible"
+       id="use8" />
+  </clipPath>
+  <path
+     d="M11.5 9H13v6h-1.5zM9 9H6c-.6 0-1 .5-1 1v4c0 .5.4 1 1 1h3c.6 0 1-.5 1-1v-2H8.5v1.5h-2v-3H10V10c0-.5-.4-1-1-1zm10 1.5V9h-4.5v6H16v-2h2v-1.5h-2v-1z"
+     clip-path="url(#b)"
+     id="path10"
+     style="fill:#ffffff;fill-opacity:0.70" />
+</svg>

art/play_video.svg → art/play_video_black.svg 🔗

@@ -55,5 +55,5 @@
   <path
      d="M20 33l12-9-12-9v18zm4-29C12.95 4 4 12.95 4 24s8.95 20 20 20 20-8.95 20-20S35.05 4 24 4zm0 36c-8.82 0-16-7.18-16-16S15.18 8 24 8s16 7.18 16 16-7.18 16-16 16z"
      id="path6"
-     style="fill:#ffffff;fill-opacity:0.7019608;opacity:1;stroke:none;stroke-opacity:0.38039216" />
+     style="fill:#000000;fill-opacity:0.54;opacity:1;stroke:none;stroke-opacity:0.38039216" />
 </svg>

art/play_video_white.svg 🔗

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="48"
+   height="48"
+   viewBox="0 0 48 48"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.91 r13725"
+   sodipodi:docname="play_video.svg">
+  <metadata
+     id="metadata12">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs10" />
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
+     inkscape:pageopacity="0"
+     inkscape:pageshadow="2"
+     inkscape:window-width="1916"
+     inkscape:window-height="1156"
+     id="namedview8"
+     showgrid="false"
+     inkscape:zoom="4.9166667"
+     inkscape:cx="0.91525424"
+     inkscape:cy="24"
+     inkscape:window-x="0"
+     inkscape:window-y="20"
+     inkscape:window-maximized="0"
+     inkscape:current-layer="svg2" />
+  <path
+     d="M0 0h48v48H0z"
+     fill="none"
+     id="path4" />
+  <path
+     d="M20 33l12-9-12-9v18zm4-29C12.95 4 4 12.95 4 24s8.95 20 20 20 20-8.95 20-20S35.05 4 24 4zm0 36c-8.82 0-16-7.18-16-16S15.18 8 24 8s16 7.18 16 16-7.18 16-16 16z"
+     id="path6"
+     style="fill:#ffffff;fill-opacity:0.70;opacity:1;stroke:none;stroke-opacity:0.38039216" />
+</svg>

art/render.rb 🔗

@@ -18,8 +18,10 @@ images = {
     'ic_search_white.svg' => ['ic_search_background_white', 144],
     'ic_no_results_white.svg' => ['ic_no_results_background_white', 144],
     'ic_no_results_black.svg' => ['ic_no_results_background_black', 144],
-	'play_video.svg' => ['play_video', 128],
-	'play_gif.svg' => ['play_gif', 128],
+	'play_video_white.svg' => ['play_video_white', 128],
+	'play_gif_white.svg' => ['play_gif_white', 128],
+    'play_video_black.svg' => ['play_video_black', 128],
+    'play_gif_black.svg' => ['play_gif_black', 128],
 	'conversations_mono.svg' => ['ic_notification', 24],
 	'ic_received_indicator.svg' => ['ic_received_indicator', 12],
 	'ic_send_text_offline.svg' => ['ic_send_text_offline', 36],

src/main/java/eu/siacs/conversations/persistance/FileBackend.java 🔗

@@ -26,7 +26,6 @@ import android.util.Base64;
 import android.util.Base64OutputStream;
 import android.util.Log;
 import android.util.LruCache;
-import android.webkit.MimeTypeMap;
 
 import java.io.ByteArrayOutputStream;
 import java.io.Closeable;
@@ -44,7 +43,6 @@ import java.security.DigestOutputStream;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.text.SimpleDateFormat;
-import java.util.Arrays;
 import java.util.Date;
 import java.util.List;
 import java.util.Locale;
@@ -65,1071 +63,1089 @@ import eu.siacs.conversations.xmpp.pep.Avatar;
 
 public class FileBackend {
 
-	private static final Object THUMBNAIL_LOCK = new Object();
-
-	private static final SimpleDateFormat IMAGE_DATE_FORMAT = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US);
-
-	private static final String FILE_PROVIDER = ".files";
-
-	private XmppConnectionService mXmppConnectionService;
-
-	public FileBackend(XmppConnectionService service) {
-		this.mXmppConnectionService = service;
-	}
-
-	private static boolean isInDirectoryThatShouldNotBeScanned(Context context, File file) {
-		return isInDirectoryThatShouldNotBeScanned(context, file.getAbsolutePath());
-	}
-
-	public static boolean isInDirectoryThatShouldNotBeScanned(Context context, String path) {
-		for (String type : new String[]{RecordingActivity.STORAGE_DIRECTORY_TYPE_NAME, "Files"}) {
-			if (path.startsWith(getConversationsDirectory(context, type))) {
-				return true;
-			}
-		}
-		return false;
-	}
-
-	public static long getFileSize(Context context, Uri uri) {
-		try {
-			final Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
-			if (cursor != null && cursor.moveToFirst()) {
-				long size = cursor.getLong(cursor.getColumnIndex(OpenableColumns.SIZE));
-				cursor.close();
-				return size;
-			} else {
-				return -1;
-			}
-		} catch (Exception e) {
-			return -1;
-		}
-	}
-
-	public static boolean allFilesUnderSize(Context context, List<Uri> uris, long max) {
-		if (max <= 0) {
-			Log.d(Config.LOGTAG, "server did not report max file size for http upload");
-			return true; //exception to be compatible with HTTP Upload < v0.2
-		}
-		for (Uri uri : uris) {
-			String mime = context.getContentResolver().getType(uri);
-			if (mime != null && mime.startsWith("video/")) {
-				try {
-					Dimensions dimensions = FileBackend.getVideoDimensions(context, uri);
-					if (dimensions.getMin() > 720) {
-						Log.d(Config.LOGTAG, "do not consider video file with min width larger than 720 for size check");
-						continue;
-					}
-				} catch (NotAVideoFile notAVideoFile) {
-					//ignore and fall through
-				}
-			}
-			if (FileBackend.getFileSize(context, uri) > max) {
-				Log.d(Config.LOGTAG, "not all files are under " + max + " bytes. suggesting falling back to jingle");
-				return false;
-			}
-		}
-		return true;
-	}
-
-	public static String getConversationsDirectory(Context context, final String type) {
-		if (Config.ONLY_INTERNAL_STORAGE) {
-			return context.getFilesDir().getAbsolutePath() + "/" + type + "/";
-		} else {
-			return getAppMediaDirectory(context) + context.getString(R.string.app_name) + " " + type + "/";
-		}
-	}
-
-	public static String getAppMediaDirectory(Context context) {
-		return Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + context.getString(R.string.app_name) + "/Media/";
-	}
-
-	public static String getConversationsLogsDirectory() {
-		return Environment.getExternalStorageDirectory().getAbsolutePath() + "/Conversations/";
-	}
-
-	private static Bitmap rotate(Bitmap bitmap, int degree) {
-		if (degree == 0) {
-			return bitmap;
-		}
-		int w = bitmap.getWidth();
-		int h = bitmap.getHeight();
-		Matrix mtx = new Matrix();
-		mtx.postRotate(degree);
-		Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
-		if (bitmap != null && !bitmap.isRecycled()) {
-			bitmap.recycle();
-		}
-		return result;
-	}
-
-	public static boolean isPathBlacklisted(String path) {
-		final String androidDataPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Android/data/";
-		return path.startsWith(androidDataPath);
-	}
-
-	private static Paint createAntiAliasingPaint() {
-		Paint paint = new Paint();
-		paint.setAntiAlias(true);
-		paint.setFilterBitmap(true);
-		paint.setDither(true);
-		return paint;
-	}
-
-	private static String getTakePhotoPath() {
-		return Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) + "/Camera/";
-	}
-
-	public static Uri getUriForFile(Context context, File file) {
-		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N || Config.ONLY_INTERNAL_STORAGE) {
-			try {
-				return FileProvider.getUriForFile(context, getAuthority(context), file);
-			} catch (IllegalArgumentException e) {
-				if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
-					throw new SecurityException(e);
-				} else {
-					return Uri.fromFile(file);
-				}
-			}
-		} else {
-			return Uri.fromFile(file);
-		}
-	}
-
-	public static String getAuthority(Context context) {
-		return context.getPackageName() + FILE_PROVIDER;
-	}
-
-	private static boolean hasAlpha(final Bitmap bitmap) {
-		for (int x = 0; x < bitmap.getWidth(); ++x) {
-			for (int y = 0; y < bitmap.getWidth(); ++y) {
-				if (Color.alpha(bitmap.getPixel(x, y)) < 255) {
-					return true;
-				}
-			}
-		}
-		return false;
-	}
-
-	private static int calcSampleSize(File image, int size) {
-		BitmapFactory.Options options = new BitmapFactory.Options();
-		options.inJustDecodeBounds = true;
-		BitmapFactory.decodeFile(image.getAbsolutePath(), options);
-		return calcSampleSize(options, size);
-	}
-
-	private static int calcSampleSize(BitmapFactory.Options options, int size) {
-		int height = options.outHeight;
-		int width = options.outWidth;
-		int inSampleSize = 1;
-
-		if (height > size || width > size) {
-			int halfHeight = height / 2;
-			int halfWidth = width / 2;
-
-			while ((halfHeight / inSampleSize) > size
-					&& (halfWidth / inSampleSize) > size) {
-				inSampleSize *= 2;
-			}
-		}
-		return inSampleSize;
-	}
-
-	private static Dimensions getVideoDimensions(Context context, Uri uri) throws NotAVideoFile {
-		MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
-		try {
-			mediaMetadataRetriever.setDataSource(context, uri);
-		} catch (RuntimeException e) {
-			throw new NotAVideoFile(e);
-		}
-		return getVideoDimensions(mediaMetadataRetriever);
-	}
-
-	private static Dimensions getVideoDimensionsOfFrame(MediaMetadataRetriever mediaMetadataRetriever) {
-		Bitmap bitmap = null;
-		try {
-			bitmap = mediaMetadataRetriever.getFrameAtTime();
-			return new Dimensions(bitmap.getHeight(), bitmap.getWidth());
-		} catch (Exception e) {
-			return null;
-		} finally {
-			if (bitmap != null) {
-				bitmap.recycle();
-				;
-			}
-		}
-	}
-
-	private static Dimensions getVideoDimensions(MediaMetadataRetriever metadataRetriever) throws NotAVideoFile {
-		String hasVideo = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_HAS_VIDEO);
-		if (hasVideo == null) {
-			throw new NotAVideoFile();
-		}
-		Dimensions dimensions = getVideoDimensionsOfFrame(metadataRetriever);
-		if (dimensions != null) {
-			return dimensions;
-		}
-		int rotation = extractRotationFromMediaRetriever(metadataRetriever);
-		boolean rotated = rotation == 90 || rotation == 270;
-		int height;
-		try {
-			String h = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
-			height = Integer.parseInt(h);
-		} catch (Exception e) {
-			height = -1;
-		}
-		int width;
-		try {
-			String w = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
-			width = Integer.parseInt(w);
-		} catch (Exception e) {
-			width = -1;
-		}
-		metadataRetriever.release();
-		Log.d(Config.LOGTAG, "extracted video dims " + width + "x" + height);
-		return rotated ? new Dimensions(width, height) : new Dimensions(height, width);
-	}
-
-	private static int extractRotationFromMediaRetriever(MediaMetadataRetriever metadataRetriever) {
-		String r = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
-		try {
-			return Integer.parseInt(r);
-		} catch (Exception e) {
-			return 0;
-		}
-	}
-
-	public static void close(Closeable stream) {
-		if (stream != null) {
-			try {
-				stream.close();
-			} catch (IOException e) {
-			}
-		}
-	}
-
-	public static void close(Socket socket) {
-		if (socket != null) {
-			try {
-				socket.close();
-			} catch (IOException e) {
-			}
-		}
-	}
-
-	public static boolean weOwnFile(Context context, Uri uri) {
-		if (uri == null || !ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {
-			return false;
-		} else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
-			return fileIsInFilesDir(context, uri);
-		} else {
-			return weOwnFileLollipop(uri);
-		}
-	}
-
-	/**
-	 * This is more than hacky but probably way better than doing nothing
-	 * Further 'optimizations' might contain to get the parents of CacheDir and NoBackupDir
-	 * and check against those as well
-	 */
-	private static boolean fileIsInFilesDir(Context context, Uri uri) {
-		try {
-			final String haystack = context.getFilesDir().getParentFile().getCanonicalPath();
-			final String needle = new File(uri.getPath()).getCanonicalPath();
-			return needle.startsWith(haystack);
-		} catch (IOException e) {
-			return false;
-		}
-	}
-
-	@TargetApi(Build.VERSION_CODES.LOLLIPOP)
-	private static boolean weOwnFileLollipop(Uri uri) {
-		try {
-			File file = new File(uri.getPath());
-			FileDescriptor fd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY).getFileDescriptor();
-			StructStat st = Os.fstat(fd);
-			return st.st_uid == android.os.Process.myUid();
-		} catch (FileNotFoundException e) {
-			return false;
-		} catch (Exception e) {
-			return true;
-		}
-	}
-
-	private void createNoMedia(File diretory) {
-		final File noMedia = new File(diretory, ".nomedia");
-		if (!noMedia.exists()) {
-			try {
-				if (!noMedia.createNewFile()) {
-					Log.d(Config.LOGTAG, "created nomedia file " + noMedia.getAbsolutePath());
-				}
-			} catch (Exception e) {
-				Log.d(Config.LOGTAG, "could not create nomedia file");
-			}
-		}
-	}
-
-	public void updateMediaScanner(File file) {
-		if (!isInDirectoryThatShouldNotBeScanned(mXmppConnectionService, file)) {
-			Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
-			intent.setData(Uri.fromFile(file));
-			mXmppConnectionService.sendBroadcast(intent);
-		} else if (file.getAbsolutePath().startsWith(getAppMediaDirectory(mXmppConnectionService))) {
-			createNoMedia(file.getParentFile());
-		}
-	}
-
-	public boolean deleteFile(Message message) {
-		File file = getFile(message);
-		if (file.delete()) {
-			updateMediaScanner(file);
-			return true;
-		} else {
-			return false;
-		}
-	}
-
-	public DownloadableFile getFile(Message message) {
-		return getFile(message, true);
-	}
-
-	public DownloadableFile getFileForPath(String path, String mime) {
-		final DownloadableFile file;
-		if (path.startsWith("/")) {
-			file = new DownloadableFile(path);
-		} else {
-			if (mime != null && mime.startsWith("image/")) {
-				file = new DownloadableFile(getConversationsDirectory("Images") + path);
-			} else if (mime != null && mime.startsWith("video/")) {
-				file = new DownloadableFile(getConversationsDirectory("Videos") + path);
-			} else {
-				file = new DownloadableFile(getConversationsDirectory("Files") + path);
-			}
-		}
-		return file;
-	}
-
-	public DownloadableFile getFile(Message message, boolean decrypted) {
-		final boolean encrypted = !decrypted
-				&& (message.getEncryption() == Message.ENCRYPTION_PGP
-				|| message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
-		String path = message.getRelativeFilePath();
-		if (path == null) {
-			path = message.getUuid();
-		}
-		final DownloadableFile file = getFileForPath(path, message.getMimeType());
-		if (encrypted) {
-			return new DownloadableFile(getConversationsDirectory("Files") + file.getName() + ".pgp");
-		} else {
-			return file;
-		}
-	}
-
-	public String getConversationsDirectory(final String type) {
-		return getConversationsDirectory(mXmppConnectionService, type);
-	}
-
-	private Bitmap resize(final Bitmap originalBitmap, int size) throws IOException {
-		int w = originalBitmap.getWidth();
-		int h = originalBitmap.getHeight();
-		if (w <= 0 || h <= 0) {
-			throw new IOException("Decoded bitmap reported bounds smaller 0");
-		} else if (Math.max(w, h) > size) {
-			int scalledW;
-			int scalledH;
-			if (w <= h) {
-				scalledW = Math.max((int) (w / ((double) h / size)), 1);
-				scalledH = size;
-			} else {
-				scalledW = size;
-				scalledH = Math.max((int) (h / ((double) w / size)), 1);
-			}
-			final Bitmap result = Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
-			if (!originalBitmap.isRecycled()) {
-				originalBitmap.recycle();
-			}
-			return result;
-		} else {
-			return originalBitmap;
-		}
-	}
-
-	public boolean useImageAsIs(Uri uri) {
-		String path = getOriginalPath(uri);
-		if (path == null || isPathBlacklisted(path)) {
-			return false;
-		}
-		File file = new File(path);
-		long size = file.length();
-		if (size == 0 || size >= mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize)) {
-			return false;
-		}
-		BitmapFactory.Options options = new BitmapFactory.Options();
-		options.inJustDecodeBounds = true;
-		try {
-			BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri), null, options);
-			if (options.outMimeType == null || options.outHeight <= 0 || options.outWidth <= 0) {
-				return false;
-			}
-			return (options.outWidth <= Config.IMAGE_SIZE && options.outHeight <= Config.IMAGE_SIZE && options.outMimeType.contains(Config.IMAGE_FORMAT.name().toLowerCase()));
-		} catch (FileNotFoundException e) {
-			return false;
-		}
-	}
-
-	public String getOriginalPath(Uri uri) {
-		return FileUtils.getPath(mXmppConnectionService, uri);
-	}
-
-	private void copyFileToPrivateStorage(File file, Uri uri) throws FileCopyException {
-		Log.d(Config.LOGTAG, "copy file (" + uri.toString() + ") to private storage " + file.getAbsolutePath());
-		file.getParentFile().mkdirs();
-		OutputStream os = null;
-		InputStream is = null;
-		try {
-			file.createNewFile();
-			os = new FileOutputStream(file);
-			is = mXmppConnectionService.getContentResolver().openInputStream(uri);
-			byte[] buffer = new byte[1024];
-			int length;
-			while ((length = is.read(buffer)) > 0) {
-				try {
-					os.write(buffer, 0, length);
-				} catch (IOException e) {
-					throw new FileWriterException();
-				}
-			}
-			try {
-				os.flush();
-			} catch (IOException e) {
-				throw new FileWriterException();
-			}
-		} catch (FileNotFoundException e) {
-			throw new FileCopyException(R.string.error_file_not_found);
-		} catch (FileWriterException e) {
-			throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
-		} catch (IOException e) {
-			e.printStackTrace();
-			throw new FileCopyException(R.string.error_io_exception);
-		} finally {
-			close(os);
-			close(is);
-		}
-	}
-
-	public void copyFileToPrivateStorage(Message message, Uri uri, String type) throws FileCopyException {
-		String mime = type != null ? type : MimeUtils.guessMimeTypeFromUri(mXmppConnectionService, uri);
-		Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage (mime=" + mime + ")");
-		String extension = MimeUtils.guessExtensionFromMimeType(mime);
-		if (extension == null) {
-			Log.d(Config.LOGTAG, "extension from mime type was null");
-			extension = getExtensionFromUri(uri);
-		}
-		if ("ogg".equals(extension) && type != null && type.startsWith("audio/")) {
-			extension = "oga";
-		}
-		message.setRelativeFilePath(message.getUuid() + "." + extension);
-		copyFileToPrivateStorage(mXmppConnectionService.getFileBackend().getFile(message), uri);
-	}
-
-	private String getExtensionFromUri(Uri uri) {
-		String[] projection = {MediaStore.MediaColumns.DATA};
-		String filename = null;
-		Cursor cursor = mXmppConnectionService.getContentResolver().query(uri, projection, null, null, null);
-		if (cursor != null) {
-			try {
-				if (cursor.moveToFirst()) {
-					filename = cursor.getString(0);
-				}
-			} catch (Exception e) {
-				filename = null;
-			} finally {
-				cursor.close();
-			}
-		}
-		if (filename == null) {
-			final List<String> segments = uri.getPathSegments();
-			if (segments.size() > 0) {
-				filename = segments.get(segments.size() - 1);
-			}
-		}
-		int pos = filename == null ? -1 : filename.lastIndexOf('.');
-		return pos > 0 ? filename.substring(pos + 1) : null;
-	}
-
-	private void copyImageToPrivateStorage(File file, Uri image, int sampleSize) throws FileCopyException {
-		file.getParentFile().mkdirs();
-		InputStream is = null;
-		OutputStream os = null;
-		try {
-			if (!file.exists() && !file.createNewFile()) {
-				throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
-			}
-			is = mXmppConnectionService.getContentResolver().openInputStream(image);
-			if (is == null) {
-				throw new FileCopyException(R.string.error_not_an_image_file);
-			}
-			Bitmap originalBitmap;
-			BitmapFactory.Options options = new BitmapFactory.Options();
-			int inSampleSize = (int) Math.pow(2, sampleSize);
-			Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
-			options.inSampleSize = inSampleSize;
-			originalBitmap = BitmapFactory.decodeStream(is, null, options);
-			is.close();
-			if (originalBitmap == null) {
-				throw new FileCopyException(R.string.error_not_an_image_file);
-			}
-			Bitmap scaledBitmap = resize(originalBitmap, Config.IMAGE_SIZE);
-			int rotation = getRotation(image);
-			scaledBitmap = rotate(scaledBitmap, rotation);
-			boolean targetSizeReached = false;
-			int quality = Config.IMAGE_QUALITY;
-			final int imageMaxSize = mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize);
-			while (!targetSizeReached) {
-				os = new FileOutputStream(file);
-				boolean success = scaledBitmap.compress(Config.IMAGE_FORMAT, quality, os);
-				if (!success) {
-					throw new FileCopyException(R.string.error_compressing_image);
-				}
-				os.flush();
-				targetSizeReached = file.length() <= imageMaxSize || quality <= 50;
-				quality -= 5;
-			}
-			scaledBitmap.recycle();
-		} catch (FileNotFoundException e) {
-			throw new FileCopyException(R.string.error_file_not_found);
-		} catch (IOException e) {
-			e.printStackTrace();
-			throw new FileCopyException(R.string.error_io_exception);
-		} catch (SecurityException e) {
-			throw new FileCopyException(R.string.error_security_exception_during_image_copy);
-		} catch (OutOfMemoryError e) {
-			++sampleSize;
-			if (sampleSize <= 3) {
-				copyImageToPrivateStorage(file, image, sampleSize);
-			} else {
-				throw new FileCopyException(R.string.error_out_of_memory);
-			}
-		} finally {
-			close(os);
-			close(is);
-		}
-	}
-
-	public void copyImageToPrivateStorage(File file, Uri image) throws FileCopyException {
-		Log.d(Config.LOGTAG, "copy image (" + image.toString() + ") to private storage " + file.getAbsolutePath());
-		copyImageToPrivateStorage(file, image, 0);
-	}
-
-	public void copyImageToPrivateStorage(Message message, Uri image) throws FileCopyException {
-		switch (Config.IMAGE_FORMAT) {
-			case JPEG:
-				message.setRelativeFilePath(message.getUuid() + ".jpg");
-				break;
-			case PNG:
-				message.setRelativeFilePath(message.getUuid() + ".png");
-				break;
-			case WEBP:
-				message.setRelativeFilePath(message.getUuid() + ".webp");
-				break;
-		}
-		copyImageToPrivateStorage(getFile(message), image);
-		updateFileParams(message);
-	}
-
-	private int getRotation(File file) {
-		return getRotation(Uri.parse("file://" + file.getAbsolutePath()));
-	}
-
-	private int getRotation(Uri image) {
-		InputStream is = null;
-		try {
-			is = mXmppConnectionService.getContentResolver().openInputStream(image);
-			return ExifHelper.getOrientation(is);
-		} catch (FileNotFoundException e) {
-			return 0;
-		} finally {
-			close(is);
-		}
-	}
-
-	public Bitmap getThumbnail(Message message, int size, boolean cacheOnly) throws IOException {
-		final String uuid = message.getUuid();
-		final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
-		Bitmap thumbnail = cache.get(uuid);
-		if ((thumbnail == null) && (!cacheOnly)) {
-			synchronized (THUMBNAIL_LOCK) {
-				thumbnail = cache.get(uuid);
-				if (thumbnail != null) {
-					return thumbnail;
-				}
-				DownloadableFile file = getFile(message);
-				final String mime = file.getMimeType();
-				if (mime.startsWith("video/")) {
-					thumbnail = getVideoPreview(file, size);
-				} else {
-					Bitmap fullsize = getFullsizeImagePreview(file, size);
-					if (fullsize == null) {
-						throw new FileNotFoundException();
-					}
-					thumbnail = resize(fullsize, size);
-					thumbnail = rotate(thumbnail, getRotation(file));
-					if (mime.equals("image/gif")) {
-						Bitmap withGifOverlay = thumbnail.copy(Bitmap.Config.ARGB_8888, true);
-						drawOverlay(withGifOverlay, R.drawable.play_gif, 1.0f);
-						thumbnail.recycle();
-						thumbnail = withGifOverlay;
-					}
-				}
-				this.mXmppConnectionService.getBitmapCache().put(uuid, thumbnail);
-			}
-		}
-		return thumbnail;
-	}
-
-	private Bitmap getFullsizeImagePreview(File file, int size) {
-		BitmapFactory.Options options = new BitmapFactory.Options();
-		options.inSampleSize = calcSampleSize(file, size);
-		try {
-			return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
-		} catch (OutOfMemoryError e) {
-			options.inSampleSize *= 2;
-			return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
-		}
-	}
-
-	private void drawOverlay(Bitmap bitmap, int resource, float factor) {
-		Bitmap overlay = BitmapFactory.decodeResource(mXmppConnectionService.getResources(), resource);
-		Canvas canvas = new Canvas(bitmap);
-		float targetSize = Math.min(canvas.getWidth(), canvas.getHeight()) * factor;
-		Log.d(Config.LOGTAG, "target size overlay: " + targetSize + " overlay bitmap size was " + overlay.getHeight());
-		float left = (canvas.getWidth() - targetSize) / 2.0f;
-		float top = (canvas.getHeight() - targetSize) / 2.0f;
-		RectF dst = new RectF(left, top, left + targetSize - 1, top + targetSize - 1);
-		canvas.drawBitmap(overlay, null, dst, createAntiAliasingPaint());
-	}
-
-	private Bitmap getVideoPreview(File file, int size) {
-		MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
-		Bitmap frame;
-		try {
-			metadataRetriever.setDataSource(file.getAbsolutePath());
-			frame = metadataRetriever.getFrameAtTime(0);
-			metadataRetriever.release();
-			frame = resize(frame, size);
-		} catch (IOException | RuntimeException e) {
-			frame = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
-			frame.eraseColor(0xff000000);
-		}
-		drawOverlay(frame, R.drawable.play_video, 0.75f);
-		return frame;
-	}
-
-	public Uri getTakePhotoUri() {
-		File file;
-		if (Config.ONLY_INTERNAL_STORAGE) {
-			file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath(), "Camera/IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
-		} else {
-			file = new File(getTakePhotoPath() + "IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
-		}
-		file.getParentFile().mkdirs();
-		return getUriForFile(mXmppConnectionService, file);
-	}
-
-	public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
-
-		final Avatar uncompressAvatar = getUncompressedAvatar(image);
-		if (uncompressAvatar != null && uncompressAvatar.image.length() <= Config.AVATAR_CHAR_LIMIT) {
-			return uncompressAvatar;
-		}
-		if (uncompressAvatar != null) {
-			Log.d(Config.LOGTAG,"uncompressed avatar exceeded char limit by "+(uncompressAvatar.image.length() - Config.AVATAR_CHAR_LIMIT));
-		}
-
-		Bitmap bm = cropCenterSquare(image, size);
-		if (bm == null) {
-			return null;
-		}
-		if (hasAlpha(bm)) {
-			Log.d(Config.LOGTAG, "alpha in avatar detected; uploading as PNG");
-			bm.recycle();
-			bm = cropCenterSquare(image, 96);
-			return getPepAvatar(bm, Bitmap.CompressFormat.PNG, 100);
-		}
-		return getPepAvatar(bm, format, 100);
-	}
-
-	private Avatar getUncompressedAvatar(Uri uri) {
-		Bitmap bitmap = null;
-		try {
-			bitmap = BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri));
-			return getPepAvatar(bitmap, Bitmap.CompressFormat.PNG, 100);
-		} catch (Exception e) {
-			if (bitmap != null) {
-				bitmap.recycle();
-			}
-		}
-		return null;
-	}
-
-	private Avatar getPepAvatar(Bitmap bitmap, Bitmap.CompressFormat format, int quality) {
-		try {
-			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
-			Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
-			MessageDigest digest = MessageDigest.getInstance("SHA-1");
-			DigestOutputStream mDigestOutputStream = new DigestOutputStream(mBase64OutputStream, digest);
-			if (!bitmap.compress(format, quality, mDigestOutputStream)) {
-				return null;
-			}
-			mDigestOutputStream.flush();
-			mDigestOutputStream.close();
-			long chars = mByteArrayOutputStream.size();
-			if (format != Bitmap.CompressFormat.PNG && quality >= 50 && chars >= Config.AVATAR_CHAR_LIMIT) {
-				int q = quality - 2;
-				Log.d(Config.LOGTAG, "avatar char length was " + chars + " reducing quality to " + q);
-				return getPepAvatar(bitmap, format, q);
-			}
-			Log.d(Config.LOGTAG, "settled on char length " + chars + " with quality=" + quality);
-			final Avatar avatar = new Avatar();
-			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
-			avatar.image = new String(mByteArrayOutputStream.toByteArray());
-			if (format.equals(Bitmap.CompressFormat.WEBP)) {
-				avatar.type = "image/webp";
-			} else if (format.equals(Bitmap.CompressFormat.JPEG)) {
-				avatar.type = "image/jpeg";
-			} else if (format.equals(Bitmap.CompressFormat.PNG)) {
-				avatar.type = "image/png";
-			}
-			avatar.width = bitmap.getWidth();
-			avatar.height = bitmap.getHeight();
-			return avatar;
-		} catch (Exception e) {
-			return null;
-		}
-	}
-
-	public Avatar getStoredPepAvatar(String hash) {
-		if (hash == null) {
-			return null;
-		}
-		Avatar avatar = new Avatar();
-		File file = new File(getAvatarPath(hash));
-		FileInputStream is = null;
-		try {
-			avatar.size = file.length();
-			BitmapFactory.Options options = new BitmapFactory.Options();
-			options.inJustDecodeBounds = true;
-			BitmapFactory.decodeFile(file.getAbsolutePath(), options);
-			is = new FileInputStream(file);
-			ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
-			Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
-			MessageDigest digest = MessageDigest.getInstance("SHA-1");
-			DigestOutputStream os = new DigestOutputStream(mBase64OutputStream, digest);
-			byte[] buffer = new byte[4096];
-			int length;
-			while ((length = is.read(buffer)) > 0) {
-				os.write(buffer, 0, length);
-			}
-			os.flush();
-			os.close();
-			avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
-			avatar.image = new String(mByteArrayOutputStream.toByteArray());
-			avatar.height = options.outHeight;
-			avatar.width = options.outWidth;
-			avatar.type = options.outMimeType;
-			return avatar;
-		} catch (NoSuchAlgorithmException | IOException e) {
-			return null;
-		} finally {
-			close(is);
-		}
-	}
-
-	public boolean isAvatarCached(Avatar avatar) {
-		File file = new File(getAvatarPath(avatar.getFilename()));
-		return file.exists();
-	}
-
-	public boolean save(final Avatar avatar) {
-		File file;
-		if (isAvatarCached(avatar)) {
-			file = new File(getAvatarPath(avatar.getFilename()));
-			avatar.size = file.length();
-		} else {
-			file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath() + "/" + UUID.randomUUID().toString());
-			if (file.getParentFile().mkdirs()) {
-				Log.d(Config.LOGTAG, "created cache directory");
-			}
-			OutputStream os = null;
-			try {
-				if (!file.createNewFile()) {
-					Log.d(Config.LOGTAG, "unable to create temporary file " + file.getAbsolutePath());
-				}
-				os = new FileOutputStream(file);
-				MessageDigest digest = MessageDigest.getInstance("SHA-1");
-				digest.reset();
-				DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
-				final byte[] bytes = avatar.getImageAsBytes();
-				mDigestOutputStream.write(bytes);
-				mDigestOutputStream.flush();
-				mDigestOutputStream.close();
-				String sha1sum = CryptoHelper.bytesToHex(digest.digest());
-				if (sha1sum.equals(avatar.sha1sum)) {
-					File outputFile = new File(getAvatarPath(avatar.getFilename()));
-					if (outputFile.getParentFile().mkdirs()) {
-						Log.d(Config.LOGTAG, "created avatar directory");
-					}
-					String filename = getAvatarPath(avatar.getFilename());
-					if (!file.renameTo(new File(filename))) {
-						Log.d(Config.LOGTAG, "unable to rename " + file.getAbsolutePath() + " to " + outputFile);
-						return false;
-					}
-				} else {
-					Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
-					if (!file.delete()) {
-						Log.d(Config.LOGTAG, "unable to delete temporary file");
-					}
-					return false;
-				}
-				avatar.size = bytes.length;
-			} catch (IllegalArgumentException | IOException | NoSuchAlgorithmException e) {
-				return false;
-			} finally {
-				close(os);
-			}
-		}
-		return true;
-	}
-
-	private String getAvatarPath(String avatar) {
-		return mXmppConnectionService.getFilesDir().getAbsolutePath() + "/avatars/" + avatar;
-	}
-
-	public Uri getAvatarUri(String avatar) {
-		return Uri.parse("file:" + getAvatarPath(avatar));
-	}
-
-	public Bitmap cropCenterSquare(Uri image, int size) {
-		if (image == null) {
-			return null;
-		}
-		InputStream is = null;
-		try {
-			BitmapFactory.Options options = new BitmapFactory.Options();
-			options.inSampleSize = calcSampleSize(image, size);
-			is = mXmppConnectionService.getContentResolver().openInputStream(image);
-			if (is == null) {
-				return null;
-			}
-			Bitmap input = BitmapFactory.decodeStream(is, null, options);
-			if (input == null) {
-				return null;
-			} else {
-				input = rotate(input, getRotation(image));
-				return cropCenterSquare(input, size);
-			}
-		} catch (FileNotFoundException | SecurityException e) {
-			return null;
-		} finally {
-			close(is);
-		}
-	}
-
-	public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
-		if (image == null) {
-			return null;
-		}
-		InputStream is = null;
-		try {
-			BitmapFactory.Options options = new BitmapFactory.Options();
-			options.inSampleSize = calcSampleSize(image, Math.max(newHeight, newWidth));
-			is = mXmppConnectionService.getContentResolver().openInputStream(image);
-			if (is == null) {
-				return null;
-			}
-			Bitmap source = BitmapFactory.decodeStream(is, null, options);
-			if (source == null) {
-				return null;
-			}
-			int sourceWidth = source.getWidth();
-			int sourceHeight = source.getHeight();
-			float xScale = (float) newWidth / sourceWidth;
-			float yScale = (float) newHeight / sourceHeight;
-			float scale = Math.max(xScale, yScale);
-			float scaledWidth = scale * sourceWidth;
-			float scaledHeight = scale * sourceHeight;
-			float left = (newWidth - scaledWidth) / 2;
-			float top = (newHeight - scaledHeight) / 2;
-
-			RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
-			Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
-			Canvas canvas = new Canvas(dest);
-			canvas.drawBitmap(source, null, targetRect, createAntiAliasingPaint());
-			if (source.isRecycled()) {
-				source.recycle();
-			}
-			return dest;
-		} catch (SecurityException e) {
-			return null; //android 6.0 with revoked permissions for example
-		} catch (FileNotFoundException e) {
-			return null;
-		} finally {
-			close(is);
-		}
-	}
-
-	public Bitmap cropCenterSquare(Bitmap input, int size) {
-		int w = input.getWidth();
-		int h = input.getHeight();
-
-		float scale = Math.max((float) size / h, (float) size / w);
-
-		float outWidth = scale * w;
-		float outHeight = scale * h;
-		float left = (size - outWidth) / 2;
-		float top = (size - outHeight) / 2;
-		RectF target = new RectF(left, top, left + outWidth, top + outHeight);
-
-		Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
-		Canvas canvas = new Canvas(output);
-		canvas.drawBitmap(input, null, target, createAntiAliasingPaint());
-		if (!input.isRecycled()) {
-			input.recycle();
-		}
-		return output;
-	}
-
-	private int calcSampleSize(Uri image, int size) throws FileNotFoundException, SecurityException {
-		BitmapFactory.Options options = new BitmapFactory.Options();
-		options.inJustDecodeBounds = true;
-		BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
-		return calcSampleSize(options, size);
-	}
-
-	public void updateFileParams(Message message) {
-		updateFileParams(message, null);
-	}
-
-	public void updateFileParams(Message message, URL url) {
-		DownloadableFile file = getFile(message);
-		final String mime = file.getMimeType();
-		boolean image = message.getType() == Message.TYPE_IMAGE || (mime != null && mime.startsWith("image/"));
-		boolean video = mime != null && mime.startsWith("video/");
-		boolean audio = mime != null && mime.startsWith("audio/");
-		final StringBuilder body = new StringBuilder();
-		if (url != null) {
-			body.append(url.toString());
-		}
-		body.append('|').append(file.getSize());
-		if (image || video) {
-			try {
-				Dimensions dimensions = image ? getImageDimensions(file) : getVideoDimensions(file);
-				if (dimensions.valid()) {
-					body.append('|').append(dimensions.width).append('|').append(dimensions.height);
-				}
-			} catch (NotAVideoFile notAVideoFile) {
-				Log.d(Config.LOGTAG, "file with mime type " + file.getMimeType() + " was not a video file");
-				//fall threw
-			}
-		} else if (audio) {
-			body.append("|0|0|").append(getMediaRuntime(file));
-		}
-		message.setBody(body.toString());
-	}
-
-	public int getMediaRuntime(Uri uri) {
-		try {
-			MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
-			mediaMetadataRetriever.setDataSource(mXmppConnectionService, uri);
-			return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
-		} catch (RuntimeException e) {
-			return 0;
-		}
-	}
-
-	private int getMediaRuntime(File file) {
-		try {
-			MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
-			mediaMetadataRetriever.setDataSource(file.toString());
-			return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
-		} catch (RuntimeException e) {
-			return 0;
-		}
-	}
-
-	private Dimensions getImageDimensions(File file) {
-		BitmapFactory.Options options = new BitmapFactory.Options();
-		options.inJustDecodeBounds = true;
-		BitmapFactory.decodeFile(file.getAbsolutePath(), options);
-		int rotation = getRotation(file);
-		boolean rotated = rotation == 90 || rotation == 270;
-		int imageHeight = rotated ? options.outWidth : options.outHeight;
-		int imageWidth = rotated ? options.outHeight : options.outWidth;
-		return new Dimensions(imageHeight, imageWidth);
-	}
-
-	private Dimensions getVideoDimensions(File file) throws NotAVideoFile {
-		MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
-		try {
-			metadataRetriever.setDataSource(file.getAbsolutePath());
-		} catch (RuntimeException e) {
-			throw new NotAVideoFile(e);
-		}
-		return getVideoDimensions(metadataRetriever);
-	}
-
-	public Bitmap getAvatar(String avatar, int size) {
-		if (avatar == null) {
-			return null;
-		}
-		Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
-		if (bm == null) {
-			return null;
-		}
-		return bm;
-	}
-
-	public boolean isFileAvailable(Message message) {
-		return getFile(message).exists();
-	}
-
-	private static class Dimensions {
-		public final int width;
-		public final int height;
-
-		Dimensions(int height, int width) {
-			this.width = width;
-			this.height = height;
-		}
-
-		public int getMin() {
-			return Math.min(width, height);
-		}
-
-		public boolean valid() {
-			return width > 0 && height > 0;
-		}
-	}
-
-	private static class NotAVideoFile extends Exception {
-		public NotAVideoFile(Throwable t) {
-			super(t);
-		}
-
-		public NotAVideoFile() {
-			super();
-		}
-	}
-
-	public class FileCopyException extends Exception {
-		private static final long serialVersionUID = -1010013599132881427L;
-		private int resId;
-
-		public FileCopyException(int resId) {
-			this.resId = resId;
-		}
-
-		public int getResId() {
-			return resId;
-		}
-	}
+    private static final Object THUMBNAIL_LOCK = new Object();
+
+    private static final SimpleDateFormat IMAGE_DATE_FORMAT = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.US);
+
+    private static final String FILE_PROVIDER = ".files";
+
+    private XmppConnectionService mXmppConnectionService;
+
+    public FileBackend(XmppConnectionService service) {
+        this.mXmppConnectionService = service;
+    }
+
+    private static boolean isInDirectoryThatShouldNotBeScanned(Context context, File file) {
+        return isInDirectoryThatShouldNotBeScanned(context, file.getAbsolutePath());
+    }
+
+    public static boolean isInDirectoryThatShouldNotBeScanned(Context context, String path) {
+        for (String type : new String[]{RecordingActivity.STORAGE_DIRECTORY_TYPE_NAME, "Files"}) {
+            if (path.startsWith(getConversationsDirectory(context, type))) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public static long getFileSize(Context context, Uri uri) {
+        try {
+            final Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
+            if (cursor != null && cursor.moveToFirst()) {
+                long size = cursor.getLong(cursor.getColumnIndex(OpenableColumns.SIZE));
+                cursor.close();
+                return size;
+            } else {
+                return -1;
+            }
+        } catch (Exception e) {
+            return -1;
+        }
+    }
+
+    public static boolean allFilesUnderSize(Context context, List<Uri> uris, long max) {
+        if (max <= 0) {
+            Log.d(Config.LOGTAG, "server did not report max file size for http upload");
+            return true; //exception to be compatible with HTTP Upload < v0.2
+        }
+        for (Uri uri : uris) {
+            String mime = context.getContentResolver().getType(uri);
+            if (mime != null && mime.startsWith("video/")) {
+                try {
+                    Dimensions dimensions = FileBackend.getVideoDimensions(context, uri);
+                    if (dimensions.getMin() > 720) {
+                        Log.d(Config.LOGTAG, "do not consider video file with min width larger than 720 for size check");
+                        continue;
+                    }
+                } catch (NotAVideoFile notAVideoFile) {
+                    //ignore and fall through
+                }
+            }
+            if (FileBackend.getFileSize(context, uri) > max) {
+                Log.d(Config.LOGTAG, "not all files are under " + max + " bytes. suggesting falling back to jingle");
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public static String getConversationsDirectory(Context context, final String type) {
+        if (Config.ONLY_INTERNAL_STORAGE) {
+            return context.getFilesDir().getAbsolutePath() + "/" + type + "/";
+        } else {
+            return getAppMediaDirectory(context) + context.getString(R.string.app_name) + " " + type + "/";
+        }
+    }
+
+    public static String getAppMediaDirectory(Context context) {
+        return Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + context.getString(R.string.app_name) + "/Media/";
+    }
+
+    public static String getConversationsLogsDirectory() {
+        return Environment.getExternalStorageDirectory().getAbsolutePath() + "/Conversations/";
+    }
+
+    private static Bitmap rotate(Bitmap bitmap, int degree) {
+        if (degree == 0) {
+            return bitmap;
+        }
+        int w = bitmap.getWidth();
+        int h = bitmap.getHeight();
+        Matrix mtx = new Matrix();
+        mtx.postRotate(degree);
+        Bitmap result = Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
+        if (bitmap != null && !bitmap.isRecycled()) {
+            bitmap.recycle();
+        }
+        return result;
+    }
+
+    public static boolean isPathBlacklisted(String path) {
+        final String androidDataPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Android/data/";
+        return path.startsWith(androidDataPath);
+    }
+
+    private static Paint createAntiAliasingPaint() {
+        Paint paint = new Paint();
+        paint.setAntiAlias(true);
+        paint.setFilterBitmap(true);
+        paint.setDither(true);
+        return paint;
+    }
+
+    private static String getTakePhotoPath() {
+        return Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM) + "/Camera/";
+    }
+
+    public static Uri getUriForFile(Context context, File file) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N || Config.ONLY_INTERNAL_STORAGE) {
+            try {
+                return FileProvider.getUriForFile(context, getAuthority(context), file);
+            } catch (IllegalArgumentException e) {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                    throw new SecurityException(e);
+                } else {
+                    return Uri.fromFile(file);
+                }
+            }
+        } else {
+            return Uri.fromFile(file);
+        }
+    }
+
+    public static String getAuthority(Context context) {
+        return context.getPackageName() + FILE_PROVIDER;
+    }
+
+    private static boolean hasAlpha(final Bitmap bitmap) {
+        for (int x = 0; x < bitmap.getWidth(); ++x) {
+            for (int y = 0; y < bitmap.getWidth(); ++y) {
+                if (Color.alpha(bitmap.getPixel(x, y)) < 255) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    private static int calcSampleSize(File image, int size) {
+        BitmapFactory.Options options = new BitmapFactory.Options();
+        options.inJustDecodeBounds = true;
+        BitmapFactory.decodeFile(image.getAbsolutePath(), options);
+        return calcSampleSize(options, size);
+    }
+
+    private static int calcSampleSize(BitmapFactory.Options options, int size) {
+        int height = options.outHeight;
+        int width = options.outWidth;
+        int inSampleSize = 1;
+
+        if (height > size || width > size) {
+            int halfHeight = height / 2;
+            int halfWidth = width / 2;
+
+            while ((halfHeight / inSampleSize) > size
+                    && (halfWidth / inSampleSize) > size) {
+                inSampleSize *= 2;
+            }
+        }
+        return inSampleSize;
+    }
+
+    private static Dimensions getVideoDimensions(Context context, Uri uri) throws NotAVideoFile {
+        MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
+        try {
+            mediaMetadataRetriever.setDataSource(context, uri);
+        } catch (RuntimeException e) {
+            throw new NotAVideoFile(e);
+        }
+        return getVideoDimensions(mediaMetadataRetriever);
+    }
+
+    private static Dimensions getVideoDimensionsOfFrame(MediaMetadataRetriever mediaMetadataRetriever) {
+        Bitmap bitmap = null;
+        try {
+            bitmap = mediaMetadataRetriever.getFrameAtTime();
+            return new Dimensions(bitmap.getHeight(), bitmap.getWidth());
+        } catch (Exception e) {
+            return null;
+        } finally {
+            if (bitmap != null) {
+                bitmap.recycle();
+                ;
+            }
+        }
+    }
+
+    private static Dimensions getVideoDimensions(MediaMetadataRetriever metadataRetriever) throws NotAVideoFile {
+        String hasVideo = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_HAS_VIDEO);
+        if (hasVideo == null) {
+            throw new NotAVideoFile();
+        }
+        Dimensions dimensions = getVideoDimensionsOfFrame(metadataRetriever);
+        if (dimensions != null) {
+            return dimensions;
+        }
+        int rotation = extractRotationFromMediaRetriever(metadataRetriever);
+        boolean rotated = rotation == 90 || rotation == 270;
+        int height;
+        try {
+            String h = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_HEIGHT);
+            height = Integer.parseInt(h);
+        } catch (Exception e) {
+            height = -1;
+        }
+        int width;
+        try {
+            String w = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_WIDTH);
+            width = Integer.parseInt(w);
+        } catch (Exception e) {
+            width = -1;
+        }
+        metadataRetriever.release();
+        Log.d(Config.LOGTAG, "extracted video dims " + width + "x" + height);
+        return rotated ? new Dimensions(width, height) : new Dimensions(height, width);
+    }
+
+    private static int extractRotationFromMediaRetriever(MediaMetadataRetriever metadataRetriever) {
+        String r = metadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_VIDEO_ROTATION);
+        try {
+            return Integer.parseInt(r);
+        } catch (Exception e) {
+            return 0;
+        }
+    }
+
+    public static void close(Closeable stream) {
+        if (stream != null) {
+            try {
+                stream.close();
+            } catch (IOException e) {
+            }
+        }
+    }
+
+    public static void close(Socket socket) {
+        if (socket != null) {
+            try {
+                socket.close();
+            } catch (IOException e) {
+            }
+        }
+    }
+
+    public static boolean weOwnFile(Context context, Uri uri) {
+        if (uri == null || !ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {
+            return false;
+        } else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
+            return fileIsInFilesDir(context, uri);
+        } else {
+            return weOwnFileLollipop(uri);
+        }
+    }
+
+    /**
+     * This is more than hacky but probably way better than doing nothing
+     * Further 'optimizations' might contain to get the parents of CacheDir and NoBackupDir
+     * and check against those as well
+     */
+    private static boolean fileIsInFilesDir(Context context, Uri uri) {
+        try {
+            final String haystack = context.getFilesDir().getParentFile().getCanonicalPath();
+            final String needle = new File(uri.getPath()).getCanonicalPath();
+            return needle.startsWith(haystack);
+        } catch (IOException e) {
+            return false;
+        }
+    }
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    private static boolean weOwnFileLollipop(Uri uri) {
+        try {
+            File file = new File(uri.getPath());
+            FileDescriptor fd = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY).getFileDescriptor();
+            StructStat st = Os.fstat(fd);
+            return st.st_uid == android.os.Process.myUid();
+        } catch (FileNotFoundException e) {
+            return false;
+        } catch (Exception e) {
+            return true;
+        }
+    }
+
+    private void createNoMedia(File diretory) {
+        final File noMedia = new File(diretory, ".nomedia");
+        if (!noMedia.exists()) {
+            try {
+                if (!noMedia.createNewFile()) {
+                    Log.d(Config.LOGTAG, "created nomedia file " + noMedia.getAbsolutePath());
+                }
+            } catch (Exception e) {
+                Log.d(Config.LOGTAG, "could not create nomedia file");
+            }
+        }
+    }
+
+    public void updateMediaScanner(File file) {
+        if (!isInDirectoryThatShouldNotBeScanned(mXmppConnectionService, file)) {
+            Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
+            intent.setData(Uri.fromFile(file));
+            mXmppConnectionService.sendBroadcast(intent);
+        } else if (file.getAbsolutePath().startsWith(getAppMediaDirectory(mXmppConnectionService))) {
+            createNoMedia(file.getParentFile());
+        }
+    }
+
+    public boolean deleteFile(Message message) {
+        File file = getFile(message);
+        if (file.delete()) {
+            updateMediaScanner(file);
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    public DownloadableFile getFile(Message message) {
+        return getFile(message, true);
+    }
+
+    public DownloadableFile getFileForPath(String path, String mime) {
+        final DownloadableFile file;
+        if (path.startsWith("/")) {
+            file = new DownloadableFile(path);
+        } else {
+            if (mime != null && mime.startsWith("image/")) {
+                file = new DownloadableFile(getConversationsDirectory("Images") + path);
+            } else if (mime != null && mime.startsWith("video/")) {
+                file = new DownloadableFile(getConversationsDirectory("Videos") + path);
+            } else {
+                file = new DownloadableFile(getConversationsDirectory("Files") + path);
+            }
+        }
+        return file;
+    }
+
+    public DownloadableFile getFile(Message message, boolean decrypted) {
+        final boolean encrypted = !decrypted
+                && (message.getEncryption() == Message.ENCRYPTION_PGP
+                || message.getEncryption() == Message.ENCRYPTION_DECRYPTED);
+        String path = message.getRelativeFilePath();
+        if (path == null) {
+            path = message.getUuid();
+        }
+        final DownloadableFile file = getFileForPath(path, message.getMimeType());
+        if (encrypted) {
+            return new DownloadableFile(getConversationsDirectory("Files") + file.getName() + ".pgp");
+        } else {
+            return file;
+        }
+    }
+
+    public String getConversationsDirectory(final String type) {
+        return getConversationsDirectory(mXmppConnectionService, type);
+    }
+
+    private Bitmap resize(final Bitmap originalBitmap, int size) throws IOException {
+        int w = originalBitmap.getWidth();
+        int h = originalBitmap.getHeight();
+        if (w <= 0 || h <= 0) {
+            throw new IOException("Decoded bitmap reported bounds smaller 0");
+        } else if (Math.max(w, h) > size) {
+            int scalledW;
+            int scalledH;
+            if (w <= h) {
+                scalledW = Math.max((int) (w / ((double) h / size)), 1);
+                scalledH = size;
+            } else {
+                scalledW = size;
+                scalledH = Math.max((int) (h / ((double) w / size)), 1);
+            }
+            final Bitmap result = Bitmap.createScaledBitmap(originalBitmap, scalledW, scalledH, true);
+            if (!originalBitmap.isRecycled()) {
+                originalBitmap.recycle();
+            }
+            return result;
+        } else {
+            return originalBitmap;
+        }
+    }
+
+    public boolean useImageAsIs(Uri uri) {
+        String path = getOriginalPath(uri);
+        if (path == null || isPathBlacklisted(path)) {
+            return false;
+        }
+        File file = new File(path);
+        long size = file.length();
+        if (size == 0 || size >= mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize)) {
+            return false;
+        }
+        BitmapFactory.Options options = new BitmapFactory.Options();
+        options.inJustDecodeBounds = true;
+        try {
+            BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri), null, options);
+            if (options.outMimeType == null || options.outHeight <= 0 || options.outWidth <= 0) {
+                return false;
+            }
+            return (options.outWidth <= Config.IMAGE_SIZE && options.outHeight <= Config.IMAGE_SIZE && options.outMimeType.contains(Config.IMAGE_FORMAT.name().toLowerCase()));
+        } catch (FileNotFoundException e) {
+            return false;
+        }
+    }
+
+    public String getOriginalPath(Uri uri) {
+        return FileUtils.getPath(mXmppConnectionService, uri);
+    }
+
+    private void copyFileToPrivateStorage(File file, Uri uri) throws FileCopyException {
+        Log.d(Config.LOGTAG, "copy file (" + uri.toString() + ") to private storage " + file.getAbsolutePath());
+        file.getParentFile().mkdirs();
+        OutputStream os = null;
+        InputStream is = null;
+        try {
+            file.createNewFile();
+            os = new FileOutputStream(file);
+            is = mXmppConnectionService.getContentResolver().openInputStream(uri);
+            byte[] buffer = new byte[1024];
+            int length;
+            while ((length = is.read(buffer)) > 0) {
+                try {
+                    os.write(buffer, 0, length);
+                } catch (IOException e) {
+                    throw new FileWriterException();
+                }
+            }
+            try {
+                os.flush();
+            } catch (IOException e) {
+                throw new FileWriterException();
+            }
+        } catch (FileNotFoundException e) {
+            throw new FileCopyException(R.string.error_file_not_found);
+        } catch (FileWriterException e) {
+            throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
+        } catch (IOException e) {
+            e.printStackTrace();
+            throw new FileCopyException(R.string.error_io_exception);
+        } finally {
+            close(os);
+            close(is);
+        }
+    }
+
+    public void copyFileToPrivateStorage(Message message, Uri uri, String type) throws FileCopyException {
+        String mime = type != null ? type : MimeUtils.guessMimeTypeFromUri(mXmppConnectionService, uri);
+        Log.d(Config.LOGTAG, "copy " + uri.toString() + " to private storage (mime=" + mime + ")");
+        String extension = MimeUtils.guessExtensionFromMimeType(mime);
+        if (extension == null) {
+            Log.d(Config.LOGTAG, "extension from mime type was null");
+            extension = getExtensionFromUri(uri);
+        }
+        if ("ogg".equals(extension) && type != null && type.startsWith("audio/")) {
+            extension = "oga";
+        }
+        message.setRelativeFilePath(message.getUuid() + "." + extension);
+        copyFileToPrivateStorage(mXmppConnectionService.getFileBackend().getFile(message), uri);
+    }
+
+    private String getExtensionFromUri(Uri uri) {
+        String[] projection = {MediaStore.MediaColumns.DATA};
+        String filename = null;
+        Cursor cursor = mXmppConnectionService.getContentResolver().query(uri, projection, null, null, null);
+        if (cursor != null) {
+            try {
+                if (cursor.moveToFirst()) {
+                    filename = cursor.getString(0);
+                }
+            } catch (Exception e) {
+                filename = null;
+            } finally {
+                cursor.close();
+            }
+        }
+        if (filename == null) {
+            final List<String> segments = uri.getPathSegments();
+            if (segments.size() > 0) {
+                filename = segments.get(segments.size() - 1);
+            }
+        }
+        int pos = filename == null ? -1 : filename.lastIndexOf('.');
+        return pos > 0 ? filename.substring(pos + 1) : null;
+    }
+
+    private void copyImageToPrivateStorage(File file, Uri image, int sampleSize) throws FileCopyException {
+        file.getParentFile().mkdirs();
+        InputStream is = null;
+        OutputStream os = null;
+        try {
+            if (!file.exists() && !file.createNewFile()) {
+                throw new FileCopyException(R.string.error_unable_to_create_temporary_file);
+            }
+            is = mXmppConnectionService.getContentResolver().openInputStream(image);
+            if (is == null) {
+                throw new FileCopyException(R.string.error_not_an_image_file);
+            }
+            Bitmap originalBitmap;
+            BitmapFactory.Options options = new BitmapFactory.Options();
+            int inSampleSize = (int) Math.pow(2, sampleSize);
+            Log.d(Config.LOGTAG, "reading bitmap with sample size " + inSampleSize);
+            options.inSampleSize = inSampleSize;
+            originalBitmap = BitmapFactory.decodeStream(is, null, options);
+            is.close();
+            if (originalBitmap == null) {
+                throw new FileCopyException(R.string.error_not_an_image_file);
+            }
+            Bitmap scaledBitmap = resize(originalBitmap, Config.IMAGE_SIZE);
+            int rotation = getRotation(image);
+            scaledBitmap = rotate(scaledBitmap, rotation);
+            boolean targetSizeReached = false;
+            int quality = Config.IMAGE_QUALITY;
+            final int imageMaxSize = mXmppConnectionService.getResources().getInteger(R.integer.auto_accept_filesize);
+            while (!targetSizeReached) {
+                os = new FileOutputStream(file);
+                boolean success = scaledBitmap.compress(Config.IMAGE_FORMAT, quality, os);
+                if (!success) {
+                    throw new FileCopyException(R.string.error_compressing_image);
+                }
+                os.flush();
+                targetSizeReached = file.length() <= imageMaxSize || quality <= 50;
+                quality -= 5;
+            }
+            scaledBitmap.recycle();
+        } catch (FileNotFoundException e) {
+            throw new FileCopyException(R.string.error_file_not_found);
+        } catch (IOException e) {
+            e.printStackTrace();
+            throw new FileCopyException(R.string.error_io_exception);
+        } catch (SecurityException e) {
+            throw new FileCopyException(R.string.error_security_exception_during_image_copy);
+        } catch (OutOfMemoryError e) {
+            ++sampleSize;
+            if (sampleSize <= 3) {
+                copyImageToPrivateStorage(file, image, sampleSize);
+            } else {
+                throw new FileCopyException(R.string.error_out_of_memory);
+            }
+        } finally {
+            close(os);
+            close(is);
+        }
+    }
+
+    public void copyImageToPrivateStorage(File file, Uri image) throws FileCopyException {
+        Log.d(Config.LOGTAG, "copy image (" + image.toString() + ") to private storage " + file.getAbsolutePath());
+        copyImageToPrivateStorage(file, image, 0);
+    }
+
+    public void copyImageToPrivateStorage(Message message, Uri image) throws FileCopyException {
+        switch (Config.IMAGE_FORMAT) {
+            case JPEG:
+                message.setRelativeFilePath(message.getUuid() + ".jpg");
+                break;
+            case PNG:
+                message.setRelativeFilePath(message.getUuid() + ".png");
+                break;
+            case WEBP:
+                message.setRelativeFilePath(message.getUuid() + ".webp");
+                break;
+        }
+        copyImageToPrivateStorage(getFile(message), image);
+        updateFileParams(message);
+    }
+
+    private int getRotation(File file) {
+        return getRotation(Uri.parse("file://" + file.getAbsolutePath()));
+    }
+
+    private int getRotation(Uri image) {
+        InputStream is = null;
+        try {
+            is = mXmppConnectionService.getContentResolver().openInputStream(image);
+            return ExifHelper.getOrientation(is);
+        } catch (FileNotFoundException e) {
+            return 0;
+        } finally {
+            close(is);
+        }
+    }
+
+    public Bitmap getThumbnail(Message message, int size, boolean cacheOnly) throws IOException {
+        final String uuid = message.getUuid();
+        final LruCache<String, Bitmap> cache = mXmppConnectionService.getBitmapCache();
+        Bitmap thumbnail = cache.get(uuid);
+        if ((thumbnail == null) && (!cacheOnly)) {
+            synchronized (THUMBNAIL_LOCK) {
+                thumbnail = cache.get(uuid);
+                if (thumbnail != null) {
+                    return thumbnail;
+                }
+                DownloadableFile file = getFile(message);
+                final String mime = file.getMimeType();
+                if (mime.startsWith("video/")) {
+                    thumbnail = getVideoPreview(file, size);
+                } else {
+                    Bitmap fullsize = getFullsizeImagePreview(file, size);
+                    if (fullsize == null) {
+                        throw new FileNotFoundException();
+                    }
+                    thumbnail = resize(fullsize, size);
+                    thumbnail = rotate(thumbnail, getRotation(file));
+                    if (mime.equals("image/gif")) {
+                        Bitmap withGifOverlay = thumbnail.copy(Bitmap.Config.ARGB_8888, true);
+                        drawOverlay(withGifOverlay, paintOverlayBlack(withGifOverlay) ? R.drawable.play_gif_black : R.drawable.play_gif_white, 1.0f);
+                        thumbnail.recycle();
+                        thumbnail = withGifOverlay;
+                    }
+                }
+                this.mXmppConnectionService.getBitmapCache().put(uuid, thumbnail);
+            }
+        }
+        return thumbnail;
+    }
+
+    private Bitmap getFullsizeImagePreview(File file, int size) {
+        BitmapFactory.Options options = new BitmapFactory.Options();
+        options.inSampleSize = calcSampleSize(file, size);
+        try {
+            return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
+        } catch (OutOfMemoryError e) {
+            options.inSampleSize *= 2;
+            return BitmapFactory.decodeFile(file.getAbsolutePath(), options);
+        }
+    }
+
+    private void drawOverlay(Bitmap bitmap, int resource, float factor) {
+        Bitmap overlay = BitmapFactory.decodeResource(mXmppConnectionService.getResources(), resource);
+        Canvas canvas = new Canvas(bitmap);
+        float targetSize = Math.min(canvas.getWidth(), canvas.getHeight()) * factor;
+        Log.d(Config.LOGTAG, "target size overlay: " + targetSize + " overlay bitmap size was " + overlay.getHeight());
+        float left = (canvas.getWidth() - targetSize) / 2.0f;
+        float top = (canvas.getHeight() - targetSize) / 2.0f;
+        RectF dst = new RectF(left, top, left + targetSize - 1, top + targetSize - 1);
+        canvas.drawBitmap(overlay, null, dst, createAntiAliasingPaint());
+    }
+
+    /**
+     * https://stackoverflow.com/a/3943023/210897
+     */
+    private boolean paintOverlayBlack(final Bitmap bitmap) {
+        int record = 0;
+        for (int y = 0; y < bitmap.getHeight(); ++y) {
+            for (int x = 0; x < bitmap.getWidth(); ++x) {
+                int pixel = bitmap.getPixel(x, y);
+                if ((Color.red(pixel) * 0.299 + Color.green(pixel) * 0.587 + Color.blue(pixel) * 0.114) > 186) {
+                    --record;
+                } else {
+                    ++record;
+                }
+            }
+        }
+        return record < 0;
+    }
+
+    private Bitmap getVideoPreview(File file, int size) {
+        MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
+        Bitmap frame;
+        try {
+            metadataRetriever.setDataSource(file.getAbsolutePath());
+            frame = metadataRetriever.getFrameAtTime(0);
+            metadataRetriever.release();
+            frame = resize(frame, size);
+        } catch (IOException | RuntimeException e) {
+            frame = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
+            frame.eraseColor(0xff000000);
+        }
+        drawOverlay(frame, paintOverlayBlack(frame) ? R.drawable.play_video_black : R.drawable.play_video_white, 0.75f);
+        return frame;
+    }
+
+    public Uri getTakePhotoUri() {
+        File file;
+        if (Config.ONLY_INTERNAL_STORAGE) {
+            file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath(), "Camera/IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
+        } else {
+            file = new File(getTakePhotoPath() + "IMG_" + this.IMAGE_DATE_FORMAT.format(new Date()) + ".jpg");
+        }
+        file.getParentFile().mkdirs();
+        return getUriForFile(mXmppConnectionService, file);
+    }
+
+    public Avatar getPepAvatar(Uri image, int size, Bitmap.CompressFormat format) {
+
+        final Avatar uncompressAvatar = getUncompressedAvatar(image);
+        if (uncompressAvatar != null && uncompressAvatar.image.length() <= Config.AVATAR_CHAR_LIMIT) {
+            return uncompressAvatar;
+        }
+        if (uncompressAvatar != null) {
+            Log.d(Config.LOGTAG, "uncompressed avatar exceeded char limit by " + (uncompressAvatar.image.length() - Config.AVATAR_CHAR_LIMIT));
+        }
+
+        Bitmap bm = cropCenterSquare(image, size);
+        if (bm == null) {
+            return null;
+        }
+        if (hasAlpha(bm)) {
+            Log.d(Config.LOGTAG, "alpha in avatar detected; uploading as PNG");
+            bm.recycle();
+            bm = cropCenterSquare(image, 96);
+            return getPepAvatar(bm, Bitmap.CompressFormat.PNG, 100);
+        }
+        return getPepAvatar(bm, format, 100);
+    }
+
+    private Avatar getUncompressedAvatar(Uri uri) {
+        Bitmap bitmap = null;
+        try {
+            bitmap = BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(uri));
+            return getPepAvatar(bitmap, Bitmap.CompressFormat.PNG, 100);
+        } catch (Exception e) {
+            if (bitmap != null) {
+                bitmap.recycle();
+            }
+        }
+        return null;
+    }
+
+    private Avatar getPepAvatar(Bitmap bitmap, Bitmap.CompressFormat format, int quality) {
+        try {
+            ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
+            Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
+            MessageDigest digest = MessageDigest.getInstance("SHA-1");
+            DigestOutputStream mDigestOutputStream = new DigestOutputStream(mBase64OutputStream, digest);
+            if (!bitmap.compress(format, quality, mDigestOutputStream)) {
+                return null;
+            }
+            mDigestOutputStream.flush();
+            mDigestOutputStream.close();
+            long chars = mByteArrayOutputStream.size();
+            if (format != Bitmap.CompressFormat.PNG && quality >= 50 && chars >= Config.AVATAR_CHAR_LIMIT) {
+                int q = quality - 2;
+                Log.d(Config.LOGTAG, "avatar char length was " + chars + " reducing quality to " + q);
+                return getPepAvatar(bitmap, format, q);
+            }
+            Log.d(Config.LOGTAG, "settled on char length " + chars + " with quality=" + quality);
+            final Avatar avatar = new Avatar();
+            avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
+            avatar.image = new String(mByteArrayOutputStream.toByteArray());
+            if (format.equals(Bitmap.CompressFormat.WEBP)) {
+                avatar.type = "image/webp";
+            } else if (format.equals(Bitmap.CompressFormat.JPEG)) {
+                avatar.type = "image/jpeg";
+            } else if (format.equals(Bitmap.CompressFormat.PNG)) {
+                avatar.type = "image/png";
+            }
+            avatar.width = bitmap.getWidth();
+            avatar.height = bitmap.getHeight();
+            return avatar;
+        } catch (Exception e) {
+            return null;
+        }
+    }
+
+    public Avatar getStoredPepAvatar(String hash) {
+        if (hash == null) {
+            return null;
+        }
+        Avatar avatar = new Avatar();
+        File file = new File(getAvatarPath(hash));
+        FileInputStream is = null;
+        try {
+            avatar.size = file.length();
+            BitmapFactory.Options options = new BitmapFactory.Options();
+            options.inJustDecodeBounds = true;
+            BitmapFactory.decodeFile(file.getAbsolutePath(), options);
+            is = new FileInputStream(file);
+            ByteArrayOutputStream mByteArrayOutputStream = new ByteArrayOutputStream();
+            Base64OutputStream mBase64OutputStream = new Base64OutputStream(mByteArrayOutputStream, Base64.DEFAULT);
+            MessageDigest digest = MessageDigest.getInstance("SHA-1");
+            DigestOutputStream os = new DigestOutputStream(mBase64OutputStream, digest);
+            byte[] buffer = new byte[4096];
+            int length;
+            while ((length = is.read(buffer)) > 0) {
+                os.write(buffer, 0, length);
+            }
+            os.flush();
+            os.close();
+            avatar.sha1sum = CryptoHelper.bytesToHex(digest.digest());
+            avatar.image = new String(mByteArrayOutputStream.toByteArray());
+            avatar.height = options.outHeight;
+            avatar.width = options.outWidth;
+            avatar.type = options.outMimeType;
+            return avatar;
+        } catch (NoSuchAlgorithmException | IOException e) {
+            return null;
+        } finally {
+            close(is);
+        }
+    }
+
+    public boolean isAvatarCached(Avatar avatar) {
+        File file = new File(getAvatarPath(avatar.getFilename()));
+        return file.exists();
+    }
+
+    public boolean save(final Avatar avatar) {
+        File file;
+        if (isAvatarCached(avatar)) {
+            file = new File(getAvatarPath(avatar.getFilename()));
+            avatar.size = file.length();
+        } else {
+            file = new File(mXmppConnectionService.getCacheDir().getAbsolutePath() + "/" + UUID.randomUUID().toString());
+            if (file.getParentFile().mkdirs()) {
+                Log.d(Config.LOGTAG, "created cache directory");
+            }
+            OutputStream os = null;
+            try {
+                if (!file.createNewFile()) {
+                    Log.d(Config.LOGTAG, "unable to create temporary file " + file.getAbsolutePath());
+                }
+                os = new FileOutputStream(file);
+                MessageDigest digest = MessageDigest.getInstance("SHA-1");
+                digest.reset();
+                DigestOutputStream mDigestOutputStream = new DigestOutputStream(os, digest);
+                final byte[] bytes = avatar.getImageAsBytes();
+                mDigestOutputStream.write(bytes);
+                mDigestOutputStream.flush();
+                mDigestOutputStream.close();
+                String sha1sum = CryptoHelper.bytesToHex(digest.digest());
+                if (sha1sum.equals(avatar.sha1sum)) {
+                    File outputFile = new File(getAvatarPath(avatar.getFilename()));
+                    if (outputFile.getParentFile().mkdirs()) {
+                        Log.d(Config.LOGTAG, "created avatar directory");
+                    }
+                    String filename = getAvatarPath(avatar.getFilename());
+                    if (!file.renameTo(new File(filename))) {
+                        Log.d(Config.LOGTAG, "unable to rename " + file.getAbsolutePath() + " to " + outputFile);
+                        return false;
+                    }
+                } else {
+                    Log.d(Config.LOGTAG, "sha1sum mismatch for " + avatar.owner);
+                    if (!file.delete()) {
+                        Log.d(Config.LOGTAG, "unable to delete temporary file");
+                    }
+                    return false;
+                }
+                avatar.size = bytes.length;
+            } catch (IllegalArgumentException | IOException | NoSuchAlgorithmException e) {
+                return false;
+            } finally {
+                close(os);
+            }
+        }
+        return true;
+    }
+
+    private String getAvatarPath(String avatar) {
+        return mXmppConnectionService.getFilesDir().getAbsolutePath() + "/avatars/" + avatar;
+    }
+
+    public Uri getAvatarUri(String avatar) {
+        return Uri.parse("file:" + getAvatarPath(avatar));
+    }
+
+    public Bitmap cropCenterSquare(Uri image, int size) {
+        if (image == null) {
+            return null;
+        }
+        InputStream is = null;
+        try {
+            BitmapFactory.Options options = new BitmapFactory.Options();
+            options.inSampleSize = calcSampleSize(image, size);
+            is = mXmppConnectionService.getContentResolver().openInputStream(image);
+            if (is == null) {
+                return null;
+            }
+            Bitmap input = BitmapFactory.decodeStream(is, null, options);
+            if (input == null) {
+                return null;
+            } else {
+                input = rotate(input, getRotation(image));
+                return cropCenterSquare(input, size);
+            }
+        } catch (FileNotFoundException | SecurityException e) {
+            return null;
+        } finally {
+            close(is);
+        }
+    }
+
+    public Bitmap cropCenter(Uri image, int newHeight, int newWidth) {
+        if (image == null) {
+            return null;
+        }
+        InputStream is = null;
+        try {
+            BitmapFactory.Options options = new BitmapFactory.Options();
+            options.inSampleSize = calcSampleSize(image, Math.max(newHeight, newWidth));
+            is = mXmppConnectionService.getContentResolver().openInputStream(image);
+            if (is == null) {
+                return null;
+            }
+            Bitmap source = BitmapFactory.decodeStream(is, null, options);
+            if (source == null) {
+                return null;
+            }
+            int sourceWidth = source.getWidth();
+            int sourceHeight = source.getHeight();
+            float xScale = (float) newWidth / sourceWidth;
+            float yScale = (float) newHeight / sourceHeight;
+            float scale = Math.max(xScale, yScale);
+            float scaledWidth = scale * sourceWidth;
+            float scaledHeight = scale * sourceHeight;
+            float left = (newWidth - scaledWidth) / 2;
+            float top = (newHeight - scaledHeight) / 2;
+
+            RectF targetRect = new RectF(left, top, left + scaledWidth, top + scaledHeight);
+            Bitmap dest = Bitmap.createBitmap(newWidth, newHeight, Bitmap.Config.ARGB_8888);
+            Canvas canvas = new Canvas(dest);
+            canvas.drawBitmap(source, null, targetRect, createAntiAliasingPaint());
+            if (source.isRecycled()) {
+                source.recycle();
+            }
+            return dest;
+        } catch (SecurityException e) {
+            return null; //android 6.0 with revoked permissions for example
+        } catch (FileNotFoundException e) {
+            return null;
+        } finally {
+            close(is);
+        }
+    }
+
+    public Bitmap cropCenterSquare(Bitmap input, int size) {
+        int w = input.getWidth();
+        int h = input.getHeight();
+
+        float scale = Math.max((float) size / h, (float) size / w);
+
+        float outWidth = scale * w;
+        float outHeight = scale * h;
+        float left = (size - outWidth) / 2;
+        float top = (size - outHeight) / 2;
+        RectF target = new RectF(left, top, left + outWidth, top + outHeight);
+
+        Bitmap output = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
+        Canvas canvas = new Canvas(output);
+        canvas.drawBitmap(input, null, target, createAntiAliasingPaint());
+        if (!input.isRecycled()) {
+            input.recycle();
+        }
+        return output;
+    }
+
+    private int calcSampleSize(Uri image, int size) throws FileNotFoundException, SecurityException {
+        BitmapFactory.Options options = new BitmapFactory.Options();
+        options.inJustDecodeBounds = true;
+        BitmapFactory.decodeStream(mXmppConnectionService.getContentResolver().openInputStream(image), null, options);
+        return calcSampleSize(options, size);
+    }
+
+    public void updateFileParams(Message message) {
+        updateFileParams(message, null);
+    }
+
+    public void updateFileParams(Message message, URL url) {
+        DownloadableFile file = getFile(message);
+        final String mime = file.getMimeType();
+        boolean image = message.getType() == Message.TYPE_IMAGE || (mime != null && mime.startsWith("image/"));
+        boolean video = mime != null && mime.startsWith("video/");
+        boolean audio = mime != null && mime.startsWith("audio/");
+        final StringBuilder body = new StringBuilder();
+        if (url != null) {
+            body.append(url.toString());
+        }
+        body.append('|').append(file.getSize());
+        if (image || video) {
+            try {
+                Dimensions dimensions = image ? getImageDimensions(file) : getVideoDimensions(file);
+                if (dimensions.valid()) {
+                    body.append('|').append(dimensions.width).append('|').append(dimensions.height);
+                }
+            } catch (NotAVideoFile notAVideoFile) {
+                Log.d(Config.LOGTAG, "file with mime type " + file.getMimeType() + " was not a video file");
+                //fall threw
+            }
+        } else if (audio) {
+            body.append("|0|0|").append(getMediaRuntime(file));
+        }
+        message.setBody(body.toString());
+    }
+
+    public int getMediaRuntime(Uri uri) {
+        try {
+            MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
+            mediaMetadataRetriever.setDataSource(mXmppConnectionService, uri);
+            return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
+        } catch (RuntimeException e) {
+            return 0;
+        }
+    }
+
+    private int getMediaRuntime(File file) {
+        try {
+            MediaMetadataRetriever mediaMetadataRetriever = new MediaMetadataRetriever();
+            mediaMetadataRetriever.setDataSource(file.toString());
+            return Integer.parseInt(mediaMetadataRetriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION));
+        } catch (RuntimeException e) {
+            return 0;
+        }
+    }
+
+    private Dimensions getImageDimensions(File file) {
+        BitmapFactory.Options options = new BitmapFactory.Options();
+        options.inJustDecodeBounds = true;
+        BitmapFactory.decodeFile(file.getAbsolutePath(), options);
+        int rotation = getRotation(file);
+        boolean rotated = rotation == 90 || rotation == 270;
+        int imageHeight = rotated ? options.outWidth : options.outHeight;
+        int imageWidth = rotated ? options.outHeight : options.outWidth;
+        return new Dimensions(imageHeight, imageWidth);
+    }
+
+    private Dimensions getVideoDimensions(File file) throws NotAVideoFile {
+        MediaMetadataRetriever metadataRetriever = new MediaMetadataRetriever();
+        try {
+            metadataRetriever.setDataSource(file.getAbsolutePath());
+        } catch (RuntimeException e) {
+            throw new NotAVideoFile(e);
+        }
+        return getVideoDimensions(metadataRetriever);
+    }
+
+    public Bitmap getAvatar(String avatar, int size) {
+        if (avatar == null) {
+            return null;
+        }
+        Bitmap bm = cropCenter(getAvatarUri(avatar), size, size);
+        if (bm == null) {
+            return null;
+        }
+        return bm;
+    }
+
+    public boolean isFileAvailable(Message message) {
+        return getFile(message).exists();
+    }
+
+    private static class Dimensions {
+        public final int width;
+        public final int height;
+
+        Dimensions(int height, int width) {
+            this.width = width;
+            this.height = height;
+        }
+
+        public int getMin() {
+            return Math.min(width, height);
+        }
+
+        public boolean valid() {
+            return width > 0 && height > 0;
+        }
+    }
+
+    private static class NotAVideoFile extends Exception {
+        public NotAVideoFile(Throwable t) {
+            super(t);
+        }
+
+        public NotAVideoFile() {
+            super();
+        }
+    }
+
+    public class FileCopyException extends Exception {
+        private static final long serialVersionUID = -1010013599132881427L;
+        private int resId;
+
+        public FileCopyException(int resId) {
+            this.resId = resId;
+        }
+
+        public int getResId() {
+            return resId;
+        }
+    }
 }