MessageAdapter.java

   1package eu.siacs.conversations.ui.adapter;
   2
   3import android.content.ActivityNotFoundException;
   4import android.content.Intent;
   5import android.content.pm.PackageManager;
   6import android.content.pm.ResolveInfo;
   7import android.content.res.Resources;
   8import android.graphics.Bitmap;
   9import android.graphics.Typeface;
  10import android.graphics.drawable.BitmapDrawable;
  11import android.graphics.drawable.Drawable;
  12import android.net.Uri;
  13import android.os.AsyncTask;
  14import android.support.v4.content.ContextCompat;
  15import android.text.Spannable;
  16import android.text.SpannableString;
  17import android.text.SpannableStringBuilder;
  18import android.text.Spanned;
  19import android.text.format.DateUtils;
  20import android.text.style.ForegroundColorSpan;
  21import android.text.style.RelativeSizeSpan;
  22import android.text.style.StyleSpan;
  23import android.text.util.Linkify;
  24import android.util.DisplayMetrics;
  25import android.view.ActionMode;
  26import android.view.Menu;
  27import android.view.MenuItem;
  28import android.view.View;
  29import android.view.View.OnClickListener;
  30import android.view.View.OnLongClickListener;
  31import android.view.ViewGroup;
  32import android.widget.ArrayAdapter;
  33import android.widget.Button;
  34import android.widget.ImageView;
  35import android.widget.LinearLayout;
  36import android.widget.RelativeLayout;
  37import android.widget.TextView;
  38import android.widget.Toast;
  39
  40import java.lang.ref.WeakReference;
  41import java.net.URL;
  42import java.util.List;
  43import java.util.Locale;
  44import java.util.concurrent.RejectedExecutionException;
  45import java.util.regex.Matcher;
  46import java.util.regex.Pattern;
  47
  48import eu.siacs.conversations.Config;
  49import eu.siacs.conversations.R;
  50import eu.siacs.conversations.crypto.axolotl.FingerprintStatus;
  51import eu.siacs.conversations.entities.Account;
  52import eu.siacs.conversations.entities.Conversation;
  53import eu.siacs.conversations.entities.DownloadableFile;
  54import eu.siacs.conversations.entities.Message;
  55import eu.siacs.conversations.entities.Message.FileParams;
  56import eu.siacs.conversations.entities.Transferable;
  57import eu.siacs.conversations.persistance.FileBackend;
  58import eu.siacs.conversations.services.MessageArchiveService;
  59import eu.siacs.conversations.services.NotificationService;
  60import eu.siacs.conversations.ui.ConversationActivity;
  61import eu.siacs.conversations.ui.service.AudioPlayer;
  62import eu.siacs.conversations.ui.text.DividerSpan;
  63import eu.siacs.conversations.ui.text.QuoteSpan;
  64import eu.siacs.conversations.ui.widget.ClickableMovementMethod;
  65import eu.siacs.conversations.ui.widget.CopyTextView;
  66import eu.siacs.conversations.ui.widget.ListSelectionManager;
  67import eu.siacs.conversations.utils.CryptoHelper;
  68import eu.siacs.conversations.utils.Emoticons;
  69import eu.siacs.conversations.utils.GeoHelper;
  70import eu.siacs.conversations.utils.Patterns;
  71import eu.siacs.conversations.utils.StylingHelper;
  72import eu.siacs.conversations.utils.UIHelper;
  73import eu.siacs.conversations.xmpp.mam.MamReference;
  74
  75public class MessageAdapter extends ArrayAdapter<Message> implements CopyTextView.CopyHandler {
  76
  77	private static final int SENT = 0;
  78	private static final int RECEIVED = 1;
  79	private static final int STATUS = 2;
  80	private static final int DATE_SEPARATOR = 3;
  81
  82	public static final String DATE_SEPARATOR_BODY = "DATE_SEPARATOR";
  83
  84	private static final Pattern XMPP_PATTERN = Pattern
  85			.compile("xmpp\\:(?:(?:["
  86					+ Patterns.GOOD_IRI_CHAR
  87					+ "\\;\\/\\?\\@\\&\\=\\#\\~\\-\\.\\+\\!\\*\\'\\(\\)\\,\\_])"
  88					+ "|(?:\\%[a-fA-F0-9]{2}))+");
  89
  90	private static final Linkify.TransformFilter WEBURL_TRANSFORM_FILTER = new Linkify.TransformFilter() {
  91		@Override
  92		public String transformUrl(Matcher matcher, String url) {
  93			if (url == null) {
  94				return null;
  95			}
  96			final String lcUrl = url.toLowerCase(Locale.US);
  97			if (lcUrl.startsWith("http://") || lcUrl.startsWith("https://")) {
  98				return url;
  99			} else {
 100				return "http://"+url;
 101			}
 102		}
 103	};
 104	private static final Linkify.MatchFilter WEBURL_MATCH_FILTER = new Linkify.MatchFilter() {
 105		@Override
 106		public boolean acceptMatch(CharSequence cs, int start, int end) {
 107			return start < 1 || (cs.charAt(start-1) != '@' && cs.charAt(start-1) != '.' && !cs.subSequence(Math.max(0,start - 3),start).equals("://"));
 108		}
 109	};
 110
 111	private final ConversationActivity activity;
 112
 113	private DisplayMetrics metrics;
 114
 115	private OnContactPictureClicked mOnContactPictureClickedListener;
 116	private OnContactPictureLongClicked mOnContactPictureLongClickedListener;
 117
 118	private boolean mIndicateReceived = false;
 119	private boolean mUseGreenBackground = false;
 120
 121	private OnQuoteListener onQuoteListener;
 122
 123	private final ListSelectionManager listSelectionManager = new ListSelectionManager();
 124
 125	private final AudioPlayer audioPlayer;
 126
 127	public MessageAdapter(ConversationActivity activity, List<Message> messages) {
 128		super(activity, 0, messages);
 129		this.audioPlayer = new AudioPlayer(this);
 130		this.activity = activity;
 131		metrics = getContext().getResources().getDisplayMetrics();
 132		updatePreferences();
 133	}
 134
 135	public void setOnContactPictureClicked(OnContactPictureClicked listener) {
 136		this.mOnContactPictureClickedListener = listener;
 137	}
 138
 139	public void setOnContactPictureLongClicked(
 140			OnContactPictureLongClicked listener) {
 141		this.mOnContactPictureLongClickedListener = listener;
 142			}
 143
 144	public void setOnQuoteListener(OnQuoteListener listener) {
 145		this.onQuoteListener = listener;
 146	}
 147
 148	@Override
 149	public int getViewTypeCount() {
 150		return 4;
 151	}
 152
 153	public int getItemViewType(Message message) {
 154		if (message.getType() == Message.TYPE_STATUS) {
 155			if (DATE_SEPARATOR_BODY.equals(message.getBody())) {
 156				return DATE_SEPARATOR;
 157			} else {
 158				return STATUS;
 159			}
 160		} else if (message.getStatus() <= Message.STATUS_RECEIVED) {
 161			return RECEIVED;
 162		}
 163
 164		return SENT;
 165	}
 166
 167	@Override
 168	public int getItemViewType(int position) {
 169		return this.getItemViewType(getItem(position));
 170	}
 171
 172	public int getMessageTextColor(boolean onDark, boolean primary) {
 173		if (onDark) {
 174			return ContextCompat.getColor(activity, primary ? R.color.white : R.color.white70);
 175		} else {
 176			return ContextCompat.getColor(activity, primary ? R.color.black87 : R.color.black54);
 177		}
 178	}
 179
 180	private void displayStatus(ViewHolder viewHolder, Message message, int type, boolean darkBackground) {
 181		String filesize = null;
 182		String info = null;
 183		boolean error = false;
 184		if (viewHolder.indicatorReceived != null) {
 185			viewHolder.indicatorReceived.setVisibility(View.GONE);
 186		}
 187
 188		if (viewHolder.edit_indicator != null) {
 189			if (message.edited()) {
 190				viewHolder.edit_indicator.setVisibility(View.VISIBLE);
 191				viewHolder.edit_indicator.setImageResource(darkBackground ? R.drawable.ic_mode_edit_white_18dp : R.drawable.ic_mode_edit_black_18dp);
 192				viewHolder.edit_indicator.setAlpha(darkBackground ? 0.7f : 0.57f);
 193			} else {
 194				viewHolder.edit_indicator.setVisibility(View.GONE);
 195			}
 196		}
 197		boolean multiReceived = message.getConversation().getMode() == Conversation.MODE_MULTI
 198			&& message.getMergedStatus() <= Message.STATUS_RECEIVED;
 199		if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE || message.getTransferable() != null) {
 200			FileParams params = message.getFileParams();
 201			if (params.size > (1.5 * 1024 * 1024)) {
 202				filesize = Math.round(params.size * 1f/ (1024 * 1024))+ " MiB";
 203			} else if (params.size >= 1024) {
 204				filesize = Math.round(params.size * 1f/ 1024) + " KiB";
 205			} else if (params.size > 0){
 206				filesize = params.size + " B";
 207			}
 208			if (message.getTransferable() != null && message.getTransferable().getStatus() == Transferable.STATUS_FAILED) {
 209				error = true;
 210			}
 211		}
 212		switch (message.getMergedStatus()) {
 213			case Message.STATUS_WAITING:
 214				info = getContext().getString(R.string.waiting);
 215				break;
 216			case Message.STATUS_UNSEND:
 217				Transferable d = message.getTransferable();
 218				if (d!=null) {
 219					info = getContext().getString(R.string.sending_file,d.getProgress());
 220				} else {
 221					info = getContext().getString(R.string.sending);
 222				}
 223				break;
 224			case Message.STATUS_OFFERED:
 225				info = getContext().getString(R.string.offering);
 226				break;
 227			case Message.STATUS_SEND_RECEIVED:
 228				if (mIndicateReceived) {
 229					viewHolder.indicatorReceived.setVisibility(View.VISIBLE);
 230				}
 231				break;
 232			case Message.STATUS_SEND_DISPLAYED:
 233				if (mIndicateReceived) {
 234					viewHolder.indicatorReceived.setVisibility(View.VISIBLE);
 235				}
 236				break;
 237			case Message.STATUS_SEND_FAILED:
 238				info = getContext().getString(R.string.send_failed);
 239				error = true;
 240				break;
 241			default:
 242				if (multiReceived) {
 243					info = UIHelper.getMessageDisplayName(message);
 244				}
 245				break;
 246		}
 247		if (error && type == SENT) {
 248			viewHolder.time.setTextColor(activity.getWarningTextColor());
 249		} else {
 250			viewHolder.time.setTextColor(this.getMessageTextColor(darkBackground,false));
 251		}
 252		if (message.getEncryption() == Message.ENCRYPTION_NONE) {
 253			viewHolder.indicator.setVisibility(View.GONE);
 254		} else {
 255			boolean verified = false;
 256			if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
 257				final FingerprintStatus status = message.getConversation()
 258						.getAccount().getAxolotlService().getFingerprintTrust(
 259								message.getFingerprint());
 260				if (status != null && status.isVerified()) {
 261					verified = true;
 262				}
 263			}
 264			if (verified) {
 265				viewHolder.indicator.setImageResource(darkBackground ? R.drawable.ic_verified_user_white_18dp : R.drawable.ic_verified_user_black_18dp);
 266			} else {
 267				viewHolder.indicator.setImageResource(darkBackground ? R.drawable.ic_lock_white_18dp : R.drawable.ic_lock_black_18dp);
 268			}
 269			if (darkBackground) {
 270				viewHolder.indicator.setAlpha(0.7f);
 271			} else {
 272				viewHolder.indicator.setAlpha(0.57f);
 273			}
 274			viewHolder.indicator.setVisibility(View.VISIBLE);
 275		}
 276
 277		String formatedTime = UIHelper.readableTimeDifferenceFull(getContext(), message.getMergedTimeSent());
 278		if (message.getStatus() <= Message.STATUS_RECEIVED) {
 279			if ((filesize != null) && (info != null)) {
 280				viewHolder.time.setText(formatedTime + " \u00B7 " + filesize +" \u00B7 " + info);
 281			} else if ((filesize == null) && (info != null)) {
 282				viewHolder.time.setText(formatedTime + " \u00B7 " + info);
 283			} else if ((filesize != null) && (info == null)) {
 284				viewHolder.time.setText(formatedTime + " \u00B7 " + filesize);
 285			} else {
 286				viewHolder.time.setText(formatedTime);
 287			}
 288		} else {
 289			if ((filesize != null) && (info != null)) {
 290				viewHolder.time.setText(filesize + " \u00B7 " + info);
 291			} else if ((filesize == null) && (info != null)) {
 292				if (error) {
 293					viewHolder.time.setText(info + " \u00B7 " + formatedTime);
 294				} else {
 295					viewHolder.time.setText(info);
 296				}
 297			} else if ((filesize != null) && (info == null)) {
 298				viewHolder.time.setText(filesize + " \u00B7 " + formatedTime);
 299			} else {
 300				viewHolder.time.setText(formatedTime);
 301			}
 302		}
 303	}
 304
 305	private void displayInfoMessage(ViewHolder viewHolder, String text, boolean darkBackground) {
 306		viewHolder.download_button.setVisibility(View.GONE);
 307		viewHolder.audioPlayer.setVisibility(View.GONE);
 308		viewHolder.image.setVisibility(View.GONE);
 309		viewHolder.messageBody.setVisibility(View.VISIBLE);
 310		viewHolder.messageBody.setText(text);
 311		viewHolder.messageBody.setTextColor(getMessageTextColor(darkBackground, false));
 312		viewHolder.messageBody.setTypeface(null, Typeface.ITALIC);
 313		viewHolder.messageBody.setTextIsSelectable(false);
 314	}
 315
 316	private void displayDecryptionFailed(ViewHolder viewHolder, boolean darkBackground) {
 317		viewHolder.download_button.setVisibility(View.GONE);
 318		viewHolder.image.setVisibility(View.GONE);
 319		viewHolder.audioPlayer.setVisibility(View.GONE);
 320		viewHolder.messageBody.setVisibility(View.VISIBLE);
 321		viewHolder.messageBody.setText(getContext().getString(
 322				R.string.decryption_failed));
 323		viewHolder.messageBody.setTextColor(getMessageTextColor(darkBackground, false));
 324		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
 325		viewHolder.messageBody.setTextIsSelectable(false);
 326	}
 327
 328	private void displayEmojiMessage(final ViewHolder viewHolder, final String body) {
 329		viewHolder.download_button.setVisibility(View.GONE);
 330		viewHolder.audioPlayer.setVisibility(View.GONE);
 331		viewHolder.image.setVisibility(View.GONE);
 332		viewHolder.messageBody.setVisibility(View.VISIBLE);
 333		Spannable span = new SpannableString(body);
 334		float size = Emoticons.isEmoji(body) ? 3.0f : 2.0f;
 335		span.setSpan(new RelativeSizeSpan(size), 0, body.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 336		viewHolder.messageBody.setText(span);
 337	}
 338
 339	private int applyQuoteSpan(SpannableStringBuilder body, int start, int end, boolean darkBackground) {
 340		if (start > 1 && !"\n\n".equals(body.subSequence(start - 2, start).toString())) {
 341			body.insert(start++, "\n");
 342			body.setSpan(new DividerSpan(false), start - 2, start, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 343			end++;
 344		}
 345		if (end < body.length() - 1 && !"\n\n".equals(body.subSequence(end, end + 2).toString())) {
 346			body.insert(end, "\n");
 347			body.setSpan(new DividerSpan(false), end, end + 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 348		}
 349		int color = darkBackground ? this.getMessageTextColor(darkBackground, false)
 350				: ContextCompat.getColor(activity, R.color.bubble);
 351		DisplayMetrics metrics = getContext().getResources().getDisplayMetrics();
 352		body.setSpan(new QuoteSpan(color, metrics), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 353		return 0;
 354	}
 355
 356	/**
 357	 * Applies QuoteSpan to group of lines which starts with > or » characters.
 358	 * Appends likebreaks and applies DividerSpan to them to show a padding between quote and text.
 359	 */
 360	private boolean handleTextQuotes(SpannableStringBuilder body, boolean darkBackground) {
 361		boolean startsWithQuote = false;
 362		char previous = '\n';
 363		int lineStart = -1;
 364		int lineTextStart = -1;
 365		int quoteStart = -1;
 366		for (int i = 0; i <= body.length(); i++) {
 367			char current = body.length() > i ? body.charAt(i) : '\n';
 368			if (lineStart == -1) {
 369				if (previous == '\n') {
 370					if ((current == '>' && UIHelper.isPositionFollowedByQuoteableCharacter(body,i))
 371							|| current == '\u00bb' && !UIHelper.isPositionFollowedByQuote(body,i)) {
 372						// Line start with quote
 373						lineStart = i;
 374						if (quoteStart == -1) quoteStart = i;
 375						if (i == 0) startsWithQuote = true;
 376					} else if (quoteStart >= 0) {
 377						// Line start without quote, apply spans there
 378						applyQuoteSpan(body, quoteStart, i - 1, darkBackground);
 379						quoteStart = -1;
 380					}
 381				}
 382			} else {
 383				// Remove extra spaces between > and first character in the line
 384				// > character will be removed too
 385				if (current != ' ' && lineTextStart == -1) {
 386					lineTextStart = i;
 387				}
 388				if (current == '\n') {
 389					body.delete(lineStart, lineTextStart);
 390					i -= lineTextStart - lineStart;
 391					if (i == lineStart) {
 392						// Avoid empty lines because span over empty line can be hidden
 393						body.insert(i++, " ");
 394					}
 395					lineStart = -1;
 396					lineTextStart = -1;
 397				}
 398			}
 399			previous = current;
 400		}
 401		if (quoteStart >= 0) {
 402			// Apply spans to finishing open quote
 403			applyQuoteSpan(body, quoteStart, body.length(), darkBackground);
 404		}
 405		return startsWithQuote;
 406	}
 407
 408	private void displayTextMessage(final ViewHolder viewHolder, final Message message, boolean darkBackground, int type) {
 409		viewHolder.download_button.setVisibility(View.GONE);
 410		viewHolder.image.setVisibility(View.GONE);
 411		viewHolder.audioPlayer.setVisibility(View.GONE);
 412		viewHolder.messageBody.setVisibility(View.VISIBLE);
 413
 414		viewHolder.messageBody.setTextColor(this.getMessageTextColor(darkBackground, true));
 415		viewHolder.messageBody.setLinkTextColor(this.getMessageTextColor(darkBackground, true));
 416		viewHolder.messageBody.setHighlightColor(ContextCompat.getColor(activity, darkBackground
 417				? (type == SENT || !mUseGreenBackground ? R.color.black26 : R.color.grey800) : R.color.grey500));
 418		viewHolder.messageBody.setTypeface(null, Typeface.NORMAL);
 419
 420		if (message.getBody() != null) {
 421			final String nick = UIHelper.getMessageDisplayName(message);
 422			SpannableStringBuilder body = message.getMergedBody();
 423			boolean hasMeCommand = message.hasMeCommand();
 424			if (hasMeCommand) {
 425				body = body.replace(0, Message.ME_COMMAND.length(), nick + " ");
 426			}
 427			if (body.length() > Config.MAX_DISPLAY_MESSAGE_CHARS) {
 428				body = new SpannableStringBuilder(body, 0, Config.MAX_DISPLAY_MESSAGE_CHARS);
 429				body.append("\u2026");
 430			}
 431			Message.MergeSeparator[] mergeSeparators = body.getSpans(0, body.length(), Message.MergeSeparator.class);
 432			for (Message.MergeSeparator mergeSeparator : mergeSeparators) {
 433				int start = body.getSpanStart(mergeSeparator);
 434				int end = body.getSpanEnd(mergeSeparator);
 435				body.setSpan(new DividerSpan(true), start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 436			}
 437			boolean startsWithQuote = handleTextQuotes(body, darkBackground);
 438			if (message.getType() != Message.TYPE_PRIVATE) {
 439				if (hasMeCommand) {
 440					body.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), 0, nick.length(),
 441							Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 442				}
 443			} else {
 444				String privateMarker;
 445				if (message.getStatus() <= Message.STATUS_RECEIVED) {
 446					privateMarker = activity.getString(R.string.private_message);
 447				} else {
 448					final String to;
 449					if (message.getCounterpart() != null) {
 450						to = message.getCounterpart().getResourcepart();
 451					} else {
 452						to = "";
 453					}
 454					privateMarker = activity.getString(R.string.private_message_to, to);
 455				}
 456				body.insert(0, privateMarker);
 457				int privateMarkerIndex = privateMarker.length();
 458				if (startsWithQuote) {
 459					body.insert(privateMarkerIndex, "\n\n");
 460					body.setSpan(new DividerSpan(false), privateMarkerIndex, privateMarkerIndex + 2,
 461							Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 462				} else {
 463					body.insert(privateMarkerIndex, " ");
 464				}
 465				body.setSpan(new ForegroundColorSpan(getMessageTextColor(darkBackground, false)),
 466						0, privateMarkerIndex, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 467				body.setSpan(new StyleSpan(Typeface.BOLD),
 468						0, privateMarkerIndex, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 469				if (hasMeCommand) {
 470					body.setSpan(new StyleSpan(Typeface.BOLD_ITALIC), privateMarkerIndex + 1,
 471							privateMarkerIndex + 1 + nick.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 472				}
 473			}
 474			if (message.getConversation().getMode() == Conversation.MODE_MULTI && message.getStatus() == Message.STATUS_RECEIVED) {
 475				Pattern pattern = NotificationService.generateNickHighlightPattern(message.getConversation().getMucOptions().getActualNick());
 476				Matcher matcher = pattern.matcher(body);
 477				while(matcher.find()) {
 478					body.setSpan(new StyleSpan(Typeface.BOLD), matcher.start(), matcher.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 479				}
 480			}
 481			Matcher matcher = Emoticons.generatePattern(body).matcher(body);
 482			while(matcher.find()) {
 483				body.setSpan(new RelativeSizeSpan(1.2f), matcher.start(), matcher.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 484			}
 485
 486			StylingHelper.format(body, viewHolder.messageBody.getCurrentTextColor());
 487
 488			Linkify.addLinks(body, XMPP_PATTERN, "xmpp");
 489			Linkify.addLinks(body, Patterns.AUTOLINK_WEB_URL, "http", WEBURL_MATCH_FILTER, WEBURL_TRANSFORM_FILTER);
 490			Linkify.addLinks(body, GeoHelper.GEO_URI, "geo");
 491			viewHolder.messageBody.setAutoLinkMask(0);
 492			viewHolder.messageBody.setText(body);
 493			viewHolder.messageBody.setTextIsSelectable(true);
 494			viewHolder.messageBody.setMovementMethod(ClickableMovementMethod.getInstance());
 495			listSelectionManager.onUpdate(viewHolder.messageBody, message);
 496		} else {
 497			viewHolder.messageBody.setText("");
 498			viewHolder.messageBody.setTextIsSelectable(false);
 499		}
 500	}
 501
 502	private void displayDownloadableMessage(ViewHolder viewHolder, final Message message, String text) {
 503		viewHolder.image.setVisibility(View.GONE);
 504		viewHolder.messageBody.setVisibility(View.GONE);
 505		viewHolder.audioPlayer.setVisibility(View.GONE);
 506		viewHolder.download_button.setVisibility(View.VISIBLE);
 507		viewHolder.download_button.setText(text);
 508		viewHolder.download_button.setOnClickListener(new OnClickListener() {
 509
 510			@Override
 511			public void onClick(View v) {
 512				activity.startDownloadable(message);
 513			}
 514		});
 515	}
 516
 517	private void displayOpenableMessage(ViewHolder viewHolder,final Message message) {
 518		viewHolder.image.setVisibility(View.GONE);
 519		viewHolder.messageBody.setVisibility(View.GONE);
 520		viewHolder.audioPlayer.setVisibility(View.GONE);
 521		viewHolder.download_button.setVisibility(View.VISIBLE);
 522		viewHolder.download_button.setText(activity.getString(R.string.open_x_file, UIHelper.getFileDescriptionString(activity, message)));
 523		viewHolder.download_button.setOnClickListener(new OnClickListener() {
 524
 525			@Override
 526			public void onClick(View v) {
 527				openDownloadable(message);
 528			}
 529		});
 530	}
 531
 532	private void displayLocationMessage(ViewHolder viewHolder, final Message message) {
 533		viewHolder.image.setVisibility(View.GONE);
 534		viewHolder.messageBody.setVisibility(View.GONE);
 535		viewHolder.audioPlayer.setVisibility(View.GONE);
 536		viewHolder.download_button.setVisibility(View.VISIBLE);
 537		viewHolder.download_button.setText(R.string.show_location);
 538		viewHolder.download_button.setOnClickListener(new OnClickListener() {
 539
 540			@Override
 541			public void onClick(View v) {
 542				showLocation(message);
 543			}
 544		});
 545	}
 546
 547	private void displayAudioMessage(ViewHolder viewHolder, Message message, boolean darkBackground) {
 548		viewHolder.image.setVisibility(View.GONE);
 549		viewHolder.messageBody.setVisibility(View.GONE);
 550		viewHolder.download_button.setVisibility(View.GONE);
 551		final RelativeLayout audioPlayer = viewHolder.audioPlayer;
 552		audioPlayer.setVisibility(View.VISIBLE);
 553		AudioPlayer.ViewHolder.get(audioPlayer).setDarkBackground(darkBackground);
 554		this.audioPlayer.init(audioPlayer, message);
 555	}
 556
 557
 558	private void displayImageMessage(ViewHolder viewHolder, final Message message) {
 559		viewHolder.download_button.setVisibility(View.GONE);
 560		viewHolder.messageBody.setVisibility(View.GONE);
 561		viewHolder.audioPlayer.setVisibility(View.GONE);
 562		viewHolder.image.setVisibility(View.VISIBLE);
 563		FileParams params = message.getFileParams();
 564		double target = metrics.density * 288;
 565		int scaledW;
 566		int scaledH;
 567		if (Math.max(params.height, params.width) * metrics.density <= target) {
 568			scaledW = (int) (params.width * metrics.density);
 569			scaledH = (int) (params.height * metrics.density);
 570		} else if (Math.max(params.height,params.width) <= target) {
 571			scaledW = params.width;
 572			scaledH = params.height;
 573		} else if (params.width <= params.height) {
 574			scaledW = (int) (params.width / ((double) params.height / target));
 575			scaledH = (int) target;
 576		} else {
 577			scaledW = (int) target;
 578			scaledH = (int) (params.height / ((double) params.width / target));
 579		}
 580		LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(scaledW, scaledH);
 581		layoutParams.setMargins(0, (int) (metrics.density * 4), 0, (int) (metrics.density * 4));
 582		viewHolder.image.setLayoutParams(layoutParams);
 583		activity.loadBitmap(message, viewHolder.image);
 584		viewHolder.image.setOnClickListener(new OnClickListener() {
 585
 586			@Override
 587			public void onClick(View v) {
 588				openDownloadable(message);
 589			}
 590		});
 591	}
 592
 593	private void loadMoreMessages(Conversation conversation) {
 594		conversation.setLastClearHistory(0,null);
 595		activity.xmppConnectionService.updateConversation(conversation);
 596		conversation.setHasMessagesLeftOnServer(true);
 597		conversation.setFirstMamReference(null);
 598		long timestamp = conversation.getLastMessageTransmitted().getTimestamp();
 599		if (timestamp == 0) {
 600			timestamp = System.currentTimeMillis();
 601		}
 602		conversation.messagesLoaded.set(true);
 603		MessageArchiveService.Query query = activity.xmppConnectionService.getMessageArchiveService().query(conversation, new MamReference(0), timestamp, false);
 604		if (query != null) {
 605			Toast.makeText(activity, R.string.fetching_history_from_server, Toast.LENGTH_LONG).show();
 606		} else {
 607			Toast.makeText(activity,R.string.not_fetching_history_retention_period, Toast.LENGTH_SHORT).show();
 608		}
 609	}
 610
 611	@Override
 612	public View getView(int position, View view, ViewGroup parent) {
 613		final Message message = getItem(position);
 614		final boolean omemoEncryption = message.getEncryption() == Message.ENCRYPTION_AXOLOTL;
 615		final boolean isInValidSession = message.isValidInSession() && (!omemoEncryption || message.isTrusted());
 616		final Conversation conversation = message.getConversation();
 617		final Account account = conversation.getAccount();
 618		final int type = getItemViewType(position);
 619		ViewHolder viewHolder;
 620		if (view == null) {
 621			viewHolder = new ViewHolder();
 622			switch (type) {
 623				case DATE_SEPARATOR:
 624					view = activity.getLayoutInflater().inflate(R.layout.message_date_bubble, parent, false);
 625					viewHolder.status_message = (TextView) view.findViewById(R.id.message_body);
 626					viewHolder.message_box = (LinearLayout) view.findViewById(R.id.message_box);
 627					break;
 628				case SENT:
 629					view = activity.getLayoutInflater().inflate(
 630							R.layout.message_sent, parent, false);
 631					viewHolder.message_box = (LinearLayout) view
 632						.findViewById(R.id.message_box);
 633					viewHolder.contact_picture = (ImageView) view
 634						.findViewById(R.id.message_photo);
 635					viewHolder.download_button = (Button) view
 636						.findViewById(R.id.download_button);
 637					viewHolder.indicator = (ImageView) view
 638						.findViewById(R.id.security_indicator);
 639					viewHolder.edit_indicator = (ImageView) view.findViewById(R.id.edit_indicator);
 640					viewHolder.image = (ImageView) view
 641						.findViewById(R.id.message_image);
 642					viewHolder.messageBody = (CopyTextView) view
 643						.findViewById(R.id.message_body);
 644					viewHolder.time = (TextView) view
 645						.findViewById(R.id.message_time);
 646					viewHolder.indicatorReceived = (ImageView) view
 647						.findViewById(R.id.indicator_received);
 648					viewHolder.audioPlayer = (RelativeLayout) view.findViewById(R.id.audio_player);
 649					break;
 650				case RECEIVED:
 651					view = activity.getLayoutInflater().inflate(
 652							R.layout.message_received, parent, false);
 653					viewHolder.message_box = (LinearLayout) view
 654						.findViewById(R.id.message_box);
 655					viewHolder.contact_picture = (ImageView) view
 656						.findViewById(R.id.message_photo);
 657					viewHolder.download_button = (Button) view
 658						.findViewById(R.id.download_button);
 659					viewHolder.indicator = (ImageView) view
 660						.findViewById(R.id.security_indicator);
 661					viewHolder.edit_indicator = (ImageView) view.findViewById(R.id.edit_indicator);
 662					viewHolder.image = (ImageView) view
 663						.findViewById(R.id.message_image);
 664					viewHolder.messageBody = (CopyTextView) view
 665						.findViewById(R.id.message_body);
 666					viewHolder.time = (TextView) view
 667						.findViewById(R.id.message_time);
 668					viewHolder.indicatorReceived = (ImageView) view
 669						.findViewById(R.id.indicator_received);
 670					viewHolder.encryption = (TextView) view.findViewById(R.id.message_encryption);
 671					viewHolder.audioPlayer = (RelativeLayout) view.findViewById(R.id.audio_player);
 672					break;
 673				case STATUS:
 674					view = activity.getLayoutInflater().inflate(R.layout.message_status, parent, false);
 675					viewHolder.contact_picture = (ImageView) view.findViewById(R.id.message_photo);
 676					viewHolder.status_message = (TextView) view.findViewById(R.id.status_message);
 677					viewHolder.load_more_messages = (Button) view.findViewById(R.id.load_more_messages);
 678					break;
 679				default:
 680					throw new AssertionError("Unknown view type");
 681			}
 682			if (viewHolder.messageBody != null) {
 683				listSelectionManager.onCreate(viewHolder.messageBody,
 684						new MessageBodyActionModeCallback(viewHolder.messageBody));
 685				viewHolder.messageBody.setCopyHandler(this);
 686			}
 687			view.setTag(viewHolder);
 688		} else {
 689			viewHolder = (ViewHolder) view.getTag();
 690			if (viewHolder == null) {
 691				return view;
 692			}
 693		}
 694
 695		boolean darkBackground = type == RECEIVED && (!isInValidSession || mUseGreenBackground) || activity.isDarkTheme();
 696
 697		if (type == DATE_SEPARATOR) {
 698			if (UIHelper.today(message.getTimeSent())) {
 699				viewHolder.status_message.setText(R.string.today);
 700			} else if (UIHelper.yesterday(message.getTimeSent())) {
 701				viewHolder.status_message.setText(R.string.yesterday);
 702			} else {
 703				viewHolder.status_message.setText(DateUtils.formatDateTime(activity,message.getTimeSent(),DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_SHOW_YEAR));
 704			}
 705			viewHolder.message_box.setBackgroundResource(activity.isDarkTheme() ? R.drawable.date_bubble_grey : R.drawable.date_bubble_white);
 706			viewHolder.status_message.setTextColor(activity.getSecondaryTextColor());
 707			return view;
 708		} else if (type == STATUS) {
 709			if ("LOAD_MORE".equals(message.getBody())) {
 710				viewHolder.status_message.setVisibility(View.GONE);
 711				viewHolder.contact_picture.setVisibility(View.GONE);
 712				viewHolder.load_more_messages.setVisibility(View.VISIBLE);
 713				viewHolder.load_more_messages.setOnClickListener(new OnClickListener() {
 714					@Override
 715					public void onClick(View v) {
 716						loadMoreMessages(message.getConversation());
 717					}
 718				});
 719			} else {
 720				viewHolder.status_message.setVisibility(View.VISIBLE);
 721				viewHolder.load_more_messages.setVisibility(View.GONE);
 722				viewHolder.status_message.setText(message.getBody());
 723				boolean showAvatar;
 724				if (conversation.getMode() == Conversation.MODE_SINGLE) {
 725					showAvatar = true;
 726					loadAvatar(message,viewHolder.contact_picture,activity.getPixel(32));
 727				} else if (message.getCounterpart() != null ){
 728					showAvatar = true;
 729					loadAvatar(message,viewHolder.contact_picture,activity.getPixel(32));
 730				} else {
 731					showAvatar = false;
 732				}
 733				if (showAvatar) {
 734					viewHolder.contact_picture.setAlpha(0.5f);
 735					viewHolder.contact_picture.setVisibility(View.VISIBLE);
 736				} else {
 737					viewHolder.contact_picture.setVisibility(View.GONE);
 738				}
 739			}
 740			return view;
 741		} else {
 742			loadAvatar(message, viewHolder.contact_picture,activity.getPixel(48));
 743		}
 744
 745		viewHolder.contact_picture
 746			.setOnClickListener(new OnClickListener() {
 747
 748				@Override
 749				public void onClick(View v) {
 750					if (MessageAdapter.this.mOnContactPictureClickedListener != null) {
 751						MessageAdapter.this.mOnContactPictureClickedListener
 752								.onContactPictureClicked(message);
 753					}
 754
 755				}
 756			});
 757		viewHolder.contact_picture
 758			.setOnLongClickListener(new OnLongClickListener() {
 759
 760				@Override
 761				public boolean onLongClick(View v) {
 762					if (MessageAdapter.this.mOnContactPictureLongClickedListener != null) {
 763						MessageAdapter.this.mOnContactPictureLongClickedListener
 764								.onContactPictureLongClicked(message);
 765						return true;
 766					} else {
 767						return false;
 768					}
 769				}
 770			});
 771
 772		final Transferable transferable = message.getTransferable();
 773		if (transferable != null && transferable.getStatus() != Transferable.STATUS_UPLOADING) {
 774			if (transferable.getStatus() == Transferable.STATUS_OFFER) {
 775				displayDownloadableMessage(viewHolder,message,activity.getString(R.string.download_x_file, UIHelper.getFileDescriptionString(activity, message)));
 776			} else if (transferable.getStatus() == Transferable.STATUS_OFFER_CHECK_FILESIZE) {
 777				displayDownloadableMessage(viewHolder, message, activity.getString(R.string.check_x_filesize, UIHelper.getFileDescriptionString(activity, message)));
 778			} else {
 779				displayInfoMessage(viewHolder, UIHelper.getMessagePreview(activity, message).first,darkBackground);
 780			}
 781		} else if (message.getType() == Message.TYPE_IMAGE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
 782			displayImageMessage(viewHolder, message);
 783		} else if (message.getType() == Message.TYPE_FILE && message.getEncryption() != Message.ENCRYPTION_PGP && message.getEncryption() != Message.ENCRYPTION_DECRYPTION_FAILED) {
 784			if (message.getFileParams().width > 0 && message.getFileParams().height > 0) {
 785				displayImageMessage(viewHolder, message);
 786			} else if (message.getFileParams().runtime > 0) {
 787				displayAudioMessage(viewHolder, message, darkBackground);
 788			} else {
 789				displayOpenableMessage(viewHolder, message);
 790			}
 791		} else if (message.getEncryption() == Message.ENCRYPTION_PGP) {
 792			if (account.isPgpDecryptionServiceConnected()) {
 793				if (!account.hasPendingPgpIntent(conversation)) {
 794					displayInfoMessage(viewHolder, activity.getString(R.string.message_decrypting), darkBackground);
 795				} else {
 796					displayInfoMessage(viewHolder, activity.getString(R.string.pgp_message), darkBackground);
 797				}
 798			} else {
 799				displayInfoMessage(viewHolder,activity.getString(R.string.install_openkeychain),darkBackground);
 800				viewHolder.message_box.setOnClickListener(new OnClickListener() {
 801
 802							@Override
 803							public void onClick(View v) {
 804								activity.showInstallPgpDialog();
 805							}
 806						});
 807			}
 808		} else if (message.getEncryption() == Message.ENCRYPTION_DECRYPTION_FAILED) {
 809			displayDecryptionFailed(viewHolder,darkBackground);
 810		} else {
 811			if (message.isGeoUri()) {
 812				displayLocationMessage(viewHolder,message);
 813			} else if (message.bodyIsOnlyEmojis() && message.getType() != Message.TYPE_PRIVATE) {
 814				displayEmojiMessage(viewHolder, message.getBody().trim());
 815			} else if (message.treatAsDownloadable()) {
 816				try {
 817					URL url = new URL(message.getBody());
 818					displayDownloadableMessage(viewHolder,
 819							message,
 820							activity.getString(R.string.check_x_filesize_on_host,
 821									UIHelper.getFileDescriptionString(activity, message),
 822									url.getHost()));
 823				} catch (Exception e) {
 824					displayDownloadableMessage(viewHolder,
 825							message,
 826							activity.getString(R.string.check_x_filesize,
 827									UIHelper.getFileDescriptionString(activity, message)));
 828				}
 829			} else {
 830				displayTextMessage(viewHolder, message, darkBackground, type);
 831			}
 832		}
 833
 834		if (type == RECEIVED) {
 835			if(isInValidSession) {
 836				int bubble;
 837				if (!mUseGreenBackground) {
 838					bubble = activity.getThemeResource(R.attr.message_bubble_received_monochrome, R.drawable.message_bubble_received_white);
 839				} else {
 840					bubble = activity.getThemeResource(R.attr.message_bubble_received_green, R.drawable.message_bubble_received);
 841				}
 842				viewHolder.message_box.setBackgroundResource(bubble);
 843				viewHolder.encryption.setVisibility(View.GONE);
 844			} else {
 845				viewHolder.message_box.setBackgroundResource(R.drawable.message_bubble_received_warning);
 846				viewHolder.encryption.setVisibility(View.VISIBLE);
 847				if (omemoEncryption && !message.isTrusted()) {
 848					viewHolder.encryption.setText(R.string.not_trusted);
 849				} else {
 850					viewHolder.encryption.setText(CryptoHelper.encryptionTypeToText(message.getEncryption()));
 851				}
 852			}
 853		}
 854
 855		displayStatus(viewHolder, message, type, darkBackground);
 856
 857		return view;
 858	}
 859
 860	@Override
 861	public void notifyDataSetChanged() {
 862		listSelectionManager.onBeforeNotifyDataSetChanged();
 863		super.notifyDataSetChanged();
 864		listSelectionManager.onAfterNotifyDataSetChanged();
 865	}
 866
 867	private String transformText(CharSequence text, int start, int end, boolean forCopy) {
 868		SpannableStringBuilder builder = new SpannableStringBuilder(text);
 869		Object copySpan = new Object();
 870		builder.setSpan(copySpan, start, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
 871		DividerSpan[] dividerSpans = builder.getSpans(0, builder.length(), DividerSpan.class);
 872		for (DividerSpan dividerSpan : dividerSpans) {
 873			builder.replace(builder.getSpanStart(dividerSpan), builder.getSpanEnd(dividerSpan),
 874					dividerSpan.isLarge() ? "\n\n" : "\n");
 875		}
 876		start = builder.getSpanStart(copySpan);
 877		end = builder.getSpanEnd(copySpan);
 878		if (start == -1 || end == -1) return "";
 879		builder = new SpannableStringBuilder(builder, start, end);
 880		if (forCopy) {
 881			QuoteSpan[] quoteSpans = builder.getSpans(0, builder.length(), QuoteSpan.class);
 882			for (QuoteSpan quoteSpan : quoteSpans) {
 883				builder.insert(builder.getSpanStart(quoteSpan), "> ");
 884			}
 885		}
 886		return builder.toString();
 887	}
 888
 889	@Override
 890	public String transformTextForCopy(CharSequence text, int start, int end) {
 891		if (text instanceof Spanned) {
 892			return transformText(text, start, end, true);
 893		} else {
 894			return text.toString().substring(start, end);
 895		}
 896	}
 897
 898	public FileBackend getFileBackend() {
 899		return activity.xmppConnectionService.getFileBackend();
 900	}
 901
 902	public void stopAudioPlayer() {
 903		audioPlayer.stop();
 904	}
 905
 906	public interface OnQuoteListener {
 907		public void onQuote(String text);
 908	}
 909
 910	private class MessageBodyActionModeCallback implements ActionMode.Callback {
 911
 912		private final TextView textView;
 913
 914		public MessageBodyActionModeCallback(TextView textView) {
 915			this.textView = textView;
 916		}
 917
 918		@Override
 919		public boolean onCreateActionMode(ActionMode mode, Menu menu) {
 920			if (onQuoteListener != null) {
 921				int quoteResId = activity.getThemeResource(R.attr.icon_quote, R.drawable.ic_action_reply);
 922				// 3rd item is placed after "copy" item
 923				menu.add(0, android.R.id.button1, 3, R.string.quote).setIcon(quoteResId)
 924						.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
 925			}
 926			return false;
 927		}
 928
 929		@Override
 930		public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
 931			return false;
 932		}
 933
 934		@Override
 935		public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
 936			if (item.getItemId() == android.R.id.button1) {
 937				int start = textView.getSelectionStart();
 938				int end = textView.getSelectionEnd();
 939				if (end > start) {
 940					String text = transformText(textView.getText(), start, end, false);
 941					if (onQuoteListener != null) {
 942						onQuoteListener.onQuote(text);
 943					}
 944					mode.finish();
 945				}
 946				return true;
 947			}
 948			return false;
 949		}
 950
 951		@Override
 952		public void onDestroyActionMode(ActionMode mode) {}
 953	}
 954
 955	public void openDownloadable(Message message) {
 956		DownloadableFile file = activity.xmppConnectionService.getFileBackend().getFile(message);
 957		if (!file.exists()) {
 958			Toast.makeText(activity,R.string.file_deleted,Toast.LENGTH_SHORT).show();
 959			return;
 960		}
 961		Intent openIntent = new Intent(Intent.ACTION_VIEW);
 962		String mime = file.getMimeType();
 963		if (mime == null) {
 964			mime = "*/*";
 965		}
 966		Uri uri;
 967		try {
 968			uri = FileBackend.getUriForFile(activity, file);
 969		} catch (SecurityException e) {
 970			Toast.makeText(activity, activity.getString(R.string.no_permission_to_access_x, file.getAbsolutePath()), Toast.LENGTH_SHORT).show();
 971			return;
 972		}
 973		openIntent.setDataAndType(uri, mime);
 974		openIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
 975		PackageManager manager = activity.getPackageManager();
 976		List<ResolveInfo> info = manager.queryIntentActivities(openIntent, 0);
 977		if (info.size() == 0) {
 978			openIntent.setDataAndType(uri,"*/*");
 979		}
 980		try {
 981			getContext().startActivity(openIntent);
 982		}  catch (ActivityNotFoundException e) {
 983			Toast.makeText(activity,R.string.no_application_found_to_open_file,Toast.LENGTH_SHORT).show();
 984		}
 985	}
 986
 987	public void showLocation(Message message) {
 988		for(Intent intent : GeoHelper.createGeoIntentsFromMessage(message)) {
 989			if (intent.resolveActivity(getContext().getPackageManager()) != null) {
 990				getContext().startActivity(intent);
 991				return;
 992			}
 993		}
 994		Toast.makeText(activity,R.string.no_application_found_to_display_location,Toast.LENGTH_SHORT).show();
 995	}
 996
 997	public void updatePreferences() {
 998		this.mIndicateReceived = activity.indicateReceived();
 999		this.mUseGreenBackground = activity.useGreenBackground();
1000	}
1001
1002	public TextView getMessageBody(View view) {
1003		final Object tag = view.getTag();
1004		if (tag instanceof ViewHolder) {
1005			final ViewHolder viewHolder = (ViewHolder) tag;
1006			return viewHolder.messageBody;
1007		}
1008		return null;
1009	}
1010
1011	public interface OnContactPictureClicked {
1012		void onContactPictureClicked(Message message);
1013	}
1014
1015	public interface OnContactPictureLongClicked {
1016		void onContactPictureLongClicked(Message message);
1017	}
1018
1019	private static class ViewHolder {
1020
1021		protected LinearLayout message_box;
1022		protected Button download_button;
1023		protected ImageView image;
1024		protected ImageView indicator;
1025		protected ImageView indicatorReceived;
1026		protected TextView time;
1027		protected CopyTextView messageBody;
1028		protected ImageView contact_picture;
1029		protected TextView status_message;
1030		protected TextView encryption;
1031		public Button load_more_messages;
1032		public ImageView edit_indicator;
1033		public RelativeLayout audioPlayer;
1034	}
1035
1036	class BitmapWorkerTask extends AsyncTask<Message, Void, Bitmap> {
1037		private final WeakReference<ImageView> imageViewReference;
1038		private Message message = null;
1039		private final int size;
1040
1041		public BitmapWorkerTask(ImageView imageView, int size) {
1042			imageViewReference = new WeakReference<>(imageView);
1043			this.size = size;
1044		}
1045
1046		@Override
1047		protected Bitmap doInBackground(Message... params) {
1048			return activity.avatarService().get(params[0], size, isCancelled());
1049		}
1050
1051		@Override
1052		protected void onPostExecute(Bitmap bitmap) {
1053			if (bitmap != null && !isCancelled()) {
1054				final ImageView imageView = imageViewReference.get();
1055				if (imageView != null) {
1056					imageView.setImageBitmap(bitmap);
1057					imageView.setBackgroundColor(0x00000000);
1058				}
1059			}
1060		}
1061	}
1062
1063	public void loadAvatar(Message message, ImageView imageView, int size) {
1064		if (cancelPotentialWork(message, imageView)) {
1065			final Bitmap bm = activity.avatarService().get(message, size, true);
1066			if (bm != null) {
1067				cancelPotentialWork(message, imageView);
1068				imageView.setImageBitmap(bm);
1069				imageView.setBackgroundColor(0x00000000);
1070			} else {
1071				imageView.setBackgroundColor(UIHelper.getColorForName(UIHelper.getMessageDisplayName(message)));
1072				imageView.setImageDrawable(null);
1073				final BitmapWorkerTask task = new BitmapWorkerTask(imageView, size);
1074				final AsyncDrawable asyncDrawable = new AsyncDrawable(activity.getResources(), null, task);
1075				imageView.setImageDrawable(asyncDrawable);
1076				try {
1077					task.execute(message);
1078				} catch (final RejectedExecutionException ignored) {
1079				}
1080			}
1081		}
1082	}
1083
1084	public static boolean cancelPotentialWork(Message message, ImageView imageView) {
1085		final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
1086
1087		if (bitmapWorkerTask != null) {
1088			final Message oldMessage = bitmapWorkerTask.message;
1089			if (oldMessage == null || message != oldMessage) {
1090				bitmapWorkerTask.cancel(true);
1091			} else {
1092				return false;
1093			}
1094		}
1095		return true;
1096	}
1097
1098	private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
1099		if (imageView != null) {
1100			final Drawable drawable = imageView.getDrawable();
1101			if (drawable instanceof AsyncDrawable) {
1102				final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
1103				return asyncDrawable.getBitmapWorkerTask();
1104			}
1105		}
1106		return null;
1107	}
1108
1109	static class AsyncDrawable extends BitmapDrawable {
1110		private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;
1111
1112		public AsyncDrawable(Resources res, Bitmap bitmap, BitmapWorkerTask bitmapWorkerTask) {
1113			super(res, bitmap);
1114			bitmapWorkerTaskReference = new WeakReference<>(bitmapWorkerTask);
1115		}
1116
1117		public BitmapWorkerTask getBitmapWorkerTask() {
1118			return bitmapWorkerTaskReference.get();
1119		}
1120	}
1121}