1package eu.siacs.conversations.utils;
2
3import android.annotation.SuppressLint;
4import android.content.ContentUris;
5import android.content.Context;
6import android.database.Cursor;
7import android.net.Uri;
8import android.os.Build;
9import android.os.Environment;
10import android.provider.DocumentsContract;
11import android.provider.MediaStore;
12
13import java.io.File;
14
15public class FileUtils {
16
17 /**
18 * Get a file path from a Uri. This will get the the path for Storage Access
19 * Framework Documents, as well as the _data field for the MediaStore and
20 * other file-based ContentProviders.
21 *
22 * @param context The context.
23 * @param uri The Uri to query.
24 * @author paulburke
25 */
26 @SuppressLint("NewApi")
27 public static String getPath(final Context context, final Uri uri) {
28 if (uri == null) {
29 return null;
30 }
31
32 final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
33
34 // DocumentProvider
35 if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
36 // ExternalStorageProvider
37 if (isExternalStorageDocument(uri)) {
38 final String docId = DocumentsContract.getDocumentId(uri);
39 final String[] split = docId.split(":");
40 final String type = split[0];
41
42 if ("primary".equalsIgnoreCase(type)) {
43 return Environment.getExternalStorageDirectory() + "/" + split[1];
44 }
45
46 // TODO handle non-primary volumes
47 }
48 // DownloadsProvider
49 else if (isDownloadsDocument(uri)) {
50
51 final String id = DocumentsContract.getDocumentId(uri);
52 final Uri contentUri = ContentUris.withAppendedId(
53 Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));
54
55 return getDataColumn(context, contentUri, null, null);
56 }
57 // MediaProvider
58 else if (isMediaDocument(uri)) {
59 final String docId = DocumentsContract.getDocumentId(uri);
60 final String[] split = docId.split(":");
61 final String type = split[0];
62
63 Uri contentUri = null;
64 if ("image".equals(type)) {
65 contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
66 } else if ("video".equals(type)) {
67 contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
68 } else if ("audio".equals(type)) {
69 contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
70 }
71
72 final String selection = "_id=?";
73 final String[] selectionArgs = new String[]{
74 split[1]
75 };
76
77 return getDataColumn(context, contentUri, selection, selectionArgs);
78 }
79 }
80 // MediaStore (and general)
81 else if ("content".equalsIgnoreCase(uri.getScheme())) {
82 String path = getDataColumn(context, uri, null, null);
83 if (path != null) {
84 File file = new File(path);
85 if (!file.canRead()) {
86 return null;
87 }
88 }
89 return path;
90 }
91 // File
92 else if ("file".equalsIgnoreCase(uri.getScheme())) {
93 return uri.getPath();
94 }
95
96 return null;
97 }
98
99 /**
100 * Get the value of the data column for this Uri. This is useful for
101 * MediaStore Uris, and other file-based ContentProviders.
102 *
103 * @param context The context.
104 * @param uri The Uri to query.
105 * @param selection (Optional) Filter used in the query.
106 * @param selectionArgs (Optional) Selection arguments used in the query.
107 * @return The value of the _data column, which is typically a file path.
108 */
109 public static String getDataColumn(Context context, Uri uri, String selection,
110 String[] selectionArgs) {
111
112 Cursor cursor = null;
113 final String column = "_data";
114 final String[] projection = {
115 column
116 };
117
118 try {
119 cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,null);
120 if (cursor != null && cursor.moveToFirst()) {
121 final int column_index = cursor.getColumnIndexOrThrow(column);
122 return cursor.getString(column_index);
123 }
124 } catch(Exception e) {
125 return null;
126 } finally {
127 if (cursor != null) {
128 cursor.close();
129 }
130 }
131 return null;
132 }
133
134
135 /**
136 * @param uri The Uri to check.
137 * @return Whether the Uri authority is ExternalStorageProvider.
138 */
139 public static boolean isExternalStorageDocument(Uri uri) {
140 return "com.android.externalstorage.documents".equals(uri.getAuthority());
141 }
142
143 /**
144 * @param uri The Uri to check.
145 * @return Whether the Uri authority is DownloadsProvider.
146 */
147 public static boolean isDownloadsDocument(Uri uri) {
148 return "com.android.providers.downloads.documents".equals(uri.getAuthority());
149 }
150
151 /**
152 * @param uri The Uri to check.
153 * @return Whether the Uri authority is MediaProvider.
154 */
155 public static boolean isMediaDocument(Uri uri) {
156 return "com.android.providers.media.documents".equals(uri.getAuthority());
157 }
158}