src/com/owncloud/android/utils/UriUtils.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012-2014 ownCloud Inc.
   3  *
   4  *   This program is free software: you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License version 2,
   6  *   as published by the Free Software Foundation.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  *
  13  *   You should have received a copy of the GNU General Public License
  14  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  */
  17
  18 package com.owncloud.android.utils;
  19
  20 import android.content.Context;
  21 import android.database.Cursor;
  22 import android.net.Uri;
  23
  24
  25 /**
  26  * A helper class for some Uri operations.
  27  */
  28 public class UriUtils {
  29
  30     public static final String URI_CONTENT_SCHEME = "content://";
  31
  32
  33     /**
  34      * Get the value of the data column for this Uri. This is useful for
  35      * MediaStore Uris, and other file-based ContentProviders.
  36      *
  37      * @param context The context.
  38      * @param uri The Uri to query.
  39      * @param selection (Optional) Filter used in the query.
  40      * @param selectionArgs (Optional) Selection arguments used in the query.
  41      * @return The value of the _data column, which is typically a file path.
  42      */
  43     public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
  44
  45         Cursor cursor = null;
  46         final String column = "_data";
  47         final String[] projection = { column };
  48
  49         try {
  50             cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
  51             if (cursor != null && cursor.moveToFirst()) {
  52
  53                 final int column_index = cursor.getColumnIndexOrThrow(column);
  54                 return cursor.getString(column_index);
  55             }
  56         } finally {
  57             if (cursor != null)
  58                 cursor.close();
  59         }
  60         return null;
  61     }
  62
  63     /**
  64      * @param uri The Uri to check.
  65      * @return Whether the Uri authority is ExternalStorageProvider.
  66      */
  67     public static boolean isExternalStorageDocument(Uri uri) {
  68         return "com.android.externalstorage.documents".equals(uri.getAuthority());
  69     }
  70
  71     /**
  72      * @param uri The Uri to check.
  73      * @return Whether the Uri authority is DownloadsProvider.
  74      */
  75     public static boolean isDownloadsDocument(Uri uri) {
  76         return "com.android.providers.downloads.documents".equals(uri.getAuthority());
  77     }
  78
  79     /**
  80      * @param uri The Uri to check.
  81      * @return Whether the Uri authority is MediaProvider.
  82      */
  83     public static boolean isMediaDocument(Uri uri) {
  84         return "com.android.providers.media.documents".equals(uri.getAuthority());
  85     }
  86
  87     /**
  88      * @param uri The Uri to check.
  89      * @return Whether the Uri authority is Google Photos.
  90      */
  91     public static boolean isGooglePhotosUri(Uri uri) {
  92         return "com.google.android.apps.photos.content".equals(uri.getAuthority());
  93     }
  94
  95     /**
  96      *
  97      * @param uri The Uri to check.
  98      * @return Whether the Uri is from a content provider as kind "content://..."
  99      */
 100     public static boolean isContentDocument(Uri uri) {
 101         return uri.toString().startsWith(URI_CONTENT_SCHEME);
 102     }
 103 }