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

   1 /**
   2  *   ownCloud Android client application
   3  *
   4  *   Copyright (C) 2015 ownCloud Inc.
   5  *
   6  *   This program is free software: you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License version 2,
   8  *   as published by the Free Software Foundation.
   9  *
  10  *   This program is distributed in the hope that it will be useful,
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *   GNU General Public License for more details.
  14  *
  15  *   You should have received a copy of the GNU General Public License
  16  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 package com.owncloud.android.utils;
  21
  22 import android.content.Context;
  23 import android.database.Cursor;
  24 import android.net.Uri;
  25
  26
  27 /**
  28  * A helper class for some Uri operations.
  29  */
  30 public class UriUtils {
  31
  32     public static final String URI_CONTENT_SCHEME = "content://";
  33
  34
  35     /**
  36      * Get the value of the data column for this Uri. This is useful for
  37      * MediaStore Uris, and other file-based ContentProviders.
  38      *
  39      * @param context The context.
  40      * @param uri The Uri to query.
  41      * @param selection (Optional) Filter used in the query.
  42      * @param selectionArgs (Optional) Selection arguments used in the query.
  43      * @return The value of the _data column, which is typically a file path.
  44      */
  45     public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
  46
  47         Cursor cursor = null;
  48         final String column = "_data";
  49         final String[] projection = { column };
  50
  51         try {
  52             cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
  53             if (cursor != null && cursor.moveToFirst()) {
  54
  55                 final int column_index = cursor.getColumnIndexOrThrow(column);
  56                 return cursor.getString(column_index);
  57             }
  58         } finally {
  59             if (cursor != null)
  60                 cursor.close();
  61         }
  62         return null;
  63     }
  64
  65     /**
  66      * @param uri The Uri to check.
  67      * @return Whether the Uri authority is ExternalStorageProvider.
  68      */
  69     public static boolean isExternalStorageDocument(Uri uri) {
  70         return "com.android.externalstorage.documents".equals(uri.getAuthority());
  71     }
  72
  73     /**
  74      * @param uri The Uri to check.
  75      * @return Whether the Uri authority is DownloadsProvider.
  76      */
  77     public static boolean isDownloadsDocument(Uri uri) {
  78         return "com.android.providers.downloads.documents".equals(uri.getAuthority());
  79     }
  80
  81     /**
  82      * @param uri The Uri to check.
  83      * @return Whether the Uri authority is MediaProvider.
  84      */
  85     public static boolean isMediaDocument(Uri uri) {
  86         return "com.android.providers.media.documents".equals(uri.getAuthority());
  87     }
  88
  89     /**
  90      * @param uri The Uri to check.
  91      * @return Whether the Uri authority is Google Photos.
  92      */
  93     public static boolean isGooglePhotosUri(Uri uri) {
  94         return "com.google.android.apps.photos.content".equals(uri.getAuthority());
  95     }
  96
  97     /**
  98      *
  99      * @param uri The Uri to check.
 100      * @return Whether the Uri is from a content provider as kind "content://..."
 101      */
 102     public static boolean isContentDocument(Uri uri) {
 103         return uri.toString().startsWith(URI_CONTENT_SCHEME);
 104     }
 105 }