Include impelementation of Storage Access Framework when device is KITKAT or over

src/com/owncloud/android/ui/activity/FileDisplayActivity.java

@@ -31,6 +31,7 @@ import android.app.ProgressDialog;
 import android.content.BroadcastReceiver;
 import android.content.ComponentName;
 import android.content.ContentResolver;
+import android.content.ContentUris;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
@@ -41,9 +42,12 @@ import android.content.SyncRequest;
 import android.content.res.Resources.NotFoundException;
 import android.database.Cursor;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
+import android.os.Environment;
 import android.os.IBinder;
 import android.preference.PreferenceManager;
+import android.provider.DocumentsContract;
 import android.provider.MediaStore;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
@@ -866,25 +870,144 @@ OnSslUntrustedCertListener, OnEnforceableRefreshListener {
         return dialog;
     }
 
-
     /**
-     * Translates a content URI of an image to a physical path
-     * on the disk
+     * Translates a content URI of an content to a physical path on the disk
+     * 
      * @param uri The URI to resolve
-     * @return The path to the image or null if it could not be found
+     * @return The path to the content or null if it could not be found
      */
     public String getPath(Uri uri) {
-        String[] projection = { MediaStore.Images.Media.DATA };
-        Cursor cursor = managedQuery(uri, projection, null, null, null);
-        if (cursor != null) {
-            int column_index = cursor
-                    .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
-            cursor.moveToFirst();
-            return cursor.getString(column_index);
+        final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
+
+        // DocumentProvider
+        if (isKitKat && DocumentsContract.isDocumentUri(getApplicationContext(), uri)) {
+            // ExternalStorageProvider
+            if (isExternalStorageDocument(uri)) {
+                final String docId = DocumentsContract.getDocumentId(uri);
+                final String[] split = docId.split(":");
+                final String type = split[0];
+
+                if ("primary".equalsIgnoreCase(type)) {
+                    return Environment.getExternalStorageDirectory() + "/" + split[1];
+                }
+            }
+            // DownloadsProvider
+            else if (isDownloadsDocument(uri)) {
+
+                final String id = DocumentsContract.getDocumentId(uri);
+                final Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"),
+                        Long.valueOf(id));
+
+                return getDataColumn(getApplicationContext(), contentUri, null, null);
+            }
+            // MediaProvider
+            else if (isMediaDocument(uri)) {
+                final String docId = DocumentsContract.getDocumentId(uri);
+                final String[] split = docId.split(":");
+                final String type = split[0];
+
+                Uri contentUri = null;
+                if ("image".equals(type)) {
+                    contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
+                } else if ("video".equals(type)) {
+                    contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
+                } else if ("audio".equals(type)) {
+                    contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
+                }
+
+                final String selection = "_id=?";
+                final String[] selectionArgs = new String[] { split[1] };
+
+                return getDataColumn(getApplicationContext(), contentUri, selection, selectionArgs);
+            } 
+        }
+        // MediaStore (and general)
+        else if ("content".equalsIgnoreCase(uri.getScheme())) {
+
+            // Return the remote address
+            if (isGooglePhotosUri(uri))
+                return uri.getLastPathSegment();
+
+            return getDataColumn(getApplicationContext(), uri, null, null);
+        }
+        // File
+        else if ("file".equalsIgnoreCase(uri.getScheme())) {
+            return uri.getPath();
         }
         return null;
     }
 
+    /**
+     * Get the value of the data column for this Uri. This is useful for
+     * MediaStore Uris, and other file-based ContentProviders.
+     * 
+     * @param context The context.
+     * @param uri The Uri to query.
+     * @param selection (Optional) Filter used in the query.
+     * @param selectionArgs (Optional) Selection arguments used in the query.
+     * @return The value of the _data column, which is typically a file path.
+     */
+    public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
+
+        Cursor cursor = null;
+        final String column = "_data";
+        final String[] projection = { column };
+
+        try {
+            cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
+            if (cursor != null && cursor.moveToFirst()) {
+
+                final int column_index = cursor.getColumnIndexOrThrow(column);
+                return cursor.getString(column_index);
+            }
+        } finally {
+            if (cursor != null)
+                cursor.close();
+        }
+        return null;
+    }
+
+    /**
+     * @param uri The Uri to check.
+     * @return Whether the Uri authority is ExternalStorageProvider.
+     */
+    public static boolean isExternalStorageDocument(Uri uri) {
+        return "com.android.externalstorage.documents".equals(uri.getAuthority());
+    }
+
+    /**
+     * @param uri The Uri to check.
+     * @return Whether the Uri authority is DownloadsProvider.
+     */
+    public static boolean isDownloadsDocument(Uri uri) {
+        return "com.android.providers.downloads.documents".equals(uri.getAuthority());
+    }
+
+    /**
+     * @param uri The Uri to check.
+     * @return Whether the Uri authority is MediaProvider.
+     */
+    public static boolean isMediaDocument(Uri uri) {
+        return "com.android.providers.media.documents".equals(uri.getAuthority());
+    }
+
+    /**
+     * @param uri The Uri to check.
+     * @return Whether the Uri authority is Google Photos.
+     */
+    public static boolean isGooglePhotosUri(Uri uri) {
+        return "com.google.android.apps.photos.content".equals(uri.getAuthority());
+    }
+    
+    /**
+     * 
+     * @param uri The Uri to check.
+     * @return Whether the Uri authority is Google Drive.
+     */
+    public static boolean isGoogleDriveDocument(Uri uri) {
+        return "com.google.android.apps.docs.storage".equals(uri.getAuthority());
+    }
+
     /**
      * Pushes a directory to the drop down list
      * @param directory to push