获取文件Uri对应的真实路径

String[] projection = { MediaStore.Images.Media.DATA };CursorLoader loader = new CursorLoader(this,uri, projection, null, null, null);Cursor cursor = loader.loadInBackground();int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);cursor.moveToFirst();return cursor.getString(column_index);