快速查询图片

Cursor c = getContentResolver().query( Images.Media.EXTERNAL_CONTENT_URI, null, null, null, null );if ( c != null ) {    if (c.moveToFirst()) {                       do {         long id = c.getLong( c.getColumnIndex( Images.Media._ID ) );Uri imageUri = Uri.parse( Images.Media.EXTERNAL_CONTENT_URI + "/" + id );   arrayList.add(imageUri);//imageUrls.add(getRealFilePath(MainActivity.this, imageUri));          } while (c.moveToNext());                }}c.close();c = null;