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;