使用支持库时LoaderManager上的Loader <cursor>错误

Question

为什么我会收到此错误？

  

（错误：（42,107）错误：不是   抽象并且不会覆盖抽象方法   LoaderCallbacks中的onCreateLoader（int，Bundle）

创建音乐播放器应用时

错误继续出现在Loader中。

private void getAudioListFromMediaDatabase() {
    getSupportLoaderManager().initLoader(LOADER_ID, null, new LoaderManager.LoaderCallbacks<Cursor>() {
        @Override
        public Loader<Cursor> onCreateLoader(int id, Bundle args) {
            Uri uri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
            String[] projection = new String[]{
                    MediaStore.Audio.Media._ID,
                    MediaStore.Audio.Media.TITLE,
                    MediaStore.Audio.Media.ARTIST,
                    MediaStore.Audio.Media.ALBUM,
                    MediaStore.Audio.Media.ALBUM_ID,
                    MediaStore.Audio.Media.DURATION,
                    MediaStore.Audio.Media.DATA
            };
            String selection = MediaStore.Audio.Media.IS_MUSIC + " = 1";
            String sortOrder = MediaStore.Audio.Media.TITLE + " COLLATE LOCALIZED ASC";
            return new CursorLoader(getApplicationContext(), uri, projection, selection, null, sortOrder);
        }

        @Override
        public void onLoadFinished(android.support.v4.content.Loader<Cursor> loader, Cursor data) {

        }

        @Override
        public void onLoaderReset(android.support.v4.content.Loader<Cursor> loader) {

        }


        @Override
        public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
            mAdapter.swapCursor(data);
        }


        @Override
        public void onLoaderReset(Loader<Cursor> loader) {
            mAdapter.swapCursor(null);
        }
    });
}