切换片段时销毁/停止MediaPlayer

Question

我有一个带有侧面板的平板电脑视图和右侧的主要片段。问题是我有一个MediaPlayer即使有人切换到另一个片段也继续播放，这意味着当用户返回片段时，它会导致暂停按钮崩溃。一旦用户按下另一个片段，它将如何制作它，它会停止/销毁MediaPlayer？

public class Fragment_7 extends Fragment {

private MediaPlayer mp;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)

{

    return inflater.inflate(R.layout.fragment_7, null);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);





    GridView gridView = (GridView)getView().findViewById(R.id.gridview);
    gridView.setAdapter(new MyAdapter(getActivity()));

    gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                                int position, long id) {

            switch (position) {
                case 0:
                    stopPlaying();
                    mp = MediaPlayer.create(getActivity(), R.raw.sound01);
                    mp.start();

                    // This will make  sound
                    break;
                case 1:
                    stopPlaying();
                    mp = MediaPlayer.create(getActivity(), R.raw.sound02);
                    mp.start();
                    break;
                case 2:

                        stopPlaying();
                        mp = MediaPlayer.create(getActivity(), R.raw.sound03);
                        mp.start();
                    break;
                case 3:
                    stopPlaying();
                    mp = MediaPlayer.create(getActivity(), R.raw.sound04);
                    mp.start();
                    break;
                case 4:
                    stopPlaying();
                    mp = MediaPlayer.create(getActivity(), R.raw.sound05);
                    mp.start();
                    break;
                case 5:
                    Intent i = new Intent(Intent.ACTION_VIEW,
                            Uri.parse("https://play.google.com/store"));
                    startActivity(i);

                    break;
            }
        }
    });
            FloatingActionButton fab = (FloatingActionButton) getView().findViewById(R.id.fab);

            fab.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (mp.isPlaying()) {
                        mp.pause();
                        mp.seekTo(0);
                    }
                }
            });
        }


    private void stopPlaying() {
    if (mp != null) {
        mp.stop();
        mp.release();
        mp = null;
    }}}