在选项卡式活动中打开新片段时播放声音

Question

我想在选项卡式活动中播放声音。每当滑动屏幕/片段并打开新的屏幕/片段时，都应该播放声音。但这没有发生。

public static class PlaceholderFragment extends Fragment {
/**
 * The fragment argument representing the section number for this
 * fragment.
 */
private static final String ARG_SECTION_NUMBER = "section_number";

public PlaceholderFragment() {
}

/**
 * Returns a new instance of this fragment for the given section
 * number.
 */
public static PlaceholderFragment newInstance(int sectionNumber) {
    PlaceholderFragment fragment = new PlaceholderFragment();
    Bundle args = new Bundle();
    args.putInt(ARG_SECTION_NUMBER, sectionNumber);
    fragment.setArguments(args);
    return fragment;
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_main, container, false);
   /* TextView textView = (TextView) rootView.findViewById(R.id.section_label);
    textView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));*/
    final MediaPlayer playmysnake=MediaPlayer.create(getActivity(),R.raw.rattlesnakerattle);
    playmysnake.start();

    return rootView;
}

}