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我使用此代码（我在 stackoverflow 上找到）实现了一个简单的 MediaController。我的第一个问题是我希望MediaController始终可见。我可以覆盖该hide()方法，但此时我无法使用 BACK 按钮退出我的应用程序。我读到覆盖dispatchKeyEvent()可能会解决问题，但它对我没有影响。

实际上我的第二个问题是使用它时如何制作活动按钮？媒体播放器中没有新按钮，但我希​​望它们采用另一种布局（我将有大约 15 个不同的按钮）。如果我LinearLayout在我的 xml 中创建一个新的，那么在媒体控制器出现在屏幕上之前，带有按钮的布局是不活动的。touchEvent 使MediaController消失，然后我可以按下按钮。MedaiController是否可以同时在屏幕上拥有活动按钮和永不消失的按钮？

public class PlayAudioActivity extends Activity implements MediaPlayerControl {
    private static final String PLAY_AUDIO = "PLAY_AUDIO";
    private MediaController mMediaController;
    private MediaPlayer mMediaPlayer;
    private Handler mHandler = new Handler();

    static Context context;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        context=this;

        mMediaPlayer = new MediaPlayer();
        mMediaController = new MediaController(this)
          /* {
                  @Override
                public void hide()
                {
                  mMediaController.show(0);
                }
            }*/; 

        mMediaController.setMediaPlayer(PlayAudioActivity.this);
        mMediaController.setAnchorView(findViewById(R.id.audioView));



       // String audioFile = "" ; 
        try {
            mMediaPlayer.setDataSource(this,Uri.parse("android.resource://com.example.audioplayer/raw/song"));
            mMediaPlayer.prepare();
        } catch (IOException e) {
            Log.e(PLAY_AUDIO, "Could not open file " + "  " + " for playback.", e);
        }

        mMediaPlayer.setOnPreparedListener(new OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mHandler.post(new Runnable() {
                    public void run() {
                        mMediaController.show(0);
                        mMediaPlayer.start();
                    }
                });
            }
        });



    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mMediaPlayer.stop();
        mMediaPlayer.release();
    }

    @Override
    public boolean canPause() {
        return true;
    }

    @Override
    public boolean canSeekBackward() {
        return false;
    }

    @Override
    public boolean canSeekForward() {
        return false;
    }

    @Override
    public int getBufferPercentage() {
        int percentage = (mMediaPlayer.getCurrentPosition() * 100) / mMediaPlayer.getDuration();

        return percentage;
    }

    @Override
    public int getCurrentPosition() {
        return mMediaPlayer.getCurrentPosition();
    }

    @Override
    public int getDuration() {
        return mMediaPlayer.getDuration();
    }

    @Override
    public boolean isPlaying() {
        return mMediaPlayer.isPlaying();
    }

    @Override
    public void pause() {
        if(mMediaPlayer.isPlaying())
            mMediaPlayer.pause();
    }


    @Override
    public void seekTo(int pos) {
        mMediaPlayer.seekTo(pos);
    }

    @Override
    public void start() {
        mMediaPlayer.start();
    }

    /*public boolean dispatchKeyEvent(KeyEvent event)
    {
        if (event.getKeyCode() == KeyEvent.KEYCODE_BACK)

        finish();
        return super.dispatchKeyEvent(event);
    }*/

    @Override
    public boolean onTouchEvent(MotionEvent event) {
    mMediaController.show(0);

        return false;
    }
}

我的xml布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/audioView"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >

     <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button" />

    </LinearLayout>
    <LinearLayout
        android:id="@+id/audioView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >
    </LinearLayout>

</LinearLayout>
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