Question

我正在制作一个钢琴应用程序，其中有九个按钮，当我们触摸按钮时，每个按钮播放不同的声音。但现在问题是 -

1）当我们触摸按钮时，它只播放该按钮的声音，并且在移动手指时没有播放下一个按钮的声音。

2）如果我使用ACTION_UP来停止声音，那么当我们从按钮上抬起手指时，它会停止声音，而不会完成该按钮的完整声音。

   public class Piano_view extends Activity implements View.OnTouchListener {

    Button sound1, sound2, sound3, sound4, sound5, sound6, sound7, sound8,
            sound9;

    MediaPlayer mp1, mp2, mp3, mp4, mp5, mp6, mp7, mp8, mp9;



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.piano_view);
        initMpFiles();
        setVolumeControlStream(AudioManager.STREAM_MUSIC);





        sound1 = (Button) findViewById(R.id.one);
        sound2 = (Button) findViewById(R.id.second);
        sound3 = (Button) findViewById(R.id.three);
        sound4 = (Button) findViewById(R.id.four);
        sound5 = (Button) findViewById(R.id.five);
        sound6 = (Button) findViewById(R.id.six);
        sound7 = (Button) findViewById(R.id.seven);
        sound8 = (Button) findViewById(R.id.eight);
        sound9 = (Button) findViewById(R.id.nine);

        sound1.setOnTouchListener(this);
        sound2.setOnTouchListener(this);
        sound3.setOnTouchListener(this);
        sound4.setOnTouchListener(this);
        sound5.setOnTouchListener(this);
        sound6.setOnTouchListener(this);
        sound7.setOnTouchListener(this);
        sound8.setOnTouchListener(this);
        sound9.setOnTouchListener(this);
    }

    private void initMpFiles() {
        mp1 = MediaPlayer.create(Piano_view.this, R.raw.a4);
        mp2 = MediaPlayer.create(Piano_view.this, R.raw.b4);
        mp3 = MediaPlayer.create(Piano_view.this, R.raw.c4);
        mp4 = MediaPlayer.create(Piano_view.this, R.raw.c5);
        mp5 = MediaPlayer.create(Piano_view.this, R.raw.e4);
        mp6 = MediaPlayer.create(Piano_view.this, R.raw.b4);
        mp7 = MediaPlayer.create(Piano_view.this, R.raw.f4);
        mp8 = MediaPlayer.create(Piano_view.this, R.raw.d4);
        mp9 = MediaPlayer.create(Piano_view.this, R.raw.g4);
    }





    @Override
    public boolean onTouch(View v, MotionEvent event) {
        int id = v.getId();
        switch (id) {
            case R.id.one:

                float x = event.getX();
                float y = event.getY();
                if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
                    mp1.start();
                    mp1.seekTo(0);
                    v.setPressed(true);
                    return true;
                }

                break;
            case R.id.second:
                if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
                    mp2.start();
                    mp2.seekTo(0);
                    v.setPressed(true);
                    return true;
                }
                break;
            case R.id.three:
                if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
                    mp3.start();
                    mp3.seekTo(0);
                    v.setPressed(true);
                    return true;
                }
                break;
            case R.id.four:
                if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
                    mp4.start();
                    mp4.seekTo(0);
                    v.setPressed(true);
                    return true;
                }
                break;



            case R.id.five:
                if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
                    mp5.start();
                    mp5.seekTo(0);

                    v.setPressed(true);
                    return true;
                }
                break;
            case R.id.six:
                if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
                    mp6.start();
                  mp6.seekTo(0);
                    v.setPressed(true);
                    return true;
                }
                break;
            case R.id.seven:
                if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
                    mp7.start();
                   mp7.seekTo(0);
                    v.setPressed(true);
                    return true;
                }
                break;
            case R.id.eight:
                if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {

                 mp8.start();
                    mp8.seekTo(0);
                    v.setPressed(true);
                    return true;
                }
                break;
            case R.id.nine:
                if (event.getAction() == android.view.MotionEvent.ACTION_DOWN) {
                    mp9.start();
                    mp9.seekTo(0);
                    v.setPressed(true);
                    return true;
                }


                    break;








        }
        return true;
    }


}

Answer 1

在这种情况下，你不应该使用Button.Draw包含＆＃34; 9按钮＆＃34; 的视图，并由你自己处理触摸事件。

Answer 2

您可以使用onTouch并在新主题中启动音乐。如果你正在移动线程继续运行。您可以使用处理程序。

Handler handler = new Handler();

在你的onTouch监听器中。如果它与ACTION_DOWN一起使用，我不会感到害羞。您还可以添加ACTION_MOVE以检测移动。

                    int x = (int) motionEvent.getRawX() - coords[0];
                    int y = (int) motionEvent.getRawY() - coords[1];
                if (event.getAction() == android.view.MotionEvent.ACTION_DOWN || event.getAction() == android.view.MotionEvent.ACTION_MOVE) {
                    if(put your test with the coodinates here){
                        handler.post(runMp1);
                        return true;
                    }
                }

            break;

现在你需要检查触摸走廊是否在按钮中。一个例子可能是

 int M1right = (int) button.getRight();
 int M1top = (int) button.getTop();
 int M1left = (int) button.getLeft();
 int M1bottom = (int) button.getBottom();

 if(x < M1right && x > M1left && y < M1bottom && y > M1top)

然后你需要一个线程

private Runnable runMp1 = new Runnable() {
    @Override
    public void run() {
        mp1.start();
        mp1.seekTo(0);
        v.setPressed(true);
    }
};

另外你可以添加一个bool var，它被设置为fase直到声音结束。只有当此var为true时，处理程序才会启动。

希望能解决您的问题。祝你有愉快的一天！

Android按钮问题

2 个答案: