soundpool中的多點觸摸

Question

如何在soundpool中進行多點觸摸？我有3個按鈕。當手指滑動觸摸按鈕時，就像鋼琴中的聲音一樣？這是我的代碼：

sp = new SoundPool (5, AudioManager.STREAM_MUSIC, 0); 
player1 = sp.load(this, R.raw.ndang, 1); 
player2 = sp.load(this, R.raw.nding, 1); 
player3 = sp.load(this, R.raw.ndung, 1); 

ndang = (ImageButton) this.findViewById(R.id.ndang); 
ndang.setOnClickListener(new OnClickListener() { 
    public void onClick(View arg0) { 
     // TODO Auto-generated method stub 
     sp.play(player1, 1, 1, 0, 0, 1); 
    } 
}); 

ndang = (ImageButton) this.findViewById(R.id.ndang2); 
ndang.setOnClickListener(new OnClickListener() { 
    public void onClick(View arg0) { 
     // TODO Auto-generated method stub 
     sp.play(player1, 1, 1, 0, 0, 1); 
    } 
}); 

nding = (ImageButton) this.findViewById(R.id.nding); 
nding.setOnClickListener(new OnClickListener() { 
    public void onClick(View arg0) { 
     // TODO Auto-generated method stub 
     sp.play(player2, 1, 1, 0, 0, 1); 
    } 
}); 

Answer 1

您需要實現一個鋼琴View.OnTouchListener或者更好的是創建一個包含全鍵盤自定義視圖，並覆蓋onTouchEvent。這將使您能夠檢測多個鋼琴鍵和按鍵幻燈片，同時最小化代碼。

編輯：

public class PianoView extends View { 
    @Override 
    onTouchEvent(MotionEvent event) { 
     //your code to find which key was pressed based on x,y touch 
    } 
} 

或

public class PianoActivity extends Activity { 
    @Override 
    dispatchTouchEvent(MotionEvent event) { 
     //your code to find which key was pressed based on x,y touch 
    } 
} 

Answer 2

願這可以幫助您：http://www.martinhoeller.net/2012/01/13/developing-a-musical-instrument-app-for-android/