如何通過在Android中擴展View來拖動多個圖像？

Question

我正在對圖像進行拖放操作。我通過擴展View開發了MyView類，我重寫了onDraw方法，現在我可以拖動單個圖像。

但是，當涉及到多個圖像我無法拖動所需的圖像。當我嘗試這樣做時，每個圖像都被拖拽。

這裏是我的代碼：

公共類家庭延伸活動{

public void onCreate(Bundle savedInstanceState) { 

    super.onCreate(savedInstanceState); 

    setContentView(new MyView(getApplicationContext())); 

} 
public static class MyView extends View{ 
    private Drawable mIcon,mIcon1; 
    private TextView tv; 
    private float mLastTouchX; 
    private float mLastTouchY; 
    private float mPosX; 
    private float mPosY; 
    public MyView(Context context) { 
     super(context); 
     // TODO Auto-generated constructor stub 
    mIcon=getResources().getDrawable(R.drawable.icon); 
    mIcon.setBounds(0,0,mIcon.getIntrinsicWidth(),mIcon.getIntrinsicHeight()); 

    mIcon1=getResources().getDrawable(R.drawable.icon); 

    mIcon1.setBounds(40,40,150,100); 
    } 

    @Override 
    protected void onDraw(Canvas canvas) { 
     super.onDraw(canvas); 
     canvas.save(); 
     canvas.translate(mPosX,mPosY); 
     tv.draw(canvas); 
     mIcon.draw(canvas); 
     mIcon1.draw(canvas); 
     canvas.restore(); 
    } 

    @Override 
    public boolean onTouchEvent(MotionEvent event) { 
    switch(event.getAction()) 
    { 
    case MotionEvent.ACTION_DOWN: { 
      final float x = event.getX(); 
      final float y = event.getY(); 
      mLastTouchX = x; 
      mLastTouchY = y; 
      break; 
     }  
     case MotionEvent.ACTION_MOVE: { 
      final float x = event.getX(); 
      final float y = event.getY(); 
      final float dx = x - mLastTouchX; 
      final float dy = y - mLastTouchY; 
      mPosX += dx; 
      mPosY += dy; 
      mLastTouchX = x; 
      mLastTouchY = y; 
      invalidate(); 
      break; 
     } 
    } 
     return true; 
    } 
} 

}

感謝

Answer 1

請添加一些代碼,,但是當你這樣做,,您是否將所有圖像添加到同一個視圖中，您必須創建不同的MyView實例，每個實例都有一個圖像以分離拖動操作。