我可以在 SurfaceView 上绘制多个位图。但是我不能将其中一个分开。当我尝试滑动时，它们的行为就像一个位图。他们一起移动。当surfaceView上只有一个位图时没有问题。当有多个位图时，如何控制一个位图？
谢谢。
我的位图：
normalButton = BitmapFactory.decodeResource(getResources(), R.drawable.cyan);
normalButton=normalButton.copy(normalButton.getConfig(), true);
normalButton1=normalButton.copy(normalButton.getConfig(), true);
canvasNormalButton = new Canvas(normalButton);
pressedButton = BitmapFactory.decodeResource(getResources(), R.drawable.blue);
pressedButton=pressedButton.copy(pressedButton.getConfig(), true);
canvasPressedButton = new Canvas(pressedButton);
slideButton = BitmapFactory.decodeResource(getResources(), R.drawable.green);
slideButton=slideButton.copy(slideButton.getConfig(), true);
我的 SurfaceView 类：
class surfaceClass extends SurfaceView
{
public surfaceClass(Context context)
{
super(context);
setWillNotDraw(false);
this.setOnTouchListener(listener);
}
@Override
protected void onDraw(Canvas canvas)
{
// I add two bitmaps. But I can not slide them apartly.
canvas.drawBitmap(normalButton, newX, newY, null);
canvas.drawBitmap(normalButton, newX+40, newY, null);
}
private OnTouchListener listener = new OnTouchListener()
{
@Override
public boolean onTouch(View v, MotionEvent event)
{
switch (event.getActionMasked())
{
case MotionEvent.ACTION_MOVE:
if(buttonPressed==true)
{
canvasNormalButton.drawBitmap(slideButton, 0, 0, null);
newX=event.getX()
newY=event.getY()
invalidate();
}
break;
case MotionEvent.ACTION_UP:
buttonPressed=false;
canvasNormalButton.drawBitmap(normalButton1, 0, 0, null);
invalidate();
break;
case MotionEvent.ACTION_DOWN:
if(0<event.getX() && event.getX()<40 && event.getY()<40 && 0<event.getY())
{
buttonPressed=true;
canvasNormalButton.drawBitmap(pressedButton, 0, 0, null);
invalidate();
}
break;
}
return true;
}
};