android-SurfaceView：＆＃34;对象正在消失＆＃34;

Question

欧尔。我正面临着androird surfaceView的问题。我试图通过改变它的x，y坐标来设置球的动画。但球正在消失......请查看代码并确定问题， regards.`

protected void onDraw（Canvas canvas）{

super.onDraw(canvas);
    canvas.drawBitmap(tile1, axisX, axisY,null);        //LINE ONE objects
    canvas.drawBitmap(tile2, axisX+78, axisY,null);
    canvas.drawBitmap(tile3, axisX+156, axisY,null);
    canvas.drawBitmap(tile4, axisX+234, axisY,null);


    canvas.drawBitmap(movingStick, (mWidth-movingStick.getWidth())/2, mHeight-200,null);
    canvas.drawBitmap(mBall, balCurrPosX,balCurrPosY  ,null);

}

//线程代码

Thread t=new Thread(new Runnable() {

    private boolean moveUp = true;


    @Override
    public void run() {
        // TODO Auto-generated method stub
        try{

            while (true) {
            if (balCurrPosY >= mHeight){
                moveUp= false;
            }else if(balCurrPosX<=0){
                moveUp = true;
            }
            if(moveUp)
                balCurrPosY--;
            else
                balCurrPosY++;
            Thread.sleep(2000);
            postInvalidate();
            }


        } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        }
    }
});`

Answer 1

您忘记在代码末尾开始新的主题：

     } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        }
    }
}).start();