Android游戏编程之从零开始、p173

Android游戏编程之从零开始、p173
自定义动画
动态位图

private void T1set() {
    btax = bitmapB.getWidth() - this.getWidth();
    btay = -bitmapB.getHeight() + this.getHeight();
}

private void T1(Canvas canvas) {
    btax -= 10;
    canvas.drawColor(Color.RED);
    canvas.drawBitmap(bitmapB, -btax, btay, paint);
}

private void mDraw() {
    try {
        canvas = surfaceHolder.lockCanvas();
        if (canvas != null) {
            T1(canvas);
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (canvas != null) {
            surfaceHolder.unlockCanvasAndPost(canvas);
        }
    }
}

@Override
public void run() {
    while (thflag) {
        long s = System.currentTimeMillis();
        mDraw();
        long e = System.currentTimeMillis();
        if (e - s < 50) {
            try {
                Thread.sleep(50 - (e - s));
            } catch (InterruptedException e1) {
                e1.printStackTrace();
            }
        }
    }
}