Android多次绘制位图然后onScroll导致ANR

Question

我想多次执行

canvas.drawBitmap(...)

，但现在一旦我在我的 SurfaceView 类中使用自定义 GestureDetector 调用

onScroll(...)

，应用程序就会冻结 (ANR)。这个 SurfaceView 流程由 GameThread 控制，我在其中绘制了 3 次

canvas.drawBitmap(...)

。值得注意的是，当我从

canvas.drawBitmap(...)

注释掉第二个或第三个

drawTmxMaps(...)

时，应用程序几乎可以正确滚动 - 几乎是因为它可以工作，但滚动很慢。

那么如何解决我的问题？

这是我的代码。

Loader.java

private static Map<Integer, Bitmap[]> differentFramesMap = new HashMap<>();
private static Map<Integer, Canvas[]> differentCanvasesMap = new HashMap<>();

(...)

public static void drawTmxMaps(Canvas canvas, Context context) {
    canvas.drawBitmap(differentFramesMap.get(0)[framesFirstAnimIter], 0, 0, PaintTemplates.getInstance(context).pMap);
    canvas.drawBitmap(differentFramesMap.get(1)[framesSecondAnimIter], 0, 0, PaintTemplates.getInstance(context).pMap);
    canvas.drawBitmap(differentFramesMap.get(2)[framesThirdAnimIter], 0, 0, PaintTemplates.getInstance(context).pMap);

    if (!isIterStarted) {
        iterTmxFrames();
        isIterStarted = true;
    }
}

private static void iterTmxFrames() {
    runnable = () -> {
        framesFirstAnimIter++;
        framesSecondAnimIter++;
        framesThirdAnimIter++;
        if (framesFirstAnimIter == 3)
            framesFirstAnimIter = 0;
        if (framesSecondAnimIter == 2)
            framesSecondAnimIter = 0;
        if (framesThirdAnimIter == 2)
            framesThirdAnimIter = 0;
        handler.postDelayed(runnable, 1000);
    };
    handler.postDelayed(runnable, 1000);
}

MyThread.java

    @Override
public void run() {
    while (isRunning) {
        startTime = SystemClock.uptimeMillis();
        Canvas canvas = surfaceHolder.lockCanvas(null);
        if (canvas != null) {
            synchronized (surfaceHolder) {

                TmxLoader.drawTmxMaps(canvas, gameSurface.getContext());

                surfaceHolder.unlockCanvasAndPost(canvas);
            }
        }

        loopTime = SystemClock.uptimeMillis() - startTime;

        if (loopTime < delay) {
            try {
                Thread.sleep(delay - loopTime);
            } catch (InterruptedException e) {
                Log.e("Interupted ex", e.getMessage());
            }
        }
    }
}