尝试清除Android SurfaceView / Canvas后闪烁

因此,我尝试使用canvas.drawColor(Color.BLACK)清除Canvas,但如果仅调用一次,则显示闪烁并显示应该由drawColor覆盖的旧图形。

这是我代码的重要部分-

// This method is called by a Thread                

public void update() {

Canvas canvas = holder.lockCanvas(null);

if (canvas != null) {

onDraw(canvas);

}

holder.unlockCanvasAndPost(canvas);

}

@Override

protected void onDraw(Canvas canvas) {

if (toClear) {

canvas.drawColor(Color.BLACK);

//if this is not set to change back to false, it does not flicker

toClear = false;

}

//Draw some objects that are moving around

}

public void clearScreen() {

// This method is called when the user pressed a button

toClear = true;

}

在Google搜索一个小贴士之后,我听说了双重缓冲,但是我了解到lockCanvas()和unlockCanvasAndPost()应该为我处理这个问题。这是怎么了?

回答:

我想知道这是否与SurfaceView双缓冲有关,并且它们交替每帧。因此,您必须至少清除屏幕两帧。

更改toClear = truetoClear = 2与集

if(toClear > 0) { 

'drawColor'

toClear--;

}

以上是 尝试清除Android SurfaceView / Canvas后闪烁 的全部内容, 来源链接: utcz.com/qa/421606.html

回到顶部