有关在Android Canvas上绘制数万个像素的建议

Question

我有一个在后台线程上绘制的自定义视图，与定义为here的BallThread相似。

在我的特定应用程序中，我绘制了一行像素，每个像素都有一个独特的颜色。当下一组数据进入时，当前绘制的像素向上移动，添加一个新行，并重新绘制所有内容。该面板还支持平移和缩放。

我的问题是，随着时间的推移，我有更多像素要跟踪并重新绘制，平移和缩放的动画会变得更加困难。我觉得我需要绘制的东西似乎超出了Canvas能够及时支持的限制。

class DrawingThread extends Thread {
    private SurfaceHolder _surfaceHolder;
    private DrawingView _panel;
    private boolean _run = false;

    public DrawingThread(SurfaceHolder surfaceHolder, DrawingView panel) {
        _surfaceHolder = surfaceHolder;
        _panel = panel;
    }

    public void setRunning(boolean run) {
        _run = run;
    }

    public SurfaceHolder getSurfaceHolder() {
        return _surfaceHolder;
    }

    @Override
    public void run() {
        Canvas canvas;
        while (_run) {
            canvas = null;
            try {
                canvas = _surfaceHolder.lockCanvas(null);
                synchronized (_surfaceHolder) {
                    _panel.doDraw(canvas);
                }

                Thread.sleep(20);
            } catch (InterruptedException e) {
                e.printStackTrace();
            } finally {
                // do this in a finally so that if an exception is thrown
                // during the above, we don't leave the Surface in an
                // inconsistent state
                if (canvas != null) {
                    _surfaceHolder.unlockCanvasAndPost(canvas);
                }
            }
        }
    }
}

我可以做的其他事情可以比Canvas更快地处理像素绘制（例如canvas.drawPixel（））吗？