绘制一个位图作为背景SurfaceView

问题描述

我目前正在绘制位图到 SurfaceView 使用 Canvas.drawBitmap（） 。这似乎真的减少我的帧率，我想知道我能做些什么来解决这个问题。我参考，我在的onDraw（）方法之外创建一个位图。我已经确定该图像是小的，不透明的，像素格式匹配...等等。当我不约10-15 FPS绘制帧率上升的形象。任何想法，以加快这？我经历了明显的滞后。

我创造一切外的位图...

 私人位图bitmapPlayer = BitmapFactory.de codeResource（getResources（），R.drawable.player）;
 

然后在我的onDraw（）方法...

  canvas.drawBitmap（bitmapPlayer，空，drawingRect，NULL）; // drawingRect是矩形画里面的位图
// ...绘图code的休息
 

解决方案

我只能假设你正在做的事情的逻辑沉重在你的绘制调用，如果你没有看到和下面的例子您code之间的任何差别

我将开始去看一看成以下，并利用你的绘图图形硬件。

希望这有助于

I am currently drawing a Bitmap to a SurfaceView using Canvas.drawBitmap(). This seems to really reduce my framerate and I was wondering what I can do to fix this. I reference a bitmap that I have created outside the onDraw() method. I have made sure that the image is small, opaque, the pixel formats match... etc. When I don't draw the image the framerate goes up by about 10-15 FPS. Any ideas to speed this up? I experience a noticeable lag.

I create the bitmap outside of everything...

private Bitmap bitmapPlayer = BitmapFactory.decodeResource(getResources(), R.drawable.player);

Then in my onDraw() method...

canvas.drawBitmap(bitmapPlayer, null, drawingRect, null); // drawingRect is the Rect to draw the Bitmap inside of
// ... Rest of drawing code

解决方案

I can only assume you are doing something logic heavy in your draw call, If you don't see any differences between your code and the following example,

http://www.droidnova.com/playing-with-graphics-in-android-part-iii,176.html

I would start to take a look into the following, and utilizing the graphics hardware for your drawing.

http://developer.android.com/resources/articles/glsurfaceview.html

Hope this helps

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