我刚刚发现了一些东西，我想知道如何和为什么。 我正在开发一个小的街机游戏为Android。我决定忽略OpenGL和使用标准SurfaceView和可绘做到这一点，因为它的假设是轻（10精灵左右）。 我有我加载可绘，而我使用的方法绘制，并通过他们我的画布。这每一个精灵如何绘制到屏幕上。 那么事实证明，绘制4-5大精灵（200X400左右）需要很长的时间低于全新的手机型号。足够长的时间让我的游戏无法播放。我们谈论的是50-60毫秒绘制使用这种方法的一个帧。我真的不从图纸做任何事情有分开，我无处可降低成本。所以我决定尝试使用位图来代替。然而，这里，我需要$ P $对设定的尺寸，因为有在一个位图没有的setBounds'方法。没有概率，我调整它们的大小以适合我的负载电流屏幕上，问题就解决了​​。

I just found out something and I was wondering about how and why. I'm developing a small arcade game for Android. I decided to ignore OpenGL and use the standard SurfaceView and Drawables to do it, since it's suppose to be light (10 sprites or so). I have drawables that I load, and I use the method Draw and passing them my canvas. This how every sprite is drawn to the screen. Well it turns out that drawing 4-5 big sprites (200X400 or so) takes a long time on less-than-brand-new phone models. Long enough to make my game unplayable. We're talking about 50-60 milliseconds to draw a single frame using this method. And I really don't do anything there apart from drawing, nowhere I can cut costs. So I decided to try and use Bitmaps instead. Here, however, I need to pre-set the size, since there's no 'setBounds' method in a bitmap. No prob, I resize them to fit my current screen on load, problem solved.

确定。所以，我得到了位图。我用Canvas.DrawBitmap现在画画。我长椅新的绘制方法..和我收到了百日咳 400％的性能提升！而是50-60ms的，整个抽签循环现在需要8-12ms。 什么是地狱？ 为了排除这种可能，我计时了的setBounds也一样，它需要与LT; 1毫秒，所以它不是太不争气。这是该会减慢速度实际Drawable.Draw。

OK. So I got bitmaps. I use Canvas.DrawBitmap now to draw. I bench the new draw method.. and I get a whooping 400% performance boost! Instead of 50-60ms, the entire draw loop now takes 8-12ms. What the hell?? To rule it out, I timed the setBounds too, it takes <1ms so it's not too blame. It's the actual Drawable.Draw that slows things down.

对于我来说，这是个好消息，因为我真的不想学的OpenGL，使我的游戏可玩的，但我不能停止想知道它 - 它是罚款？是否有问题，我的方法是什么？为什么不提及任何地方？

For me this is great news, since I really didn't want to learn OpenGL to make my game playable, but I can't stop wondering about it - Is it fine? are there problems with my method? Why isn't it mentioned anywhere?

推荐答案

在 SurfaceView 你的画布的意思使用时，你应该不断地迭代和绘制对象不是用于这一目的。

The SurfaceView of your Canvas is meant to be used when you should iterate constantly and Drawable is not for that purpose.