安卓：2D。 OpenGL 还是 android.graphics？
我正在和我的朋友一起开发我们的第一个 Android 游戏。基本思想是，游戏的每一帧整个表面都分两步重新绘制（1 个大位图）：
- 带有一些静态图像 (PNG) 的背景擦除前一帧
- 然后撒满大量粒子，从而产生以下效果肥皂泡，其中有大约 20 个位图的池，随机挑选这些位图以产生所有气泡（200 - 300 之间）都不同的错觉。每帧更新气泡位置（约 50 毫秒），产生移动气泡的效果。
数学引擎采用 C (JNI) 语言，目前所有绘图都是使用 android.graphics 包完成，与 Lunar Lander 非常相似（因为这是我使用的示例）。 它可以工作，但动画有点生涩，我可以通过手机的温度感觉到它非常繁忙。我们会从切换到 OpenGL 中受益吗？作为一个额外的问题：优化我们现在拥有的绘图机制（例如月球着陆器）的好方法是什么？
I'm working with my friend on our first Android game. Basic idea is that every frame of the game the whole surface is redrawn (1 large bitmap) in 2 steps:
- Background with some static image (PNG) wipes out previous frame
- Then it is sprinkled all over with large number of particles which produces effect of soapy bubbles where there's a pool of about 20 bitmaps which randomly gets picked to produce illusion that all bubbles (between 200 - 300) are all different. Bubbles positions updated on each frame (~50ms) producing effect of moving bubbles.
The math engine is in C (JNI) and currently all drawing is done using android.graphics package very similar (since that was the example I was using) to Lunar Lander.
It works but animation is somewhat jerky and I can feel by temperature of my phone that it is very busy. Will we benefit from switching to OpenGL? And as a bonus question: what would be a good way to optimize the drawing mechanism (Lunar Lander like) we have now?
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现在我开始使用 OpenGL ES，我还将它用于 2D 图形。这种方式是最灵活的，而且速度极快（看看 这个示例代码。它是关于 2D 渲染的，您可以从中看到 OpenGL 的强大功能。
这并不是最容易开始的事情，但是有一些很好的教程 - 例如，这个是一个非常好的。
Now I've started to work with OpenGL ES, I would also use it for 2D graphics. This way is the most flexible and it's extremely fast (look at this example code. It's about 2D rendering, and there you can see the power of OpenGL.
It's not the easiest thing to start with, but there are some good tutorials out there - for example, this is a very good one.
不要每次都重新绘制整个屏幕。这就是导致帧率低的原因。使用invalidate方法来标记每帧发生变化的区域。
Don't redraw the entire screen each time. That's what causes your low framerate. Use the invalidate method to mark the areas that have changed each frame.