如何改善ViewFlipper / ViewAnimator的性能 [英] How to improve the performance of ViewFlipper/ViewAnimator

问题描述

我使用的 ViewAnimator （父类中的 ViewFlipper ）做出某种互动的书。 层次结构大致是这样的：

I'm using a ViewAnimator (parent class of ViewFlipper) to make some kind of interactive book. The hierarchy is roughly like this:

<ViewAnimator>
  <include layout="@layout/p0" />
  <include layout="@layout/p1" />
  <include layout="@layout/p2" />
  ...
</ViewAnimator>

所以书的页是ViewAnimator内部。每一页都有与动画ImageViews，TextViews，按钮...多层的这竟然是太多的FrameLayout。显示这本书通过viewAnimator.showNext一个新的页面（）可以采取秒。所有的时间都用在ImageView.onDraw（）-Traceview。

So the pages of the book are inside the ViewAnimator. Each page has a FrameLayout with multiple layers of animated ImageViews, TextViews, Buttons... which turned out to be too much. Displaying a new page of the book via viewAnimator.showNext() can take seconds. All that time is spent in ImageView.onDraw() -Traceview.

- 将会任何布局的替代ViewAnimator （ViewPager，ViewGroup中的其它实现......）改善什么？

-Will any layout alternative to ViewAnimator (ViewPager, other implementations of ViewGroup...) improve anything?

-Is有没有办法为 preLOAD的意见 ViewFlipper / ViewAnimator /等将展示下？ （因此，这本书的下一个页面随时准备和乐意在内存中）

-Is there any way to preload the views a ViewFlipper/ViewAnimator/other will show next? (so that the next page of the book is always ready and happy in memory)

-Should我用帆布或GLSurfaceView？ （不能使用动画框架）

-Should I use Canvas or GLSurfaceView? (cannot use the animation framework)

我卡住了...你能帮忙吗？

I'm stuck... can you help?

推荐答案

我不能回答你所有的问题，但我会给你我所知道的，因为它比缺乏其他的答案更好。 ：P

I can't answer all your questions, but I'll give you what I know since it is better than the lack of other answers. :P

ViewPagers默认加载任何一方的意见。这加快了开关，但可能会降低当前打开的视图。对一个viewpager preloaded视图的数目可使用它的方法来设置。

ViewPagers load the views on either side by default. This speeds the switch, but might slow the view that is currently open. The number of preloaded views on a viewpager can be set using one of its methods.

如果你不想ViewPager，你可以尝试真正实例​​你想preloaded自己的看法，并简单地将它们设置为不可见。

If you don't want a ViewPager, you might try actually instantiating the views you want preloaded yourself, and simply setting them to invisible.

我没有经历过的帆布或GL除了地图叠加，但我希望他们可以更快/响应/有效的，如果实施得当，因为你不会有任何不必要的功能。也许是凌乱的，虽然，这取决于你的内容的来源。

I am not experienced with the canvas or GL besides map overlays, but I expect that they COULD be much quicker/responsive/efficient if properly implemented since you wouldn't have any unneeded functionality. Might be messy though, depending on the source of your content.

建议： 尝试ViewPager，它是由像您实现。如果你不满意它，卷起你的袖子，检查到画布上的东西。

RECOMMENDATION: Try the ViewPager, it is made for implementations like yours. If you are unsatisfied with it, roll up your sleeves and check into canvas stuff.

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