ViewPager + SurfaceView =长延时导航时回到活动 [英] ViewPager + SurfaceView = long delay when navigating back to activity

问题描述

基本上什么标题说，

我的应用程序主要由一个 ViewPager 它采用了 FragmentStatePagerAdapter

My application consists primarily of a ViewPager which uses a FragmentStatePagerAdapter

当我添加了一系列 SurfaceViews发生问题 到FragmentStatePagerAdapter。 只是用于测试目的我没有子类SurfaceViews以任何方式。 当我浏览的，打了几页家，然后返回到活动中，整个设备冻结了两秒钟渲染才作罢。我可以在它需要为它被拉断backstack后恢复时间启动并完成（）的应用程序几次。我知道，应用程序正在运行，因为一些AsyncTasks已经由第一screendraw最后出现的时间基本完成。我知道这些AsyncTasks不会导致问题，因为我已删除他们没有影响。

The problem occurs when I add a series of SurfaceViews to the FragmentStatePagerAdapter. Just for testing purposes I did not subclass the SurfaceViews in any way. When I navigate a few pages in, hit "home," and then return to the activity, the entire device freezes for a second or two before rendering anything. I can launch and finish() the app several times in the time it takes for it to resume after being pulled off of the backstack. I know that the application is running because several AsyncTasks have nearly finished by the time the first screendraw finally occurs. I know that these AsyncTasks do not cause the problem because I have removed them to no effect.

当我改变SurfaceViews到 浏览 问题完全消失。

When I change the SurfaceViews to Views the problem vanishes entirely.

当我用我的实际SurfaceViews（这是没有商量余地的我的项目），以及会出现此问题。此问题也发生在多个设备上。

This problem occurs when I use my actual SurfaceViews (which are non-negotiable for my project) as well. This problem also occurs on multiple devices.

在这一点上，我认为故障出正视的ViewPager，但我不知道该怎么办才好，因为我需要一个界面组件。

At this point I think the fault lies squarely on the ViewPager, but I don't know what to do about it because I need that interface component.

任何帮助将是很大的AP preciated！

Any help would be greatly appreciated!

编辑：

要澄清，该SurfaceViews /浏览次数再present其添加到FragmentStatePagerAdapter片段的视图。

To clarify, the SurfaceViews/Views represent the View of the Fragment which was added to the FragmentStatePagerAdapter.

推荐答案

找到任何未来谷歌的解决方案！

Found the solution for any future googlers!

继承人如何我做到了：

在我的片段，我实例化mySurfaceView中的onCreate（）

In my fragment I instantiated mySurfaceView in onCreate()

然后我onCreateView（）

Then I attached a dummy layout (LinearLayout) to the actual view during onCreateView()

然后在onResume（）我与清除的removeAllViews虚拟布局（），然后叫addView（mySurfaceView）

Then in onResume() I cleared the dummy layout with removeAllViews() and then called addView(mySurfaceView)

这似乎让ViewPager快速建立自己的布局，然后在SurfaceView只是突然出现在之前用户实际需要看到什么！

This seems to allow the ViewPager to build its layout quickly and then the SurfaceView is just popped in before the user actually needs to see anything!

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