popBackStack（）saveInstanceState后（） [英] popBackStack() after saveInstanceState()

问题描述

我遇到了一个问题，我有多个片段的活动。对于任何个别片段，您可以执行搜索操作，其工作就好了... ...如果你从任何一个片段进行搜索，它会显示一个新的活动来处理搜索，然后将结果返回给活动处理显示新片段。问题是，搜索操作后，我希望能够以清除（几乎）所有的碎片远用 popBackStackImmediate（...），自 saveInstanceState（...）叫，我得到一个说异常：

I'm running into an issue where I have an Activity with multiple fragments. For any individual fragment, you can perform a search operation, which works just fine...if you search from any of the fragments, it will display a new Activity to handle the searching, then return the result to the Activity to handle displaying a new fragment. The problem is, after a search operation, I want to be able to clear (almost) all the fragments away using popBackStackImmediate(...) and since saveInstanceState(...) was called, I get an exception that says:

"java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState"

不知道如何从后面栈中弹出后的onSaveInstanceState 被称为？

推荐答案

显然，我的问题从的onActivityResult（...）

Apparently my issue spawned from the call being made in onActivityResult(...)

我能够通过把里面一个Runnable的UI修改code，然后发布了Runnable主线程来解决这个问题：

I was able to fix the issue by putting the UI modification code inside a Runnable, then posting the Runnable to the main thread:

Runnable r = new Runnable() {
    @Override
    public void run() {
        // UI code here
    }
};
Handler h = new Handler();
h.post(r);

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