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I have an activity that runs asynctasks among other things, I don't want everything to be reset when the layout changes.

I put this in the activity's manifest element android:configChanges="orientation" but unfortunately the activity doesn't even switch from the landscape to portrait layout anymore when that is there!

I only halfway understand saveInstanceStates and passing Bundles around, and I'm definitely not sure how to use that with complex data objects, insight appreciated there

What I would like to do is make sure that the asynctasks don't run again, (I could save variables to disk, and do a conditional check for them before running the asynctask) if there is some android way to really watch out for this that would be great!

thanks

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3 回答 3

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我相信这个图书馆一定会达到你的目的

http://brainflush.wordpress.com/2009/11/16/introducing-droid-fu-for-android-betteractivity-betterservice-and-betterasynctask/

于 2011-09-22T01:06:11.440 回答
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当您放入android:configChanges="orientation"清单时，您声明 android 不需要处理方向更改。因此，定向永远不会发生。

您可以在此线程中查看如何保存值以捆绑 onConfigurationChange（在您的情况下为方向）。如何保存 Android 应用程序的状态？

简而言之，您可以通过覆盖onSaveInstanceState(Bundle savedInstanceState). 通过覆盖onRestoreInstanceState(Bundle savedInstanceState)或检查 bundle 参数来检索您保存到 bundle 的值onCreate。

于 2011-09-22T00:45:35.890 回答
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我决定发布对我有用的东西，这是你的样子吗？这是来自我的清单：

<activity android:name=".MediaSelectActivity" 
android:configChanges="orientation|keyboardHidden" 
android:label="Select Media Item for Vision"
 ></activity>
于 2011-09-22T01:07:36.230 回答