安卓：IllegalStateException异常 - 如果它抛出？ [英] Android: IllegalStateException - When is it thrown?
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问题描述
在我的应用程序，有时会出现以下异常被抛出：
In my application, sometimes the following exception is thrown:
07-28 14:49:25.398: ERROR/AndroidRuntime(8097):
java.lang.IllegalStateException: The content of the adapter has changed
but ListView did not receive a notification. Make sure the content of
your adapter is not modified from a background thread, but only from the
UI thread. [in ListView(2131099717, class android.widget.ListView) with
Adapter(class ch.uzh.csg.games4blue.gamebase.view.UserView$UserAdapter)]
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.ListView.layoutChildren(ListView.java:1432)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.AbsListView.onLayout(AbsListView.java:1113)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.view.View.layout(View.java:6831)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.LinearLayout.setChildFrame(LinearLayout.java:1119)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.LinearLayout.layoutVertical(LinearLayout.java:998)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.LinearLayout.onLayout(LinearLayout.java:918)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.view.View.layout(View.java:6831)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.LinearLayout.setChildFrame(LinearLayout.java:1119)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1108)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.LinearLayout.onLayout(LinearLayout.java:920)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.view.View.layout(View.java:6831)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.FrameLayout.onLayout(FrameLayout.java:333)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.view.View.layout(View.java:6831)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.LinearLayout.setChildFrame(LinearLayout.java:1119)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.LinearLayout.layoutVertical(LinearLayout.java:998)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.LinearLayout.onLayout(LinearLayout.java:918)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.view.View.layout(View.java:6831)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.LinearLayout.setChildFrame(LinearLayout.java:1119)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.LinearLayout.layoutVertical(LinearLayout.java:998)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.LinearLayout.onLayout(LinearLayout.java:918)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.view.View.layout(View.java:6831)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.FrameLayout.onLayout(FrameLayout.java:333)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.view.View.layout(View.java:6831)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.widget.FrameLayout.onLayout(FrameLayout.java:333)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.view.View.layout(View.java:6831)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.view.ViewRoot.performTraversals(ViewRoot.java:996)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.view.ViewRoot.handleMessage(ViewRoot.java:1633)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.os.Handler.dispatchMessage(Handler.java:99)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.os.Looper.loop(Looper.java:123)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
android.app.ActivityThread.main(ActivityThread.java:4338)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
java.lang.reflect.Method.invokeNative(Native Method)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
java.lang.reflect.Method.invoke(Method.java:521)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
07-28 14:49:25.398: ERROR/AndroidRuntime(8097): at
dalvik.system.NativeStart.main(Native Method)
这是很难找到的错误，因为在堆栈跟踪没有我的方法列出。因此，没有人知道什么时候该异常被抛出？感谢您的任何提示。
It's difficult to find the error, because in the stacktrace none of my methods is listed. So, does anyone know when this exception is thrown? Thanks for any hints.
推荐答案
您可以看到您的堆栈跟踪错误：
You can see the error in your stacktrace :
适配器的内容发生了变化 但ListView控件没有收到 通知。使确保内容 适配器不从改性 后台线程，但只能从 UI线程。
The content of the adapter has changed but ListView did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread.
您应该看看你的线程之一，并使其与您的UI线程同步。
You should look into one of your thread and make it synchronized with your UI thread.
做到这一点在Android上的方法是使用处理程序。
The way to do this in Android is with Handler.
http://developer.android.com/guide/appendix/常见问题/ commontasks.html＃线程
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