android View未附加到窗口管理器 [英] android View not attached to window manager

问题描述

我有以下一些例外情况:

I am having some of the following exceptions:

java.lang.IllegalArgumentException: View not attached to window manager
at android.view.WindowManagerImpl.findViewLocked(WindowManagerImpl.java:355)
at android.view.WindowManagerImpl.updateViewLayout(WindowManagerImpl.java:191)
at android.view.Window$LocalWindowManager.updateViewLayout(Window.java:428)
at android.app.Dialog.onWindowAttributesChanged(Dialog.java:596)
at android.view.Window.setDefaultWindowFormat(Window.java:1013)
at com.android.internal.policy.impl.PhoneWindow.access$700(PhoneWindow.java:86)
at com.android.internal.policy.impl.PhoneWindow$DecorView.drawableChanged(PhoneWindow.java:1951)
at com.android.internal.policy.impl.PhoneWindow$DecorView.fitSystemWindows(PhoneWindow.java:1889)
at android.view.ViewRoot.performTraversals(ViewRoot.java:727)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1633)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4338)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
at dalvik.system.NativeStart.main(Native Method)

我用谷歌搜索了一下，发现它与弹出窗口和转动屏幕有关，但没有参考我的代码.

I have googled it and see that it has something to do with popups and turning the screen, but there is no reference to my code.

问题是:

1. 有没有办法找出来正是当这个问题是发生了吗?
2. 除了转动屏幕之外，是否还有其他事件或操作会触发此错误?
3. 如何防止这种情况发生?

推荐答案

我遇到了这个问题，在屏幕方向改变时，Activity 在 AsyncTask 之前完成，进度对话框完成.我似乎通过将对话框设置为 null onPause() 来解决这个问题，然后在解除之前在 AsyncTask 中检查它.

I had this issue where on a screen orientation change, the activity finished before the AsyncTask with the progress dialog completed. I seemed to resolve this by setting the dialog to null onPause() and then checking this in the AsyncTask before dismissing.

@Override
public void onPause() {
    super.onPause();

    if ((mDialog != null) && mDialog.isShowing())
        mDialog.dismiss();
    mDialog = null;
}

... 在我的 AsyncTask 中:

... in my AsyncTask:

protected void onPreExecute() {
    mDialog = ProgressDialog.show(mContext, "", "Saving changes...",
            true);
}

protected void onPostExecute(Object result) {
   if ((mDialog != null) && mDialog.isShowing()) { 
        mDialog.dismiss();
   }
}

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