Android 开发 Tip 5 -- View xxx not attached to window manager

来源：互联网发布：美国手机音乐软件编辑：程序博客网时间：2024/06/04 01:28

转载请注明出处：http://blog.csdn.net/crazy1235/article/details/70195049

错误信息

java.lang.IllegalArgumentException: View=DecorView@f4179d7[title] not attached to window managerat android.view.WindowManagerGlobal.findViewLocked(WindowManagerGlobal.java:473)at android.view.WindowManagerGlobal.removeView(WindowManagerGlobal.java:382)at android.view.WindowManagerImpl.removeViewImmediate(WindowManagerImpl.java:124)at android.app.Dialog.dismissDialog(Dialog.java:363)at android.app.Dialog.dismiss(Dialog.java:346)at com.jacksen.demo.view.alertdialog.TestAlertDialogActivity$1.run(TestAlertDialogActivity.java:78)at android.os.Handler.handleCallback(Handler.java:751)at android.os.Handler.dispatchMessage(Handler.java:95)at android.os.Looper.loop(Looper.java:154)at android.app.ActivityThread.main(ActivityThread.java:6119)at java.lang.reflect.Method.invoke(Native Method)at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

这类错误一般是由于调用Dialog.dismiss()时，activity已经destory了。

常见场景一般都是在做异步操作（网络请求等）时，在回调函数中关闭对话框。

还原现场

progressDialog = ProgressDialog.show(this, "title", "loading...");MyHandler handler = new MyHandler(this);handler.postDelayed(new Runnable() {    @Override    public void run() {         progressDialog.dismiss();    }}, 3000);handler.sendEmptyMessageDelayed(1, 1000);

private static class MyHandler extends Handler {        private WeakReference<TestAlertDialogActivity> reference;        public MyHandler(TestAlertDialogActivity activity) {            this.reference = new WeakReference<TestAlertDialogActivity>(activity);        }        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            if (msg.what == 1 && reference.get() != null && !reference.get().isFinishing()) {                reference.get().finish();            }        }    }

解决方案

知道了问题原因，解决也很简单。在dismiss的时候先判断activity是否还存在。但是此时也要注意另外一个问题。即是你判断了，也有可能出现另外一个错误，就是当你dismiss的时候，可能会出现 “xxx that was originally added here”!

所以最好的方式是在关闭activity的时候，及时调用dismiss来解除对ProgressDialog等Dialog的引用 ！

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