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我有一个发布的应用程式，并收到了来自崩溃堆栈跟踪：无法理解该堆栈跟踪
android.view.WindowManager$BadTokenException: Unable to add window -- token
[email protected] is not valid; is your activity running?
at android.view.ViewRoot.setView(ViewRoot.java:535)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:203)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:117)
at android.view.Window$LocalWindowManager.addView(Window.java:424)
at android.app.Dialog.show(Dialog.java:241)
at android.app.ProgressDialog.show(ProgressDialog.java:107)
at android.app.ProgressDialog.show(ProgressDialog.java:90)
at com.mytaxicontrol.MyTaxiControlActivity$executeGEO.void onPreExecute()(Unknown Source)
at android.os.AsyncTask.execute(AsyncTask.java:391)
at com.mytaxicontrol.MyTaxiControlActivity$37.void run()(Unknown Source)
at android.app.Activity.runOnUiThread(Activity.java:3743)
at com.mytaxicontrol.MyTaxiControlActivity.void geo()(Unknown Source)
貌似对话框不能显示进度。下面是相关的代码：
public void onPreExecute() {
if(isGeoRunning)return;
if (loading == null || !loading.isShowing())
loading = ProgressDialog.show(co, "",
"Retrieving Geolocation...", true);
}
注意，CO =这个和的onCreate（） 什么是我的问题已经初始化？
我可以对此做任何事吗？ – michaelsmith 2012-03-14 19:18:28
是的，在尝试添加窗口之前检查活动是否为空，或者在 – 2012-03-14 19:18:59
周围添加一个try ... catch块，这发生在我的主要活动中，所以我应该这样做：if（co！= null）... – michaelsmith 2012-03-14 19:20:07