Android中的进度对话框问题

我想在我的Activity中创建一个简单的ProgressDialog。我创造这样的：Android中的进度对话框问题

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    setContentView(R.layout.channellist); 

    final Context c=this; 

    t1=(TextView) findViewById(R.id.channellistStatus); 

    listView=(ListView) findViewById(R.id.channellist); 

    rc=RCManager.getInstance(); 

    chlistAdapter = new ChannelListAdapter(this,R.layout.channellist_row_lyt,clist); 

    listView.setAdapter(chlistAdapter); 

    t1.setText("No Channel List Found..."); 

    progDailog=ProgressDialog.show(this,"HI", "Loading"); 

    new Thread(new Runnable() { 

     @Override 
     public void run() { 
      try 
      { 
       Thread.sleep(3000); 
      } 
      catch (InterruptedException e) 
      { 
       e.printStackTrace(); 
      } 
      updateChannelList(); 
     } 
    }).start();

但它导致以下情况例外，即窗口管理BadToken异常。我不知道它为什么。请任何人都可以帮我解决这个问题吗？

05-23 16:56:44.573: ERROR/AndroidRuntime(2494): FATAL EXCEPTION: main 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494): java.lang.RuntimeException: Unable   to start activity   ComponentInfo{com.nds.fr.activities/com.nds.fr.activities.TabGroup2Activity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.nds.fr.activities/com.nds.fr.activities.ChannelListing}: android.view.WindowManager$BadTokenException: Unable to add window -- token [email protected] is not valid; is your activity running? 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.ActivityThread.startActivityNow(ActivityThread.java:2503) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:651) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.widget.TabHost.setCurrentTab(TabHost.java:323) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:129) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:453) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.view.View.performClick(View.java:2408) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.view.View$PerformClick.run(View.java:8818) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.os.Handler.handleCallback(Handler.java:587) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.os.Handler.dispatchMessage(Handler.java:92) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.os.Looper.loop(Looper.java:123) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at java.lang.reflect.Method.invokeNative(Native Method) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at java.lang.reflect.Method.invoke(Method.java:521) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:871) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at dalvik.system.NativeStart.main(Native Method) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.nds.fr.activities/com.nds.fr.activities.ChannelListing}: android.view.WindowManager$BadTokenException: Unable to add window -- token [email protected] is not valid; is your activity running? 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.ActivityThread.startActivityNow(ActivityThread.java:2503) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at com.nds.fr.activities.TabGroupActivity.startChildActivity(TabGroupActivity.java:65) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at com.nds.fr.activities.TabGroup2Activity.onCreate(TabGroup2Activity.java:10) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  ... 18 more 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494): Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token [email protected] is not valid; is your activity running? 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.view.ViewRoot.setView(ViewRoot.java:505) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:200) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:114) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.view.Window$LocalWindowManager.addView(Window.java:424) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.Dialog.show(Dialog.java:241) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.ProgressDialog.show(ProgressDialog.java:107) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.ProgressDialog.show(ProgressDialog.java:90) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.ProgressDialog.show(ProgressDialog.java:85) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at com.nds.fr.activities.ChannelListing.onCreate(ChannelListing.java:65) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
05-23 16:56:44.573: ERROR/AndroidRuntime(2494):  ... 25 more

来源

2011-05-23 bHaRaTh

你在哪里试图显示对话框？ – jkhouw1 2011-05-23 11:35:41

嗨在我的活动.in onCreate（） – bHaRaTh 2011-05-23 11:37:16

尝试把它放在onStart（），而不是。应用程序窗口尚未在onCreate中创建。 – jkhouw1 2011-05-23 11:40:04

progDailog=ProgressDialog.show(getParent(),"HI", "Loading");

来源

2011-05-23 11:42:31

嗨Tanmay。感谢它为我工作。但我不明白为什么我们应该在这里调用getParent（）。 – bHaRaTh 2011-05-23 11:48:39

我想你在这里使用'TabActivity'作为父类。 – 2011-05-23 11:50:22

是的，你是对的。我现在明白了。再次感谢你。 – bHaRaTh 2011-05-23 11:51:53

在活动对用户可见之前，您无法显示对话框。在onResume（）或onClickListener的某个按钮中调用显示。

来源

2011-05-23 11:39:42

感谢弗拉基米尔我会尝试它。 – bHaRaTh 2011-05-23 11:49:09

如果您创建一个新线程并将其设置为睡眠一段时间，则只有新线程会睡眠。这对你创建Activity的UI线程没有任何影响！而且，这不是一个好办法。

此外，您的活动变得可见之前无法显示对话框。试用onStart-方法。

来源

2011-05-23 11:53:09

Android中的进度对话框问题

回答

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