title: ProgressDialog giving error, while I am using in onCreate() of activity that is in activity group
body: <p>My code is as following .</p>
  
  <pre><code>public void onCreate(Bundle savedInstanceState) {
      ................
      ................
      showDialog(CONTACT_DIALOG_ID);
              Thread t = new Thread() {
                  public void run(){
                      try{
  
                          sleep(50000);
                      } catch(Exception e) {
                          Log.e("TAG","Exception caught in thread:" + e.toString());
                          //e.printStackTrace();
                      } finally {
                          try{
                              dismissDialog(CONTACT_DIALOG_ID);
                          } catch (IllegalArgumentException e) {
                              Log.w("TAG","Dialog does not exist");
                          }
                      }
                      //finish();  
                  }
              };
              t.start();
      ................
      ................
  }
  </code></pre>
  
  <p>and dialog is as ..</p>
  
  <pre><code> @Override
      protected Dialog onCreateDialog(int id) {
          Dialog dialog = null;
          switch (id) {
          case CONTACT_DIALOG_ID:
              dialog = new ProgressDialog(this);
              ((ProgressDialog) dialog).setMessage("Loading, please wait...");
              break;
          }
          return dialog;
      }
  </code></pre>
  
  <p>Dialog is not displaying and I am getting errors as below </p>
  
  <pre><code>03-09 15:45:06.887: WARN/WindowManager(60): Attempted to add application window with unknown token android.os.BinderProxy@43c212c8.  Aborting.
  03-09 15:45:06.947: DEBUG/AndroidRuntime(1119): Shutting down VM
  03-09 15:45:06.957: WARN/dalvikvm(1119): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
  03-09 15:45:06.957: ERROR/AndroidRuntime(1119): Uncaught handler: thread main exiting due to uncaught exception
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119): java.lang.IllegalStateException: Could not execute method of the activity
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.View$1.onClick(View.java:2031)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.View.performClick(View.java:2364)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.View.onTouchEvent(View.java:4179)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.widget.TextView.onTouchEvent(TextView.java:6541)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.View.dispatchTouchEvent(View.java:3709)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.app.Activity.dispatchTouchEvent(Activity.java:2061)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.app.Activity.dispatchTouchEvent(Activity.java:2061)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.app.Activity.dispatchTouchEvent(Activity.java:2061)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.os.Handler.dispatchMessage(Handler.java:99)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.os.Looper.loop(Looper.java:123)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.app.ActivityThread.main(ActivityThread.java:4363)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at java.lang.reflect.Method.invokeNative(Native Method)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at java.lang.reflect.Method.invoke(Method.java:521)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at dalvik.system.NativeStart.main(Native Method)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119): Caused by: java.lang.reflect.InvocationTargetException
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at com.SmartsourcingGlobal.Go2TagFree.TagsActivityAll.clickOnTag1(TagsActivityAll.java:109)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at java.lang.reflect.Method.invokeNative(Native Method)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at java.lang.reflect.Method.invoke(Method.java:521)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.view.View$1.onClick(View.java:2026)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     ... 40 more
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.SmartsourcingGlobal.Go2TagFree/com.SmartsourcingGlobal.Go2TagFree.TagsActivityFiltered}: android.view.WindowManager$BadTokenException: Unable to add window -- token android.app.LocalActivityManager$LocalActivityRecord@43d42e70 is not valid; is your activity running?
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.app.ActivityThread.startActivityNow(ActivityThread.java:2335)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)
  03-09 15:45:07.087: ERROR/AndroidRuntime(1119):     at com.SmartsourcingGlobal.Go2TagFree.TagsActivityAll.filterTag(TagsActivityAll.java:148)
  </code></pre>
  
  <p>What is problem in my code?</p>