ProgressDialog: как предотвратить утечку окна

Я использую ProgressDialog, чтобы предотвратить взаимодействие пользователя, пока устройство загружает материалы из Интернета.

все работало нормально пока моему клиенту не удалось выдать эту ошибку:

"07-06 17:10:50.363: ERROR/WindowManager(8821): Activity android.pixelrain.framework.PixelRainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@463f3e50 that was originally added here
07-06 17:10:50.363: ERROR/WindowManager(8821): android.view.WindowLeaked: Activity android.pixelrain.framework.PixelRainActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@463f3e50 that was originally added here
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.view.ViewRoot.<init>(ViewRoot.java:251)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.view.Window$LocalWindowManager.addView(Window.java:424)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.app.Dialog.show(Dialog.java:241)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.app.ProgressDialog.show(ProgressDialog.java:107)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.app.ProgressDialog.show(ProgressDialog.java:90)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.pixelrain.HTTPHelper.DraftHelper.getDraft(DraftHelper.java:70)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.pixelrain.online.OnlineRetriver.getDraft(OnlineRetriver.java:312)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.pixelrain.HTTPHelper.DraftButtonGL.loadDraft(DraftButtonGL.java:72)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.pixelrain.HTTPHelper.DraftButtonGL.isTouched(DraftButtonGL.java:89)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.pixelrain.opengl.views.game.QuickStartGL.touchEnded(QuickStartGL.java:160)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.pixelrain.game.GameHandler.onTouchEvent(GameHandler.java:277)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.pixelrain.opengl.GLSurfaceViewChipmunk.onTouchEvent(GLSurfaceViewChipmunk.java:27)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.view.View.dispatchTouchEvent(View.java:3765)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:944)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:944)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:944)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1701)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1116)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.app.Activity.dispatchTouchEvent(Activity.java:2093)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1685)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.view.ViewRoot.handleMessage(ViewRoot.java:1802)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.os.Handler.dispatchMessage(Handler.java:99)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.os.Looper.loop(Looper.java:144)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at android.app.ActivityThread.main(ActivityThread.java:4937)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at java.lang.reflect.Method.invokeNative(Native Method)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at java.lang.reflect.Method.invoke(Method.java:521)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-06 17:10:50.363: ERROR/WindowManager(8821):     at dalvik.system.NativeStart.main(Native Method)"

, и я понятия не имею, как ее исправить.

есть идеи, что вызывает эту ошибку и как ее решить?

В журнале ошибка прослеживается до этой строки:

    progressDialog = ProgressDialog.show(PixelRainActivity.staticThis, "",PixelRainActivity.staticThis.getResources().getString( R.string.draftProgressMessage), true);

решит ли это проблему, если я изменил его на это:

this.runOnUiThread(new Runnable() {
            public void run() {
                progressDialog = ProgressDialog.show(PixelRainActivity.staticThis, "",PixelRainActivity.staticThis.getResources().getString( R.string.draftProgressMessage), true);
            }
        });