Błąd systemu Android: Nie można dodać okna - token zerowy nie jest dla aplikacji

Question

Hy. Starałem się stworzyć okno dialogowe z ostrzeżeniem, ale gdy uruchomię mojej aplikacji, jest wyjątek

09-26 12:43:21.949: E/AndroidRuntime(14618): FATAL EXCEPTION: main 
09-26 12:43:21.949: E/AndroidRuntime(14618): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewRootImpl.setView(ViewRootImpl.java:687) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:301) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:215) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.WindowManagerImpl$CompatModeWrapper.addView(WindowManagerImpl.java:140) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.app.Dialog.show(Dialog.java:278) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at com.example.stampp.UI.Rewards.DeleteRewardsFragment$1.onItemClick(DeleteRewardsFragment.java:80) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.widget.AdapterView.performItemClick(AdapterView.java:292) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.widget.AbsListView.performItemClick(AbsListView.java:1394) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.widget.AbsListView$PerformClick.run(AbsListView.java:3024) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.widget.AbsListView.onTouchEvent(AbsListView.java:3846) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.View.dispatchTouchEvent(View.java:5629) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1964) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1725) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1970) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1739) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1970) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1739) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1970) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1739) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1970) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1739) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1970) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1739) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1970) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1739) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1970) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1739) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:2062) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1400) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.app.Activity.dispatchTouchEvent(Activity.java:2369) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:2010) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.View.dispatchPointerEvent(View.java:5809) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:3130) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2658) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewRootImpl.processInputEvents(ViewRootImpl.java:1015) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2667) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.os.Handler.dispatchMessage(Handler.java:99) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.os.Looper.loop(Looper.java:137) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at android.app.ActivityThread.main(ActivityThread.java:4517) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at java.lang.reflect.Method.invokeNative(Native Method) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at java.lang.reflect.Method.invoke(Method.java:511) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:993) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:760) 
09-26 12:43:21.949: E/AndroidRuntime(14618): at dalvik.system.NativeStart.main(Native Method) 

To jest mój kod:

public class DeleteRewardsFragment extends Fragment{ 

private Context context; 

private FragmentsActivity activity; 

private ListView listView; 
private View myFragmentView; 
private DeleteRewardsAdapter adapter; 
private String[] values; 

@SuppressLint("ResourceAsColor") 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
     Bundle savedInstanceState) { 

    myFragmentView = inflater.inflate(R.layout.listview, container, false); 
    listView = (ListView) myFragmentView.findViewById(android.R.id.list); 


    activity = (FragmentsActivity) getActivity(); 
    context = activity.getApplicationContext(); 

    values = new String[4]; 

    adapter = new DeleteRewardsAdapter(context, values); 
    listView.setAdapter(adapter); 
    listView.setOnItemClickListener(deleteEvent); 

    return myFragmentView; 

} 

private OnItemClickListener deleteEvent = new OnItemClickListener() { 

    @Override 
    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, 
      long arg3) { 
     AlertDialog.Builder alertDialog = new AlertDialog.Builder(context); 
     alertDialog .setTitle("Jetzt löschen?"); 
     alertDialog .setMessage("Die in deisem Store gesammelten stampss gehen debei verloren!") 
       .setCancelable(false) 
       .setPositiveButton("Abbrechen", new DialogInterface.OnClickListener() { 

        @Override 
        public void onClick(DialogInterface dialog, int which) { 
         values = new String[values.length-1]; 
         adapter = new DeleteRewardsAdapter(context, values); 
         listView.setAdapter(adapter); 
        } 
       }) 
       .setNegativeButton("Löschen", new DialogInterface.OnClickListener() { 

        @Override 
        public void onClick(DialogInterface dialog, int which) { 
         dialog.cancel(); 
        } 
       }); 

     AlertDialog dialog = alertDialog.create(); 
     dialog.show(); 

    } 
}; 

} 

Czy ktoś może mi pomóc?

Answer 1

Aby dodać AlertDialog do swojego Activity lub Fragment musisz użyć swojej instancji Activity, a nie aplikacji, którą robisz w swoim kodzie. Stwórz swoją AlertDialog w ten sposób:

AlertDialog.Builder alertDialog = new AlertDialog.Builder(getActivity()); 

To powinno wystarczyć dla Ciebie! :)

Answer 2

Wyślij aktywność zamiast kontekstu.

AlertDialog.Builder alertDialog = new AlertDialog.Builder(activity); 

Answer 3

W moim przypadku starałem się tworzyć moje okno jak poniżej:

new Dialog(getApplicationContext()); 

więc musiałem zmienić na:

new Dialog(MyActivity.this); 

I zaczęło działać.

Answer 4

zmieniłem:

ProgressDialog(getApplicationContext()); 

do:

ProgressDialog(MainActivity.this); 

,

Answer 5

Poniżej są rzeczy, które możesz zrobić, aby dostać go od sprawy.

1. Zamiast

   context

   należy użyć

   ActivityName.this

2. jeśli używasz getApplicationContext(), a następnie użyć poniżej flagi przed użyciem getApplicationContext()

   dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT)

Dodaj następujące pozwolenie na Twój manifest:

<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" /> 

Answer 6

Zmieniłem getApplicationContext() do

activity.this 

będzie działać