Android Unable to add window -- token null is not for an application exception

Question

I get the following Android exception when I try to open a dialog  Can someone please help me understand what is going on and how can I fix this problem   android view WindowManager BadTokenException     Unable to add window -- token null is not for an application     at android view ViewRoot setView ViewRoot java 509      at android view WindowManagerImpl addView WindowManagerImpl java 177      at android view WindowManagerImpl addView WindowManagerImpl java 91      at android app Dialog show Dialog java 241

User · Answer

I tried with this in the context field   this getActivity   getParent     and it works fine for me  This was from a class which extends from  Fragment    public class filtro extends Fragment

User · Answer

Try getParent   at the argument place of context like new AlertDialog Builder getParent     Hope it will work  it worked for me

User · Answer

Use this and context not worked for me  but MyActivityName this worked  Hope this helps anyone who need it

User · Answer

I m guessing - are you trying to create Dialog using    getApplicationContext    mContext which is passed by activity    if You displaying dialog non activity class then you have to pass activity as a parameter   Activity activity YourActivity this    Now it will be work great   If you find any trouble then let me know

User · Answer

Hello there if you are using adapter there might be a chance  All you need to know when you used any dialog in adapter getContext   context or activity won t work sometime   Here is the trick I used      v getRootView   getContext   where v is the view object you are referencing  Eg                         Override             public void onClick View v                       TODO Auto-generated method stub                 new DatePickerDialog v getRootView   getContext    date  myCalendar                          get Calendar YEAR   myCalendar get Calendar MONTH                           myCalendar get Calendar DAY OF MONTH   show                                If you are getting this problem because of alert dialog  Refer  here  1  But it is same concept       1   https   stackoverflow com questions 6367771 displaying-alertdialog-inside-a-custom-listadapter-class

User · Answer

I got this exception  when I tried to open Progress Dialog under Cordova Plugin by using below two cases    new ProgressDialog this cordova getActivity   getParent     new ProgressDialog this cordova getActivity   getApplicationContext       Later changed like this   new ProgressDialog this cordova getActivity      Its working fine for me

User · Answer

I got the same exception  what i do to fix this is to pass instance of the dialog  as parameter into function and use it instead of pass only context then using getContext    this solution solve my problem  hope it can help

User · Answer

In my case I was trying to create my dialog like this   new Dialog getApplicationContext       So I had to change for   new Dialog this     And it works fine for me

User · Answer

I m guessing - are you trying to create Dialog with an application context  Something like this   new Dialog getApplicationContext       This is wrong  You need to use an Activity context   You have to try like   new Dialog YourActivity this

User · Answer

You can continue to use getApplicationContext    but before use  you should add this flag  dialog getWindow   setType WindowManager LayoutParams TYPE SYSTEM ALERT   and the error will not show   And don t forget to add permission    lt uses-permission android name  android permission SYSTEM ALERT WINDOW    gt

User · Answer

I solved this error by add below user-permission in AndroidManifest xml     lt uses-permission android name  android permission SYSTEM ALERT WINDOW    gt    Also  Initialize Alert dialog with Activity Name   AlertDialog Builder builder   new AlertDialog Builder YourActivity this     For More Details  visit    How to create Alert Dialog in Android

[android] Android 'Unable to add window -- token null is not for an application' exception

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