Android Unable to add window Permission denied for this window type

Question

I m working on an app where I need to display a window with some info ON the Lock Screen  KeyGuard  without unlocking the phone  I figured I could probably do it with WindowManager LayoutParams TYPE KEYGUARD DIALOG  But every time my app crashes with the following error       android view WindowManager BadTokenException  Unable to add window   android view ViewRootImpl W 40ec8528 -- permission denied for this   window type   These posts  here  here and here  all give the same answer  To add the following permission in the Manifest file      android permission SYSTEM ALERT WINDOW   Solution that I have implemented but I am still getting the same error  Any idea of what I m doing wrong   Here are the permissions in my manifest file    lt  xml version  1 0  encoding  utf-8   gt   lt manifest xmlns android  http   schemas android com apk res android  package  com droidpilot keyguardwindow   gt    lt uses-sdk     android minSdkVersion  16      android targetSdkVersion  21    gt    lt uses-permission android name  android permission SYSTEM ALERT WINDOW    gt   lt uses-permission android name  android permission INTERNET    gt   lt uses-permission android name  android permission ACCESS NETWORK STATE    gt   lt uses-permission android name  android permission RECEIVE BOOT COMPLETED    gt   lt uses-permission android name  android permission WRITE EXTERNAL STORAGE    gt   lt uses-permission android name  android permission READ PHONE STATE    gt   lt uses-permission android name  android permission READ EXTERNAL STORAGE    gt   lt uses-permission android name  android permission VIBRATE    gt    And this is the code I use to add the Window to the lock screen  WindowManager wm    WindowManager  getSystemService WINDOW SERVICE       LayoutInflater mInflater    LayoutInflater  getSystemService Context LAYOUT INFLATER SERVICE        mView   mInflater inflate R layout lock screen notif  null        WindowManager LayoutParams params   new WindowManager LayoutParams              WindowManager LayoutParams WRAP CONTENT              WindowManager LayoutParams WRAP CONTENT              WindowManager LayoutParams TYPE KEYGUARD DIALOG              WindowManager LayoutParams FLAG SHOW WHEN LOCKED                       WindowManager LayoutParams FLAG TURN SCREEN ON                       WindowManager LayoutParams FLAG KEEP SCREEN ON              PixelFormat TRANSLUCENT             wm addView mView  params     Anybody got any idea   P S  I m testing on an HTC Desire 620 DS running Android 4 4 2

User · Accepted Answer

For what should be completely obvious reasons, ordinary Apps are not allowed to create arbitrary windows on top of the lock screen. What do you think I could do if I created a window on your lockscreen that could perfectly imitate the real lockscreen so you couldn't tell the difference?

The technical reason for your error is the use of the TYPE_KEYGUARD_DIALOG flag - it requires android.permission.INTERNAL_SYSTEM_WINDOW which is a signature-level permission. This means that only Apps signed with the same certificate as the creator of the permission can use it.

The creator of android.permission.INTERNAL_SYSTEM_WINDOW is the Android system itself, so unless your App is part of the OS, you don't stand a chance.

There are well defined and well documented ways of notifying the user of information from the lockscreen. You can create customised notifications which show on the lockscreen and the user can interact with them.

User · Answer

I guess you should differentiate the target  before and after Oreo   int LAYOUT FLAG  if  Build VERSION SDK INT  gt   Build VERSION CODES O        LAYOUT FLAG   WindowManager LayoutParams TYPE APPLICATION OVERLAY    else       LAYOUT FLAG   WindowManager LayoutParams TYPE PHONE     params   new WindowManager LayoutParams      WindowManager LayoutParams WRAP CONTENT      WindowManager LayoutParams WRAP CONTENT      LAYOUT FLAG      WindowManager LayoutParams FLAG NOT TOUCHABLE   WindowManager LayoutParams FLAG LAYOUT IN SCREEN   WindowManager LayoutParams FLAG NOT FOCUSABLE      PixelFormat TRANSLUCENT

User · Answer

try this code working perfectly    int layout parms       if  Build VERSION SDK INT  gt   Build VERSION CODES O                     layout parms   WindowManager LayoutParams TYPE APPLICATION OVERLAY               else                layout parms   WindowManager LayoutParams TYPE PHONE              yourparams   new WindowManager LayoutParams                     WindowManager LayoutParams WRAP CONTENT              WindowManager LayoutParams WRAP CONTENT              layout parms              WindowManager LayoutParams FLAG NOT TOUCHABLE   WindowManager LayoutParams FLAG LAYOUT IN SCREEN   WindowManager LayoutParams FLAG NOT FOCUSABLE              PixelFormat TRANSLUCENT

User · Answer

I did manage to finally display a window on the lock screen with the use of TYPE SYSTEM OVERLAY instead of TYPE KEYGUARD DIALOG  This works as expected and adds the window on the lock screen   The problem with this is that the window is added on top of everything it possibly can  That is  the window will even appear on top of your keypad pattern lock in case of secure lock screens  In the case of an unsecured lock screen  it will appear on top of the notification tray if you open it from the lock screen   For me  that is unacceptable  I hope that this may help anybody else facing this problem

User · Answer

The Main Reason for the denying permission is that we don   t have permission for drawing over another apps We have to provide the permission for the Drawing over other apps that can be done by the following code  Request code for Permission       public static int ACTION MANAGE OVERLAY PERMISSION REQUEST CODE   5469    add this in your MainActivity    if  Build VERSION SDK INT  gt   Build VERSION CODES M  amp  amp   Settings canDrawOverlays this                 askPermission          private void askPermission             Intent intent  new Intent Settings ACTION MANAGE OVERLAY PERMISSION  Uri parse  package   getPackageName              startActivityForResult intent ACTION MANAGE OVERLAY PERMISSION REQUEST CODE        Add this also       RequiresApi api   Build VERSION CODES M       Override     protected void onActivityResult int requestCode  int resultCode   Nullable Intent data            super onActivityResult requestCode  resultCode  data           if resultCode    ACTION MANAGE OVERLAY PERMISSION REQUEST CODE               if  Settings canDrawOverlays this                    askPermission

User · Answer

I tried my best to try all the examples available for this issue  Finally I got the answer for this I don know how much is it reliable but my app is not crashing now   windowManager    WindowManager getSystemService WINDOW SERVICE         here is all the science of params     final LayoutParams myParams   new LayoutParams              WindowManager LayoutParams WRAP CONTENT              WindowManager LayoutParams WRAP CONTENT              LayoutParams TYPE SYSTEM ERROR              WindowManager LayoutParams FLAG SHOW WHEN LOCKED                       WindowManager LayoutParams FLAG TURN SCREEN ON                       WindowManager LayoutParams FLAG KEEP SCREEN ON              PixelFormat TRANSLUCENT          In your manifest file just give the permission    lt uses-permission android name  android permission SYSTEM ALERT WINDOW   gt    Addition to this you can also check for the API level if its   23 then   if Build VERSION SDK INT  gt   23        if   Settings canDrawOverlays Activity this             Intent intent   new Intent Settings ACTION MANAGE OVERLAY PERMISSION                  Uri parse  package     getPackageName              startActivityForResult intent  1234                       else       Intent intent   new Intent Activity this  Service class       startService intent       I hope it helps someone somewhere  Full example https   anam-android-codes blogspot in  m 1

User · Answer

if  Build VERSION SDK INT  lt  Build VERSION CODES O        WindowManager LayoutParams params   new WindowManager LayoutParams              WindowManager LayoutParams WRAP CONTENT              WindowManager LayoutParams WRAP CONTENT              WindowManager LayoutParams TYPE PHONE              WindowManager LayoutParams FLAG NOT FOCUSABLE                       WindowManager LayoutParams FLAG NOT TOUCH MODAL                       WindowManager LayoutParams FLAG WATCH OUTSIDE TOUCH                       WindowManager LayoutParams FLAG LAYOUT NO LIMITS              PixelFormat TRANSLUCENT        params gravity   Gravity START   Gravity TOP      params x   left      params y   top      windowManager addView view  params      else       WindowManager LayoutParams params   new WindowManager LayoutParams              WindowManager LayoutParams WRAP CONTENT              WindowManager LayoutParams WRAP CONTENT              WindowManager LayoutParams TYPE APPLICATION OVERLAY              WindowManager LayoutParams FLAG NOT FOCUSABLE                       WindowManager LayoutParams FLAG NOT TOUCH MODAL                       WindowManager LayoutParams FLAG WATCH OUTSIDE TOUCH                       WindowManager LayoutParams FLAG LAYOUT NO LIMITS              PixelFormat TRANSLUCENT         params gravity   Gravity START   Gravity TOP      params x   left      params y   top      windowManager addView view  params

User · Answer

I struggled to find the working solution with ApplicationContext and TYPE SYSTEM ALERT and found confusing solutions  In case you want the dialog should be opened from any activity even the dialog is a singleton you have to use getApplicationContext    and if want the dialog should be TYPE SYSTEM ALERT you will need the following steps   first get the instance of dialog with correct theme  also you need to manage the version compatibility as I did in my following snippet   AlertDialog Builder builder   new AlertDialog Builder getApplicationContext    R style Theme AppCompat Light     After setting the title  message and buttons you have to build the dialog as   AlertDialog alert   builder create      Now the type plays the main roll here  since this is the reason of crash  I handled the compatibility as following           if  Build VERSION SDK INT  gt   Build VERSION CODES O            alert getWindow   setType WindowManager LayoutParams TYPE APPLICATION OVERLAY - 1          else if  Build VERSION SDK INT  gt   Build VERSION CODES KITKAT            alert getWindow   setType WindowManager LayoutParams TYPE SYSTEM ALERT           Note  if you are using a custom dialog with AppCompatDialog as below   AppCompatDialog dialog   new AppCompatDialog getApplicationContext    R style Theme AppCompat Light     you can directly define your type to the AppCompatDialog instance as following           if  Build VERSION SDK INT  gt   Build VERSION CODES O            dialog getWindow   setType WindowManager LayoutParams TYPE APPLICATION OVERLAY - 1          else if  Build VERSION SDK INT  gt   Build VERSION CODES KITKAT            dialog getWindow   setType WindowManager LayoutParams TYPE SYSTEM ALERT           Don t forget to add the manifest permission    lt uses-permission android name  android permission SYSTEM ALERT WINDOW   gt

User · Answer

Firstly you make sure you have add permission in manifest file    lt uses-permission android name  android permission SYSTEM ALERT WINDOW   gt    Check if the application has draw over other apps permission or not  This permission is by default available for API lt 23  But for API   23 you have to ask for the permission in runtime    if  Build VERSION SDK INT  gt   Build VERSION CODES M  amp  amp   Settings canDrawOverlays this          Intent intent   new Intent Settings ACTION MANAGE OVERLAY PERMISSION              Uri parse  package     getPackageName          startActivityForResult intent  1        Use This code   public class ChatHeadService extends Service    private WindowManager mWindowManager  private View mChatHeadView   WindowManager LayoutParams params   public ChatHeadService         Override public IBinder onBind Intent intent        return null      Override public void onCreate         super onCreate         Language language   new Language          Inflate the chat head layout we created     mChatHeadView   LayoutInflater from this  inflate R layout dialog incoming call  null         if  Build VERSION SDK INT  lt  Build VERSION CODES O            params   new WindowManager LayoutParams                  WindowManager LayoutParams WRAP CONTENT                  WindowManager LayoutParams WRAP CONTENT                  WindowManager LayoutParams TYPE PHONE                  WindowManager LayoutParams FLAG NOT FOCUSABLE                           WindowManager LayoutParams FLAG NOT TOUCH MODAL                           WindowManager LayoutParams FLAG WATCH OUTSIDE TOUCH                           WindowManager LayoutParams FLAG LAYOUT NO LIMITS                  PixelFormat TRANSLUCENT            params gravity   Gravity CENTER HORIZONTAL   Gravity TOP          params x   0          params y   100          mWindowManager    WindowManager  getSystemService WINDOW SERVICE           mWindowManager addView mChatHeadView  params          else           params   new WindowManager LayoutParams                  WindowManager LayoutParams WRAP CONTENT                  WindowManager LayoutParams WRAP CONTENT                  WindowManager LayoutParams TYPE APPLICATION OVERLAY                  WindowManager LayoutParams FLAG NOT FOCUSABLE                           WindowManager LayoutParams FLAG NOT TOUCH MODAL                           WindowManager LayoutParams FLAG WATCH OUTSIDE TOUCH                           WindowManager LayoutParams FLAG LAYOUT NO LIMITS                  PixelFormat TRANSLUCENT             params gravity   Gravity CENTER HORIZONTAL   Gravity TOP          params x   0          params y   100          mWindowManager    WindowManager  getSystemService WINDOW SERVICE           mWindowManager addView mChatHeadView  params              TextView tvTitle mChatHeadView findViewById R id tvTitle       tvTitle setText  Incoming Call           Set the close button      Button btnReject    Button  mChatHeadView findViewById R id btnReject       btnReject setText language getText R string reject        btnReject setOnClickListener new View OnClickListener              Override         public void onClick View v                  close the service and remove the chat head from the window             stopSelf                             Drag and move chat head using user s touch action      final Button btnAccept    Button  mChatHeadView findViewById R id btnAccept       btnAccept setText language getText R string accept          LinearLayout linearLayoutMain mChatHeadView findViewById R id linearLayoutMain          linearLayoutMain setOnTouchListener new View OnTouchListener             private int lastAction          private int initialX          private int initialY          private float initialTouchX          private float initialTouchY            Override         public boolean onTouch View v  MotionEvent event                switch  event getAction                      case MotionEvent ACTION DOWN                         remember the initial position                      initialX   params x                      initialY   params y                         get the touch location                     initialTouchX   event getRawX                        initialTouchY   event getRawY                         lastAction   event getAction                        return true                  case MotionEvent ACTION UP                        As we implemented on touch listener with ACTION MOVE                        we have to check if the previous action was ACTION DOWN                       to identify if the user clicked the view or not                      if  lastAction    MotionEvent ACTION DOWN                              Open the chat conversation click                          Intent intent   new Intent ChatHeadService this  HomeActivity class                           intent addFlags Intent FLAG ACTIVITY NEW TASK                           startActivity intent                              close the service and remove the chat heads                         stopSelf                                              lastAction   event getAction                        return true                  case MotionEvent ACTION MOVE                        Calculate the X and Y coordinates of the view                      params x   initialX    int   event getRawX   - initialTouchX                       params y   initialY    int   event getRawY   - initialTouchY                          Update the layout with new X  amp  Y coordinate                     mWindowManager updateViewLayout mChatHeadView  params                       lastAction   event getAction                        return true                            return false                        Override public void onDestroy         super onDestroy        if  mChatHeadView    null  mWindowManager removeView mChatHeadView

User · Answer

For Android API level of 8 0 0  you should use   WindowManager LayoutParams TYPE APPLICATION OVERLAY   instead of   LayoutParams TYPE TOAST or TYPE APPLICATION PANEL   or SYSTEM ALERT

User · Answer

LayoutParams TYPE PHONE is deprecated  I have updated my code like these   parameters   if  Build VERSION SDK INT  gt  25            LayoutParams                  minHW   2   3  minHW   2   3                  LayoutParams TYPE APPLICATION OVERLAY                  LayoutParams FLAG NOT FOCUSABLE                  PixelFormat TRANSLUCENT       else           LayoutParams                  minHW   2   3  minHW   2   3                  LayoutParams TYPE PHONE                  LayoutParams FLAG NOT FOCUSABLE                  PixelFormat TRANSLUCENT          LayoutParams TYPE APPLICATION OVERLAY requires api level 26 or above

User · Answer

Search      Draw over other apps   in your setting and enable your app  For Android 8 Oreo  try      Settings   Apps  amp  Notifications   App info   Display over other apps     Enable

User · Answer

I just added simple view to WindowManager with the following steps    Create one layout file to show dummy layout in my case  Add permission in manifest and dynamically       1  Show view private void showCustomPopupMenu         windowManager    WindowManager getSystemService WINDOW SERVICE          LayoutInflater layoutInflater    LayoutInflater getSystemService Context LAYOUT INFLATER SERVICE          View view   layoutInflater inflate R layout dummy layout  null       ViewGroup valetModeWindow    ViewGroup  View inflate this  R layout dummy layout  null       int LAYOUT FLAG      if  Build VERSION SDK INT  gt   Build VERSION CODES O            LAYOUT FLAG   WindowManager LayoutParams TYPE APPLICATION OVERLAY        else           LAYOUT FLAG   WindowManager LayoutParams TYPE PHONE            WindowManager LayoutParams params new WindowManager LayoutParams          WindowManager LayoutParams WRAP CONTENT          WindowManager LayoutParams WRAP CONTENT          LAYOUT FLAG          WindowManager LayoutParams FLAG NOT FOCUSABLE          PixelFormat TRANSLUCENT        params gravity  Gravity CENTER Gravity CENTER      params x 0      params y 0      windowManager addView valetModeWindow  params         2  Get permissions by asking if   Settings canDrawOverlays this         Intent intent   new Intent Settings ACTION MANAGE OVERLAY PERMISSION  Uri parse  package     getPackageName          startActivityForResult intent  1234       With this you can add a view to WM   Tested in Pie

User · Answer

if you use apiLevel  gt   19  don t use  WindowManager LayoutParams type   WindowManager LayoutParams TYPE SYSTEM ALERT    which gets the following error      android view WindowManager BadTokenException  Unable to add window android view ViewRootImpl W 40ec8528 -- permission denied for this window type   Use this instead   LayoutParams TYPE TOAST or TYPE APPLICATION PANEL

User · Answer

Make sure WindowManager LayoutParams TYPE SYSTEM ERROR is added for OS version  lt  Oreo as it s been deprecated

User · Answer

change your flag Windowmanger flag  TYPE SYSTEM OVERLAY  to  TYPE APPLICATION OVERLAY  in your project to make compatible with Android O  WindowManager LayoutParams TYPE PHONE to WindowManager LayoutParams TYPE APPLICATION OVERLAY

[android] Android: Unable to add window. Permission denied for this window type

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