To add a custom view using WindowManager

When writing mobile phone guard, the user calls | To answer the phone needs to show the number of attribution, and then there are some anomalies, leaving a mark here, hoping to help friends:

Bug Tutorials

When using view = View.inflate (this, r.layout.ui_toast, null), Wm.addview error occurred after obtaining the View object:

10-12 14:29:06.166:e/androidruntime (1268): caused By:android.view.windowmanager$badtokenexception:unable to add window [email protected]--Permission denied for this window type

Workaround:

Use another method to obtain:

Layoutinflater Inflater = (layoutinflater) getsystemservice (Context.layout_inflater_service); Mdesktoplayout = inflater.inflate (R.layout.volume_panel, NULL);

Full code:

layoutinflater inflater =  (Layoutinflater) Getsystemservice (Context.layout_inflater_service);  mdesktoplayout = inflater.inflate (r.layout.volume_panel, null); //  get system form   mwindowmanager =  (WindowManager)  getapplicationcontext (). Getsystemservice (WINDOW_SERVICE);  //  layout style of the form  mlayoutparams = new windowmanager.layoutparams (); //  Set the form display Type ――type_system_alert (System hint)  mlayoutparams.type = windowmanager.layoutparams.type_system_ alert; //  set the form focus and touch:  // flag_not_focusable (Cannot get key input focus)  mlayoutparams.flags =  WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE; //  Set the display mode  mlayoutparams.format =  PixelFormat.RGBA_8888; //  to set the alignment method  mlayoutparams.gravity = gravity.top |  Gravity.LEFT; //  Set form width and height  mLayoutParams.width =  Windowmanager.layoutparams.wrap_content; mlayoutparams.height = windowmanager.layoutparams.wrap_content; //  set the position of the form to display otherwise the  mlayoutparams.x is displayed in the center of the screen  = 50; mlayoutparams.y = 50; mwindowmanager.addview (mDesktopLayout,  Mlayoutparams);

Summary of issues

Neither of these shows a window that will fire the current activity's OnPause () event. It is said that you can start a window-style activity, but the display will fire the current window's OnPause () event, how exactly did not try.

Recommended style

<?xml version= "1.0"  encoding= "Utf-8"?>  <resources>       <style          name= "SelectorDialog"            parent= "@Android: Style/theme.dialog" >           <item name= "Android:windowframe" > @null </item> <!--border-->          <item name= "Android: Windowisfloating ">true</item><!--is on the activity-->           <item name= "Android:windowistranslucent" >false</item><!--Translucent-->           <item name= "Android:windownotitle" >true</ item><!--Untitled-->          <!--<item name= "Android:windowbackground"; @drawable/selector_dialog_bg</item> Background Transparent-->           <item name= "android:backgrounddimenabled" >false</item><!--fuzzy-->           <item name= "Android:backgrounddimamount" >0.6</item>       </style>  </resources>

OK, thank you for breaking the Breaking Dawn blog

To add a custom view using WindowManager