How to change the black color in Android dialogs or drawer menu -

in android, when show alert dialog, progress dialog, open drawer , etc, seems have transparent black layer on screen, kind of dialog, pic:

my goal changing transparent black layer, not background of dialog, see picture:

how change color of transparent black layer red or color? example in xml or code in java

this code myexitdialog class

public class myexitdialog extends dialog implements android.view.view.onclicklistener {     databasehandler userdb;      public activity c;     public dialog d;     public button yes, no;      public myexitdialog(activity a)     {         super(a);         this.c = a;     }      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         requestwindowfeature(window.feature_no_title);         setcontentview(r.layout.mydialog);         yes = (button) findviewbyid(r.id.id_exit_yes);         no = (button) findviewbyid(r.id.id_exit_no);         yes.setonclicklistener(this);         no.setonclicklistener(this);     }      @override     public void onclick(view v)     {         switch (v.getid()) {             case r.id.id_exit_yes:                 //c.finish();                 draweractivity.userdb=new databasehandler(myexitdialog.this.getcontext());                 draweractivity.userdb.open();                 draweractivity.userdb.logout();                 draweractivity.userdb.close();                 draweractivity.changedraweritems("logout");                 break;             case r.id.id_exit_no:                 dismiss();                 break;             default:                 break;         }         dismiss();      } } 

and how use that:

@override public boolean onnavigationitemselected(menuitem item) {     // handle navigation view item clicks here.      int id = item.getitemid();     fragment myfragment = null;      view myview;     typeface tf = typeface.createfromasset(getassets(), "fonts/byekan.ttf");      if (id == r.id.nav_home) {      } else if (id == r.id.nav_register) {       } else if (id == r.id.nav_change) {      } else if (id == r.id.nav_login) {      } else if (id == r.id.nav_factors) {      } else if (id == r.id.nav_logout) {         myexitdialog mydialog = new myexitdialog(draweractivity.this);         mydialog.show();     }     drawerlayout drawer = (drawerlayout) findviewbyid(r.id.drawer_layout);     drawer.closedrawer(gravitycompat.start);     return true; } 

for alertdialog, can set custom theme second parameter this.

alertdialog.builder dialog = new alertdialog.builder(context, r.style.customdialog); 

and in style.xml set customdialog style

<resources>     <style name="customdialog" parent="@style/theme.appcompat.light.dialog.alert">         <item name="android:background">@color/red</item>     </style> </resources> 

lastly, can set custom colour in colors.xml

<resources>     <item name="blue" type="color">#ff33b5e5</item>     <item name="purple" type="color">#ffaa66cc</item>     <item name="green" type="color">#ff99cc00</item>     <item name="orange" type="color">#ffffbb33</item>     <item name="red" type="color">#ffff4444</item>     <item name="darkblue" type="color">#ff0099cc</item>     <item name="darkpurple" type="color">#ff9933cc</item>     <item name="darkgreen" type="color">#ff669900</item>     <item name="darkorange" type="color">#ffff8800</item>     <item name="darkred" type="color">#ffcc0000</item> </resources> 

there plenty of colors choose from.

update:

try change from

public myexitdialog(activity a) {     super(a);     this.c = a; } 

to this

public myexitdialog(activity a) {     super(a, r.style.customdialog);     this.c = a; } 

cleaner code:

use constructor.

public myexitdialog(activity a, int resid) {     super(a, resid);     this.c = a; } 

and add resid inside parameter this.

myexitdialog mydialog = new myexitdialog(draweractivity.this, r.style.customdialog); mydialog.show(); 

update:

i'm sorry again giving wrong information. notice didn't use android:background. change android:windowbackground instead.

<resources>     <style name="customdialog" parent="@style/theme.appcompat.light.dialog.alert">         <item name="android:windowisfloating">false</item>         <item name="android:windowbackground">@color/red</item>     </style> </resources> 

hope helps.