How to set background transparent on toolbar in android -


i want set background of toolbar transparent.

<?xml version="1.0" encoding="utf-8"?> <android.support.v7.widget.toolbar xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:background="@android:color/transparent"     android:theme="@style/themeoverlay.appcompat.dark"     android:elevation="4dp"     android:id="@+id/tool_bar_org"     android:paddingtop="0dp">  </android.support.v7.widget.toolbar>

here toolbar layout background not being transparent

just show in white color 

 toolbar = (toolbar) findviewbyid(r.id.tool_bar_org);  toolbar.getbackgroud().setalpha(0);  setsupportactionbar(toolbar);

its not working. can please tell me how make transparent.

this theme have used in project make appcompact actionbar transparent, modify according needs: 

<style name="adhoctheme" parent="theme.appcompat.light.darkactionbar">         <item name="android:actionbarstyle">@style/adhocblack</item>         <item name="actionbarstyle">@style/adhocblack</item>         <item name="android:windowactionbaroverlay">true</item>         <item name="windowactionbaroverlay">true</item>     </style>      <style name="adhocblack" parent="@style/widget.appcompat.light.actionbar.solid.inverse">         <item name="android:background">#0d000000</item>         <item name="background">@color/appcompact_transparent_actionbar_bg</item>         <item name="android:icon">@drawable/logo_header_2</item>     </style>

where appcompact_transparent_actionbar_bg = #0d000000

important:

have here check how different values folders contain specific style files render on various api's


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