Actionbar/toolbar background color is not changing at all xml
<h2>hello i have project that use multiple activity and xml one of this xml is navigation drawer it's easy to change backgournd color of actionbar/toolbar but when i change it on the other layout/xml background actionbar/tooolbar not change how to change all of them it's</h2>

<p>Screenshot
<a href="http://i.stack.imgur.com/rXVCr.png" rel="nofollow">screenshot</a></p>

<p>on this change </p>

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="ir.diamonddesign.tajrobi96.MainActivity"&gt;

    &lt;android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay"&gt;

        &lt;android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="@android:color/holo_red_dark"
            app:popupTheme="@style/AppTheme.PopupOverlay"

            /&gt;

    &lt;/android.support.design.widget.AppBarLayout&gt;

    &lt;include layout="@layout/content_main" /&gt;
&lt;/android.support.design.widget.CoordinatorLayout&gt;
</code></pre>

<p>on this not change</p>

<pre><code>/*
    &lt;?xml version="1.0" encoding="utf-8"?&gt;

&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="ir.diamonddesign.tajrobi96.Questionsactivity"
    &gt;


    &lt;TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="15dp"
        android:textAppe``arance="?android:attr/textAppearanceLarge"
        android:text="@string/kharej_text"
        android:id="@+id/textView2"
        android:textDirection="rtl"
        android:layout_alignTop="@+id/textView3"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" /&gt;

    &lt;TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="@string/dakhel_text"
        android:textSize="15dp"
        android:id="@+id/textView3"
        android:layout_alignParentTop="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:layout_alignParentBottom="false"
        android:textDirection="rtl" /&gt;

&lt;/RelativeLayout&gt;*/
</code></pre>