Collapsing Toolbar with NavigationDrawer toggle button not showing
<p>so im building android application in my main activity im using collapse toolbar with navigation drawer but the tuggle button for the navigationDrawer not showing.
so i need a  way to make the toggle appear specially when toolbar fully collapsed</p>

<p>this is my content_main:</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"

    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.infinity.dev.nearby.Main2Activity"
    tools:showIn="@layout/app_bar_main2"
    android:background="@color/grey"
    android:fillViewport="false"&gt;
    &lt;android.support.design.widget.AppBarLayout
        android:id="@+id/MyAppbar"
        android:layout_width="match_parent"
        android:layout_height="256dp"
        android:fitsSystemWindows="true"&gt;
    &lt;android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/collapse_toolbar"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_scrollFlags="scroll|exitUntilCollapsed"
        app:contentScrim="@color/colorPrimary"
        android:fitsSystemWindows="true"&gt;

    &lt;ImageView
        android:id="@+id/bgheader"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="centerCrop"
        android:background="@drawable/france"
        android:fitsSystemWindows="true"
        app:layout_collapseMode="pin" /&gt;

        &lt;android.support.v7.widget.Toolbar
            android:id="@+id/MyToolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            style="@style/AppTheme"

            app:layout_collapseMode="parallax" /&gt;



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


    &lt;/android.support.design.widget.AppBarLayout&gt;
&lt;android.support.v4.widget.NestedScrollView...&gt;

&lt;/android.support.design.widget.CoordinatorLayout&gt;
</code></pre>

<p>and this is the activity_main.xml:</p>

<pre><code> &lt;?xml version="1.0" encoding="utf-8"?&gt;
    &lt;android.support.v4.widget.DrawerLayout 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:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        tools:openDrawer="start"&gt;

        &lt;include
            layout="@layout/app_bar_main2"
            android:layout_width="match_parent"
            android:layout_height="match_parent" /&gt;



        &lt;android.support.design.widget.NavigationView
            android:id="@+id/nav_view"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            android:fitsSystemWindows="true"
            app:headerLayout="@layout/nav_header_main2"
            app:menu="@menu/activity_main2_drawer"
            app:itemTextColor="#212121"
            /&gt;

    &lt;/android.support.v4.widget.DrawerLayout&gt;
</code></pre>

<p>this is the app_bar_main.xml:</p>

<p>
</p>

<pre><code>&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.design.widget.AppBarLayout&gt;

&lt;include layout="@layout/content_main2" /&gt;
</code></pre>

<p></p>

<p>this is the code used in main_activity.java:</p>

<pre><code>final Toolbar toolbar = (Toolbar) findViewById(R.id.MyToolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
CollapsingToolbarLayout collapsingToolbarLayout =  (CollapsingToolbarLayout)findViewById(R.id.collapse_toolbar);
collapsingToolbarLayout.setTitle("My Country");
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();

NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);                    

collapsingToolbarLayout.setContentScrimColor(ContextCompat.getColor(context,R.color.colorPrimary));
</code></pre>

<p><a href="http://i.stack.imgur.com/qDO2K.jpg" rel="nofollow">image of toolbar before collapse:</a></p>

<p><a href="http://i.stack.imgur.com/7quKu.jpg" rel="nofollow">image of toolbar after Collapse</a></p>