title: How to set an icon at the end of Toolbar
body: <p>I want to set an icon at the the end of my <code>Toolbar</code>,which start another activity.
  My <code>Toolbar</code> portion </p>
  
  <pre><code> &lt;android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
                  xmlns:app="http://schemas.android.com/apk/res-auto"
                  android:id="@+id/toolbar"
                  android:layout_width="match_parent"
                  android:layout_height="@dimen/abc_action_bar_default_height_material"
                  android:background="#2B4AE0"
                  app:theme="@style/ToolBarStyle"&gt;
  
                  &lt;TextView
                      android:id="@+id/headerText"
                      android:layout_width="wrap_content"
                      android:layout_height="wrap_content"
                      android:textAppearance="@android:style/TextAppearance.Theme"
                      android:textColor="@android:color/white" /&gt;
  
                  &lt;RelativeLayout
                      android:id="@+id/notification"
                      android:layout_width="50dp"
                      android:layout_height="match_parent"
                      android:clickable="true"
                      android:gravity="center" /&gt;
  
                      &lt;ImageView
                          android:layout_width="25dp"
                          android:layout_height="25dp"
  
                          android:layout_centerHorizontal="true"
                          android:layout_centerVertical="true"
                          android:src="@drawable/bell_icon" /&gt;
                  &lt;/RelativeLayout&gt;
              &lt;/android.support.v7.widget.Toolbar&gt;
  </code></pre>
  
  <p>I tried  </p>
  
  <pre><code>android:layout_alignParentEnd="true"
  </code></pre>
  
  <p>and setting margin left but it doesn't work correctly.</p>