title: how to remove left margin of Android Toolbar?
body: <p>I'm trying to use toolbar for my project.
  Here is the code I am using:</p>
  
  <pre><code>&lt;android.support.v7.widget.Toolbar
      android:id="@+id/toolbar"
      android:layout_width="match_parent"
      android:layout_height="?attr/actionBarSize"
      android:layout_alignParentTop="true"
      android:background="?attr/colorPrimary"
      android:contentInsetLeft="0dp"
      android:elevation="@dimen/margin_padding_8dp"
      android:contentInsetStart="0dp"&gt;
  
      &lt;RelativeLayout
          android:id="@+id/rlToolbar"
          android:layout_width="match_parent"
          android:layout_height="match_parent"&gt;
  
          &lt;TextView
              android:id="@+id/tvTitle"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_centerInParent="true"
              android:paddingRight="@dimen/margin_padding_16dp"
              android:text="AppBar"
              android:textAppearance="@style/TextAppearance.AppCompat"
              android:textColor="@color/white"
              android:textSize="@dimen/text_size_20sp" /&gt;
  
      &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>
  <br>
  <img src="https://i.imgur.com/d5PX5bZ.png" alt="toolbar">
  <br>
  <br>
  I want to remove left margin, Here I set <strong>android:contentInsetLeft="0dp"</strong> and <strong>android:contentInsetStart="0dp"</strong> but it's <strong>not</strong> working..Please help me !</p>