title: navigation drawer header is over the content?
body: <p>I'm trying to add a header in my navigation drawer.
  I'm a beginner on android studio, so any tips would help me a lot</p>
  
  <p>The problem is this header is over my navigation drawer itens, so I can't see some of my navigation drawer itens.</p>
  
  <p>how can I add this header properly? also, my textview content is not showing, why?</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"
      tools:context="com.sk.mf.UserAreaActivity"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:background="#fff"
      android:id="@+id/drawerLayout"&gt;
  
  
      &lt;FrameLayout
          android:layout_height="wrap_content" android:layout_width="wrap_content"
          android:id="@+id/content_frame"&gt;
      &lt;/FrameLayout&gt;
  
  
      &lt;android.support.design.widget.NavigationView
          android:id="@+id/navigation"
          android:layout_width="wrap_content"
          android:layout_height="match_parent"
          app:menu="@layout/navigation_menu"
          android:layout_gravity="start"&gt;
  
  
  
          &lt;RelativeLayout
              android:orientation="vertical" android:layout_width="match_parent"
              android:layout_height="100dp"
              android:background="@color/colorPrimary"&gt;
  
              &lt;TextView
                  android:text="TextView"
                  android:layout_width="wrap_content"
                  android:layout_height="wrap_content"
                  android:layout_centerVertical="true"
                  android:layout_centerHorizontal="true"
                  android:id="@+id/nh_User"
                  android:textSize="24sp"
                  android:textColor="#ffffff" /&gt;
  
          &lt;/RelativeLayout&gt;
  
  
  
  
  
  
      &lt;/android.support.design.widget.NavigationView&gt;
  
  
  
  &lt;/android.support.v4.widget.DrawerLayout&gt;
  </code></pre>