title: Set fragments' positions in android activities
body: <p>I have a fragment that should be shown in an activity under another fragment </p>
  
  <p>In the xml of the fragment I tried to use:</p>
  
  <pre><code>&lt;RelativeLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/second_fragment"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_marginBottom="10sp"
      android:layout_below="@id/first_fragment"&gt;  
      &lt;TextView 
          android:id="@+id/mytext"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text=" "
          android:focusable="false"
          android:clickable="false"
          android:textSize="20sp"
          android:padding="5sp"
          android:layout_centerHorizontal="true"/&gt;    
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>(please note android:layout_below="@id/first_fragment" in the layout tag)</p>
  
  <p>I have also tried this:</p>
  
  <pre><code>&lt;RelativeLayout
      xmlns:android="http://schemas.android.com/apk/res/android"
      android:id="@+id/first_fragment"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_marginBottom="10sp"&gt;     
      &lt;TextView 
          android:id="@+id/mytext"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:text=" "
          android:focusable="false"
          android:clickable="false"
          android:textSize="20sp"
          android:padding="5sp"
          android:layout_centerHorizontal="true"
          android:layout_below="@id/first_fragment"/&gt;     
  &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>(please note android:layout_below="@id/first_fragment" in the TextView tag)</p>
  
  <p>in both cases the application compile and run but the second fragment is shown on the top of the screen instead of after the first one.</p>
  
  <p>Please consider that I'm adding the fragments programmatically by using FragmentTransaction and I add the second fragment after having added the first one, but in the same transaction</p>
  
  <p>Can you please tell me what's wrong?</p>
  
  <p>Thank-you</p>