title: TextView on different displays
body: <p><br>
  Help to understand please.
  I need to show up in a specific box.
  I do it like this:</p>
  
  <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:tools="http://schemas.android.com/tools"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:background="@drawable/fon"
      tools:context=".MainActivity" &gt;
  
  ....
  
  &lt;TextView
          android:id="@+id/textView3"
          android:layout_width="200dp"
          android:layout_height="210dp"
          android:layout_centerHorizontal="true"
          android:layout_centerVertical="true"
          android:includeFontPadding="false"
          android:lineSpacingMultiplier="0.8"
          android:textAlignment="center"
          android:textColor="@color/black"
          android:textSize="20sp" /&gt;
  
  ....
   &lt;/RelativeLayout&gt;
  </code></pre>
  
  <p>Everything works at four inch screen well but if  take a big diagonal, it will be bad. <br>At increase in the screen the textView size doesn't change.<br>
  I use "dp" and "sp", instead of static "px", but does not work...
  Why Is this happening ?</p>
  
  <p>screenshots:</p>
  
  <p><a href="http://i.stack.imgur.com/HcDQM.jpg" rel="nofollow">4 inch</a></p>
  
  <p><a href="http://i.stack.imgur.com/tQhUU.jpg" rel="nofollow">5.4 inch</a></p>