title: TextView changes size when i use setText()
body: <p>I have 2 questions:</p>
  
  <p>1) 
  I have several TextView created this way</p>
  
  <pre><code>&lt;TextView
      android:id="@+id/listaNumeriTextView"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:layout_centerHorizontal="true"
      android:layout_centerVertical="true"
      android:background="#CCCCCC"
      android:gravity="center"/&gt;
  </code></pre>
  
  <p>When I call setText(), the size of the TextView changes according to the lenght of my text. I tried to call invalidate() but i still have the same problem. How can i solve it?</p>
  
  <p>2) i thought i can set the width of my TextView according to the screen size. For example, if i have 2 TextView on the same line, I can do this textViewSize =  screenSize/2.
  Is this a correct way to set Views width?</p>