title: Android Animation on focused button (state_focused)
body: <p>For example i have few buttons, and one ImageView.
  I using keyboard to control the Android, 
  For focused or pressed button i use different state image.</p>
  
  <pre><code> &lt;selector xmlns:android="http://schemas.android.com/apk/res/android"&gt;
      &lt;item android:state_pressed="true" android:drawable="@drawable/newbtfocus" /&gt;
      &lt;item android:state_focused="true" android:drawable="@drawable/pressednewbt" /&gt;
      &lt;item android:state_focused="false" android:state_pressed="false" android:state_enabled="true" android:drawable="@android:color/transparent" /&gt;
      &lt;item android:state_enabled="false" android:drawable="@color/colorAccent" /&gt;
  &lt;/selector&gt;
  </code></pre>
  
  <p>Now i need to change the imageview on focused button. 
  For example:</p>
  
  <ul>
  <li>Then focused button 1 the imageview show Fredy Mercury. </li>
  <li>Then focused    button 2 the imageview show Jackson.</li>
  <li>Then focused button 3 the    imageview show AC DC</li>
  </ul>
  
  <p>and other.</p>
  
  <p>Thank's a lot for any help.</p>