title: Android - Change only the alpha TextView's text
body: <p>Say I have this code:</p>
  
  <pre><code>int color = tv.getCurrentTextColor();
  </code></pre>
  
  <p>How would I change only the Alpha on this color?</p>
  
  <p>For Example:</p>
  
  <p>if color is <code>0x00ffffff</code>, how would I change it to <code>0xffffffff</code> ?</p>
  
  <p>Is there a method for that or I need to do some hex/int manipulations?</p>