title: Error thrown on changing the alpha property
body: <p>I get this error for setting the alpha property to a view</p>
  
  <pre><code>java.lang.NoSuchMethodError: android.view.View.setAlpha
  </code></pre>
  
  <p>in my code</p>
  
  <pre><code>((View) findViewById(R.id.view)).setAlpha(100);
  
  //with float value also doesn't works
  </code></pre>
  
  <p>What might be the problem ? I do not have any compile errors just on runtime</p>