title: InjectView in an Activity read as a parameter
body: <p>I've a helper class with one function, that receives an activity as a parameter.
  I want to inject a view from that activity. Is this possible?</p>
  
  <pre><code>public class myClass {
     public void myMethod(final Activity activity) {
        // Use here a TextView from that activity - how to inject it?
  </code></pre>
  
  <p>Thanks in advance!</p>