title: is there a default back key(on device) listener in android?
body: <p>I am having two activities A and B. when i click the button in A that will shows B. when i click the Button in B it backs to A. i had set the overridePendingTransition method after the finish() method. it works properly. but in case the current Activity is B. on that time i click the default back button in the device. it shows the right to left transition to show the Activity A.</p>
  
  <p>How i can listen that Default back key on device?</p>
  
  <p><strong>EDIT:</strong></p>
  
  <pre><code>Log.v(TAG, "back pressed");
  finish();
  overridePendingTransition(R.anim.slide_top_to_bottom, R.anim.hold);
  </code></pre>