title: Android : Call activity of another application
body: <p>I have two Android applications,suppose they are "A" and "B", "A" has five activities and I want to call its specific activity from button click event of "B".
  I tested this way of calling one application from another: </p>
  
  <pre><code>Intent LaunchIntent = getPackageManager().getLaunchIntentForPackage("com.testapp.ws");
  startActivity(LaunchIntent);
  </code></pre>
  
  <p>"com.testapp.ws" is the package name of "A".</p>
  
  <p>This runs "A" from its first activity again not from the specific activity.
  How can I call A's specified activity? </p>