how to call an activity of a task from an activity of another task
<p>If, there is an activity task with activities  </p>

<pre><code>A1 -&gt; A2
</code></pre>

<p>and another activity task with activities  </p>

<pre><code>B1 -&gt; B2
</code></pre>

<p>The requirement is, From <code>B2</code> I need to call <code>A2</code>, but no new instance of <code>A2</code> must be created, it should be loaded from the <code>stack</code> (<code>A2</code> which is in top of the first task)<br>
Now when I press <code>back button</code> from <code>A2</code> I need to get <code>A1</code>?<br>
How to implement this?</p>
