Multiple UI Threads with one Working Thread
<p>I have an app with following Diagram:</p>

<p>Start Screen -> Control Screen &lt;-> Settings Screen &lt;-> Message Screen</p>

<p>The Working-Thread that always have to run is a HTTP Request which gathers Information constantly so it is started at Start Screen.</p>

<p>The Start Screen jumps into Control Screen. </p>

<p>The Information gathered in Working-Thread have to be passed to the Message Screen and being displayed all, even if I change to Settings or Control Screen. Is this made by running 2 UI Threads simultaneausly to update the Message Screen in the background?
(I first throught about What's app where the Messages are constantly displayed)</p>