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POHow to start long running background task in android service
 

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  1. POHow to start long running background task in android service
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    <p>Having read most of the available documentation on Android services on the developer site and here in stackoverflow, I'm still confused by several aspects of running a service in a separate task. Hopefully someone can put me on the right track.</p> <p>Let's say we have trival service framework such as</p> <pre><code>public class HliService extends Service { @Override public void onCreate() { } @Override public int onStartCommand(Intent intent, int flags, int startId) { // If we get killed, after returning from here, restart return START_STICKY; } @Override public IBinder onBind(Intent intent) { // We don't provide binding, so return null return null; } @Override public void onDestroy() { } } </code></pre> <p>and in the manifest, I have </p> <pre><code>&lt;service android:name=".HliService" android:process=":HLI_Comms"/&gt; </code></pre> <p>so that the service runs in its own thread.</p> <p>The intent of the service is to provide a background task that will communicate to a device using a TCP socket and do some other stuff. At the risk of ignoring battery issues etc, basically I'd like it to run forever.</p> <p>Something like</p> <pre><code>// Method that communicates using a TCP socket, and needs to send // information back to the activity and receive messages from activity // not shown here. private void dummytask() { boolean keepGoing = true; while (keepGoing) { // do useful stuff in here // sets keepGoing false at some point } stopSelf(); } </code></pre> <p>What is the best way to initiate this method/task ?</p> <p>I have looked at code in the developer site that uses a message handler and a looper, which I only partly understand, but it seems very complicated and perhaps more than I require?</p> <p>I don't believe I can call this method from either <code>onCreate()</code> or <code>onStartCommand()</code> since then neither would complete when invoked from the system ? Should I start it with a timer or alarm?</p> <p>I will need to add a message handler to communicate with the the gui activity, but since I'm starting the service in another thread (by virtue of the manifest "process" instruction), do I need to use AIDL instead?</p> <p>I have also looked at using AysnchTask rather than extending Service, but it seems better suited to running a task and then terminating.</p>
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    1. CO`while (keepGoing)` - if this is in another thread than the one that sets `keepGoing` to false `keepGoing` MUST BE `volatile` - read on the Java memory model
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    2. COPlease see this answer this may help you. [enter link description here][1] [1]: http://stackoverflow.com/a/13783477/2165080
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      1. USAshekur Rahman Molla Asik
 

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