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POAndroid app crashing (looper = null)
 

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  1. POAndroid app crashing (looper = null)
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    <p>I have a problem with my app. My application is actually a service. I have Main extends Service, it has private Looper looper variable to get HandlerThread looper. In <code>onCreate</code> function I initialize location manager, location listener and HandlerThread (which sets its looper to looper variable), then I try to use <code>requestLocationUpdates</code> passing the looper variable as looper. I gets an error</p> <pre><code>09-22 17:30:24.069: E/AndroidRuntime(1414): Caused by: java.lang.IllegalArgumentException: looper==null </code></pre> <p>Should I do anything else to this HandlerThread? Maybe start it?:></p> <p>I don't paste any code since it's quite long and I don't know the relevant part which would be appropriate to solve the problem. Therefore I'd love to pass any code You may need (HandlerThread? Anything else?)</p> <p>Thanks for any help.</p> <p><em><strong></em>**</strong> EDIT <strong><em>*</em>*</strong></p> <p>Alright, onCreate function:</p> <pre><code>public void onCreate() { super.onCreate(); Log.d("Service", "Service onCreate starts"); running = true; lt = new LooperThread("GPSIntentLT"); serviceLocationM = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE); serviceLocationL = new MyLocationListener(); requestUpdates(serviceLocationL); Log.d("Service", "Service onCreate ends"); } </code></pre> <p>requestUpdates function (called above, there the error appears):</p> <pre><code>private void requestUpdates(LocationListener listener) { Log.d("Service", "requestUpdates starts"); serviceLocationM.removeUpdates(listener); flag = displayGpsStatus(); switch(flag) { case 0: Log.d("Service", "No Location Provider"); break; case 1: Log.d("Service", "Network Provider"); serviceLocationM.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 10, 25, listener, theLooper); break; case 2: Log.d("Service", "GPS Provider"); serviceLocationM.requestLocationUpdates(LocationManager.GPS_PROVIDER, 10, 25, listener, theLooper); break; } Log.d("Service", "requestUpdates ends"); } </code></pre> <p>And HandlerThread:</p> <pre><code>private class LooperThread extends HandlerThread{ public LooperThread(String name) { super(name); Log.d("Service", "LooperThread constructor starts"); theLooper = getLooper(); Log.d("Service", "LooperThread constructor ends"); } @Override public void run() { super.run(); Log.d("Service", "LooperThread run called"); } } </code></pre> <p>And at the end, logcat for this app:</p> <pre><code>09-22 18:21:47.997: D/Service(386): Service onCreate starts 09-22 18:21:47.997: D/Service(386): LooperThread constructor starts 09-22 18:21:48.007: D/Service(386): LooperThread constructor ends </code></pre> <p>So it does go down on requestLocationUpdates function, it happens on 2.2 emulator, on 2.3.3 it crashes the whole emulator by killing its processes (?).</p>
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    1. COYou should at least post what code you can of the classes, onCreate, and the handler thread.
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    2. CO@Jems added the code.
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    3. COWhy are you extending a HandlerThread?
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