Gauss Jordan
Lurker
Hey Android devs!
I have quite the frustrating bug in my app. The setup is a graphical client and a Service polling for GPS coordinates and messages from the activity if it is bound.
After a random long time the app shuts down with an uncaught exception and I get the following messages in LogCat:
The NullPointerException should not be connected with this problem as it happens when the service tries to restart (and LibGdx is not initiated i assume, derp derp. Just another dumb thing I'm doing).
This is the code in the service's onCreate. I trimmed down some part so it's more readable
Could this problem be caused by the Android system force shutting down the service? I have never been on the limit using up the phone's memory, but it seems as though it's often happening when i start up another application.
Help me out here. I'm a skilled programmer, but I have limited Java and Android knowledge. How can I better debug this? Where could the problem occur?
Let me know if you need to see more of the code to tell what could be the problem.
I have quite the frustrating bug in my app. The setup is a graphical client and a Service polling for GPS coordinates and messages from the activity if it is bound.
After a random long time the app shuts down with an uncaught exception and I get the following messages in LogCat:
Code:
04-28 01:05:48.925: I/GLThread(8596): releasing EGL context because paused tid=10
04-28 01:05:48.995: I/GLThread(8596): noticed surfaceView surface lost tid=10
04-28 01:05:49.010: I/GLThread(8596): exiting tid=10
04-28 01:05:49.085: W/IInputConnectionWrapper(8596): showStatusIcon on inactive InputConnection
04-28 01:36:14.365: D/dalvikvm(8596): GC_EXPLICIT freed 1963K, 50% free 4471K/8903K, external 33K/544K, paused 132ms
04-28 01:37:50.455: D/dalvikvm(9091): GC_EXTERNAL_ALLOC freed 54K, 49% free 2746K/5379K, external 0K/0K, paused 21ms
04-28 01:37:50.475: D/AndroidRuntime(9091): Shutting down VM
04-28 01:37:50.475: W/dalvikvm(9091): threadid=1: thread exiting with uncaught exception (group=0x4001e578)
04-28 01:37:50.480: E/AndroidRuntime(9091): FATAL EXCEPTION: main
04-28 01:37:50.480: E/AndroidRuntime(9091): java.lang.RuntimeException: Unable to create service se.bitheroes.rg.GPS_Service: java.lang.NullPointerException
04-28 01:37:50.480: E/AndroidRuntime(9091): at android.app.ActivityThread.handleCreateService(ActivityThread.java:1959)
04-28 01:37:50.480: E/AndroidRuntime(9091): at android.app.ActivityThread.access$2500(ActivityThread.java:117)
04-28 01:37:50.480: E/AndroidRuntime(9091): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:989)
04-28 01:37:50.480: E/AndroidRuntime(9091): at android.os.Handler.dispatchMessage(Handler.java:99)
04-28 01:37:50.480: E/AndroidRuntime(9091): at android.os.Looper.loop(Looper.java:130)
04-28 01:37:50.480: E/AndroidRuntime(9091): at android.app.ActivityThread.main(ActivityThread.java:3691)
04-28 01:37:50.480: E/AndroidRuntime(9091): at java.lang.reflect.Method.invokeNative(Native Method)
04-28 01:37:50.480: E/AndroidRuntime(9091): at java.lang.reflect.Method.invoke(Method.java:507)
04-28 01:37:50.480: E/AndroidRuntime(9091): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:907)
04-28 01:37:50.480: E/AndroidRuntime(9091): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)
04-28 01:37:50.480: E/AndroidRuntime(9091): at dalvik.system.NativeStart.main(Native Method)
04-28 01:37:50.480: E/AndroidRuntime(9091): Caused by: java.lang.NullPointerException
04-28 01:37:50.480: E/AndroidRuntime(9091): at se.bitheroes.rg.eventSystem.EventHandler.LoadTriggers(EventHandler.java:93)
04-28 01:37:50.480: E/AndroidRuntime(9091): at se.bitheroes.rg.eventSystem.EventHandler.<init>(EventHandler.java:45)
04-28 01:37:50.480: E/AndroidRuntime(9091): at se.bitheroes.rg.GPS_Service.onCreate(GPS_Service.java:523)
04-28 01:37:50.480: E/AndroidRuntime(9091): at android.app.ActivityThread.handleCreateService(ActivityThread.java:1949)
04-28 01:37:50.480: E/AndroidRuntime(9091): ... 10 more
04-28 01:37:50.490: I/Process(9091): Sending signal. PID: 9091 SIG: 9This is the code in the service's onCreate. I trimmed down some part so it's more readable
Code:
@Override
public void onCreate()
{
super.onCreate();
Toast.makeText( getApplicationContext(), "GPS_Service created", Toast.LENGTH_SHORT).show();
locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
locationListener = new MyLocationListener();
locationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 1000, 0, locationListener);
ServiceGlobals.eventHandler = new EventHandler(getExternalFilesDir(null).getAbsolutePath() + "/ServiceTriggers", true);
ServiceLocationHandler.Init();
ServiceChunkUpdate.Init();
messageHandler = new MessageHandler();
GPSCordinates = new ArrayBlockingQueue<GPSCoordinate>(256);
//Start the map generating thread
thread = new Thread() {
public void run(){
try {
InitWorld();
initialized = true;
if(Statics.usingFakeCordinates)
{
latestOkLocation = new GPSCoordinate();
latestOkLocation.lat = 0;
latestOkLocation.lon = 0;
latestOkLocation.gameLat = 0;
latestOkLocation.gameLon = 0;
}
if(messageHandler.CanMessageOut())
{
Message msg = Message.obtain(null,MessageHandler.OUT_MSG_SERVICE_INITIALIZED);
messageHandler.SendMessage(msg);
}
while(!killThread){
//System.out.format("Thread loop \n");
if(ProcessGPSCordinates())
{
System.out.format("Processing coordinate \n");
ServiceMapHandler.Update(latestOkLocation.getGameX() , latestOkLocation.getGameY());
---------------------
messageHandler.SendMessage(outMsg);
}
//Check messages from the activity
for(ServceMessage msg = messageHandler.GetNextMessage(); msg != null; msg = messageHandler.GetNextMessage())
{
System.out.format("Activity message \n");
switch(msg.GetType())
{
-----------------
}
}
for(Action action = ServiceGlobals.eventHandler.GetNextAction(); action != null; action = ServiceGlobals.eventHandler.GetNextAction())
{
System.out.format("Event message \n");
switch(action.GetType())
{
---------------------------
}
}
if (ServiceChunkUpdate.UpdatedTiles() > 0) {
if (!ServiceChunkUpdate.IsFull()) {
Message outMsg = GenerateChunkUpdateMessage();
messageHandler.SendMessage(outMsg);
}
else {
for (int i = 0; i < ServiceChunkUpdate.chunkIndex; i++) {
ServiceMapChunk chunk = ServiceChunkUpdate.chunks[i];
short data[] = null;
if (chunk != null)
data = chunk.SerializeToActivityArray();
if (data != null)
messageHandler.SendMessage(GenerateChunkDataMessage(data, chunk.chunkPos.x, chunk.chunkPos.y));
}
}
}
if (ServiceChunkUpdate.updatedPaths.size() > 0) {
Message outMsg2 = GeneratePathUpdateMessage(ServiceChunkUpdate.updatedPaths);
messageHandler.SendMessage(outMsg2);
}
ServiceChunkUpdate.Flush();
try {
Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
threadKilled = true;
} catch (Exception e) {
e.printStackTrace();
}
}
};
thread.start();
}Could this problem be caused by the Android system force shutting down the service? I have never been on the limit using up the phone's memory, but it seems as though it's often happening when i start up another application.
Help me out here. I'm a skilled programmer, but I have limited Java and Android knowledge. How can I better debug this? Where could the problem occur?
Let me know if you need to see more of the code to tell what could be the problem.