Update Interval for Location Service Android

Question

I am writing a Location Service, with a update Interval to send the Location updates to the server. But I trying to update this interval variable in the service via user input(AlertDialog). It works perfectly fine when hard coded.

I am using this code to get the interval variable from the AlertDialog class, in the onCreate() of the service.

public void onCreate() {
    super.onCreate();


    final boolean tr=true;
      new Thread(new Runnable() {
              public void run() {

                while (tr) {

                    //check your static variable here
                    updateInterval=ShowCurInterval.loadCurInterval(getApplicationContext());//ShowCur Interval is the Alert Dialog calss
                    Log.d(" INTERVAL ","Interval "+ updateInterval);
                  try {
                    Thread.sleep(10000);
                  } catch (InterruptedException e) {
                    e.printStackTrace();
                  }

                }
              }}
               ).start();

      startLocationListener(updateInterval);
}

And I can also see the new updateInterval value in Log ( which is added from the Alert Dialog). But requestLocationUpdates() still uses the pre defined updateInterval value.

Here is the startLocationListener() method:

public void startLocationListener(int updateInterval) {
    LocationManager locManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    locManager.removeUpdates(locListener);
    locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, updateInterval, updateDistance, locListener);
    Log.d(getClass().getSimpleName(), "Loclistener started, Updatetime: " + updateInterval);
    Toast.makeText(getApplicationContext(), "UPDATE INTERVAL"+updateInterval,Toast.LENGTH_SHORT );
    preInterval = updateInterval;
}

Does anyone have any suggestions how can I update this variable?

@binW Edited part with exception:

    Handler mhandler = new Handler ();
       mhandler.postDelayed( new Runnable(){

          public void run(){
              Looper.prepare();

              updateInterval=SingletonManager.getInstance().loadCurInterval(getApplicationContext());
              SingletonManager.getInstance().saveCurInterval(getApplicationContext(), updateInterval);
              startLocationListener(updateInterval); 
              Log.d(" INTERVAL ","Interval "+ updateInterval);
              //startChecking();


          }
       }, 2000); 

Exception:

04-17 03:18:55.250: E/AndroidRuntime(2146): java.lang.RuntimeException: Only one Looper may be created per thread

Thank You in advance.

Answer 1

you are calling startLocationListener() in onCreate() and not in the thread that you created for getting the new value of updateInterval. But the call to startLocationListener(updateInterval); gets executed before the new thread executes and hence you get the old value of updateInterval. I believe you should change your code to following:

public Handler handler;
public void onCreate() {
    super.onCreate();

    handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            startLocationListener(updateInterval);
        }
    };

    final boolean tr=true;
      new Thread(new Runnable() {
         public void run() {
             while (tr) {
                //check your static variable here
                updateInterval=ShowCurInterval.loadCurInterval(getApplicationContext());//ShowCur Interval is the Alert Dialog calss
                handler.sendEmptyMessage(1);
                Log.d(" INTERVAL ","Interval "+ updateInterval);
                try {
                    Thread.sleep(10000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }

                }
              }}
        ).start();
}