Memory leak

gistfile1.txt

public class MyService extends Service implements OnSharedPreferenceChangeListener {

    private Looper mServiceLooper;
    private ServiceHandler mServiceHandler;

    @Override
    public void onCreate() {

        // Start up the thread running the service.  Note that we create a
        // separate thread because the service normally runs in the process's
        // main thread, which we don't want to block.  We also make it
        // background priority so CPU-intensive work will not disrupt our UI.
        HandlerThread thread = new HandlerThread("ServiceStartArguments", Process.THREAD_PRIORITY_BACKGROUND);
        thread.start();

        mServiceLooper = thread.getLooper();
        mServiceHandler = new ServiceHandler(mServiceLooper);
    }
    
    public final class ServiceHandler extends Handler {
        public ServiceHandler(Looper looper) {
            super(looper);
        }
        
        @Override
        public void handleMessage(Message msg) {
            // do stuff
        }

    }
}

Fixed
public class MyService extends Service implements OnSharedPreferenceChangeListener {

    private Looper mServiceLooper;
    private ServiceHandler mServiceHandler;

    @Override
    public void onCreate() {

        // Start up the thread running the service.  Note that we create a
        // separate thread because the service normally runs in the process's
        // main thread, which we don't want to block.  We also make it
        // background priority so CPU-intensive work will not disrupt our UI.
        HandlerThread thread = new HandlerThread("ServiceStartArguments", Process.THREAD_PRIORITY_BACKGROUND);
        thread.start();

        mServiceLooper = thread.getLooper();
        mServiceHandler = new ServiceHandler(mServiceLooper);
    }

    public static class ServiceHandler extends Handler {
       WeakReference<MyService> mServiceReference;
        public ServiceHandler(Looper looper, MyService myService) {
            super(looper);
            mServiceReference = new WeakReference(myService)<>;
        }

        @Override
        public void handleMessage(Message msg) {
            // do stuff
        }

    }
}