@Override
    protected void onHandleIntent(Intent intent) {
        Log.d(TAG, "onHandleIntent: called");
        //validate that the received Intent contains activity recognition data
        if (mApiClient.isConnected()) {
            Log.d(TAG, "onHandleIntent: mApiClient is connected");

            if (ActivityRecognitionResult.hasResult(intent)) {
                Log.d(TAG, "onHandleIntent: ActivityRecognitionResult.hasResult");

                // extract the ActivityRecognitionResult from the Intent to see what activities your user might be performing
                ActivityRecognitionResult result = ActivityRecognitionResult.extractResult(intent);
                Log.d(TAG, "onHandleIntent: result = " + result.toString());

                // retrieve a list of the possible activities by calling getProbableActivities() on the ActivityRecognitionResult object.
...

private void initRecognitionClient() {
        mApiClient = new GoogleApiClient.Builder(this)
                .addApi(ActivityRecognition.API)
                .addConnectionCallbacks((GoogleApiClient.ConnectionCallbacks) getApplicationContext())
                .addOnConnectionFailedListener((GoogleApiClient.OnConnectionFailedListener) getApplicationContext())
                .build();

        mApiClient.connect();
        Log.d(TAG, "initRecognitionClient: called - mApiClient.builder and connect() called");
    }

  @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        super.onStartCommand(intent, flags, startId);
        initRecognitionClient();
        Log.d(TAG, "onStartCommand: called");
        startActivityRecognition();
        Log.d(TAG, "onStartCommand: startActivityRecognition() called");
        return START_STICKY;
    }

public  void startActivityRecognition(){
        Intent intent = new Intent(getApplicationContext(), ActivityRecognitionService.class);
        pendingIntent = PendingIntent.getService(getApplicationContext(), 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        ActivityRecognition.ActivityRecognitionApi.requestActivityUpdates(mApiClient, 2000, pendingIntent);
    }

java.lang.RuntimeException: An error occured while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:300)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
at java.lang.Thread.run(Thread.java:818)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.content.Context.getPackageName()' on a null object reference
at android.preference.PreferenceManager.getDefaultSharedPreferencesName(PreferenceManager.java:374)
at android.preference.PreferenceManager.getDefaultSharedPreferences(PreferenceManager.java:369)
at com.example.utility.PreferenceUtility.java.lang.Object getFromPreference(android.content.Context,java.lang.String,java.lang.Object)(PreferenceUtility.java:76)
at com.example.ui.fragments.manager.HomeDataHelper.void getBalanceFromPrefer
...