I'm having a problem with notifications coming from/sending to fragments. I'll try to explain my scenario as clear as possible to show to issue.
I have an activity, MyWorkout.java, this activity has an expandable list view. All items on expandable list view send the user to the second activity, WorkoutDaysActivity. They all send a seperate extra intent, so I know which item the user clicked. In WorkoutDaysActivity.java, 3 fragments are created, Monday, Wednesday, and Friday. I have separate classes for each activity. These classes have a recycler view and a timer. I have it so when the timer finishes, the user gets a notification. This works, but when I try to send the user to WorkoutDaysActivity from the notification, it crashes with the below error.
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.hashCode()' on a null object reference
at com.bestworkouts.sheikoworkout.WorkoutDaysActivity.addPages(WorkoutDaysActivity.java:45)
at com.bestworkouts.sheikoworkout.WorkoutDaysActivity.onCreate(WorkoutDaysActivity.java:29)
The line that it sends me too is where it tries to set the title(switch statement below) based on the intent passed from MyWorkout.java. I'm guessing that is because the intent is not passed as they getting to this class from the notification rather then from MyWorkout.java, therefore the string title is null. My problem is I have no idea how to fix this. The notification works fine if I send it to MyWorkout.java, but I'd prefer to send it back to where the timer is set if possible.
public class WorkoutDaysActivity extends BaseActivity{
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.workout_days);
mToolBar = activateToolbar();
setUpNavigationDrawer();
ViewPager vp = (ViewPager) findViewById(R.id.view_pager);
this.addPages(vp);
TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
tabLayout.setupWithViewPager(vp);
tabLayout.setOnTabSelectedListener(listener(vp));
}
//ADD ALL PAGES
private void addPages(ViewPager pager) {
MyFragPagerAdapter adapter = new MyFragPagerAdapter(getSupportFragmentManager());
Intent intent = getIntent();
String workout = intent.getStringExtra("workout");
Bundle args = new Bundle();
args.putString("workout", workout);
String title = args.getString("workout");
switch(title) {
case "w29w1" : {
getSupportActionBar().setTitle("Workout 29 Week 1");
break;
}
case "w29w2" : {
getSupportActionBar().setTitle("Workout 29 Week 2");
break;
}
MondayFragment mondayFragment = new MondayFragment();
mondayFragment.setArguments(args);
adapter.addPage(mondayFragment);
WedFragment wedFragment = new WedFragment();
wedFragment.setArguments(args);
adapter.addPage(wedFragment);
FridayFragment fridayFragment = new FridayFragment();
fridayFragment.setArguments(args);
adapter.addPage(fridayFragment);
pager.setAdapter(adapter);
}
This is where the timer is (MondayFragment.java):
private Button btnStart;
private Button btnStop;
private Button btnReset;
private CountDownTimer mCountDownTimer;
private TextView txtViewRest;
private void start() {
mCountDownTimer = new CountDownTimer(5000, 1000) {
@Override
public void onTick(long millisUntilFinished) {
txtViewRest.setText("Rest Remaining: " + millisUntilFinished / 1000 + " seconds.");
}
@Override
public void onFinish() {
txtViewRest.setText("Done!");
showNotification();
}
}.start();
}
public void cancel() {
if (mCountDownTimer != null) {
mCountDownTimer.cancel();
txtViewRest.setText("Rest Remaining: 5 seconds");
} else return;
}
public void reset() {
if (mCountDownTimer != null) {
mCountDownTimer.cancel();
txtViewRest.setText("Rest Remaining: 5 Seconds");
} else return;
}
public void showNotification() {
NotificationCompat.Builder builder = new NotificationCompat.Builder(getContext());
builder.setSmallIcon(R.drawable.sheikoicon);
builder.setContentTitle("Sheiko Rest Timer");
builder.setContentText("Rest timer is up, start your set!");
builder.setDefaults(Notification.DEFAULT_SOUND|Notification.DEFAULT_VIBRATE);
builder.setAutoCancel(true);
Intent intent = new Intent(getActivity(), WorkoutDaysActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(getContext());
stackBuilder.addParentStack(WorkoutDaysActivity.class);
stackBuilder.addNextIntent(intent);
PendingIntent pendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_NO_CREATE);
builder.setContentIntent(pendingIntent);
NotificationManager NM = (NotificationManager) getActivity().getSystemService(Context.NOTIFICATION_SERVICE);
NM.notify(0, builder.build());
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
SharedPreferences pref = this.getActivity().getSharedPreferences("MyPref", 0);
View view = inflater.inflate(R.layout.monday_fragment, null);
txtViewRest = (TextView) view.findViewById(R.id.txtViewRest);
btnStart = (Button) view.findViewById(R.id.btnStart);
btnStop = (Button) view.findViewById(R.id.btnStop);
btnReset = (Button) view.findViewById(R.id.btnReset);
btnStart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
start();
}
});
btnStop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
cancel();
}
});
btnReset.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
reset();
}
});
Any and all help is greatly appreciated!
