.getStringExtra returning null value instead String

Question

Getting value in putExtra But cant retrieve in getStringExtra.

public class StartNotificationReceiver extends BroadcastReceiver{




private void sendTodayNotification() {
    DateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy");
    Date todateDate = new Date();
    String TodayDate_String = dateFormat.format(todateDate);
    String Val=AppSettingsPref.getStringValue(context, AppSettingsPref.KEY_TODAY_DATE_AND_TIME, "");
    if(!Val.equals(TodayDate_String))
    {
        AppSettingsPref.saveString(context, AppSettingsPref.KEY_TODAY_DATE_AND_TIME, TodayDate_String);

        final HGDate englishDate = new HGDate(context);
        englishDate.setGregorian(Calendar.YEAR, Calendar.MONTH + 1, 1);
        final HGDate islamicDateToday = new HGDate(englishDate);
        islamicDateToday.toHigri();
        int islamicDayToday = islamicDateToday.getDay();
        int islamicMonthToday = islamicDateToday.getMonth();

        String otherMonth = Dates.islamicMonthName(context, islamicDateToday.getMonth() - 1);
        int adjustedDate = AppSettingsPref.getIntValue(context, AppSettingsPref.CURRENT_ADJUSTMENT_KEY, 0);
        String todayDateTimeinhijri = islamicDateToday.getDay() + (adjustedDate) + " "
                + otherMonth + " " + islamicDateToday.getYear();




        Intent intent = new Intent(context,NotificationReceiver.class);
    -------->intent.putExtra("todayDateTimeinhijri", todayDateTimeinhijri.toString());<-----------




        databaseAccess = DatabaseAccess.getInstance(context);
        databaseAccess.open();
        ArrayList<Event> events = databaseAccess.showEventsByMuslimType(muslimType);
        for (int i = 0; i < events.size(); i++) {
            Event event = events.get(i);
            String[] date = event.getHejriDate().split("-");
            int islamicDayOfEvent = Integer.parseInt(date[0].trim());
            int islamicMonthOfEvent = Integer.parseInt(date[1].trim());
            boolean isViladat = event.isVilaadat;
            if (islamicDayToday == islamicDayOfEvent && islamicMonthToday == islamicMonthOfEvent) {
                makeNotification(event);
            }
        }
    }

intent.putExtra("todayDateTimeinhijri", todayDateTimeinhijri.toString());

This is where .getStringExtra is getting null value

public class NotificationReceiver extends BroadcastReceiver{

 public void onReceive(Context context, Intent intent) {
        this.context = context;
}
        todayDateTime2 = intent.getStringExtra("todayDateTimeinhijri");

}

The extra code is removed for better understanding Thanks in advance

Help will be appreciated. cant find solution.

Can't see where you send the intent. Can you add that code please? — Ridcully, Dec 02 '20 at 04:45
Putting the extra in the intent does not send it. There sould be a sendBroadcast() call or similar somewhere. — Ridcully, Dec 02 '20 at 05:00

TomInCode · Accepted Answer · 2020-12-02T06:45:55.527

Where do you send (or start) the intent with the parameter "todayDateTimeinhijri"? If you don't send the intent the NotificationReceiver isn't able to receive anything.

//example activity using receiver and send intent via broadcast ( sendBroadcast(intent) )

public class Example extends AppCompatActivity {
    
    private NotificationReceiver mNotificationReceiver;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        mNotificationReceiver = new NotificationReceiver();
        IntentFilter intentFilter = new IntentFilter("your_action");
        registerReceiver(mNotificationReceiver, intentFilter);

        StartNotificationReceiver mStartNotificationReceiver = new StartNotificationReceiver(getApplicationContext());
        mStartNotificationReceiver.sendTodayNotification();
    }
    
    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mNotificationReceiver != null) {
            unregisterReceiver(mNotificationReceiver);
        }
    }
    
    private class NotificationReceiver extends BroadcastReceiver {
        Context context;
        @Override
        public void onReceive(Context context, Intent intent) {
            this.context = context;
            String action = intent.getAction();// should be "your_action"
            String todayDateTime2 = intent.getStringExtra("todayDateTimeinhijri");
            Log.i("NotificationReceiver","action: " + action );
            Log.i("NotificationReceiver","dateTime: " + todayDateTime2 );
        }
    }

    public class StartNotificationReceiver {

        private Context context;

        public StartNotificationReceiver(Context ctx){
            this.context = ctx;
        }

        public void sendTodayNotification() {
            Intent intent = new Intent("your_action");
            intent.putExtra("todayDateTimeinhijri", "your String value");
            context.sendBroadcast(intent);
        }
    }
}

as Ridcully wrote, you need to send the intent like sendBroadcast(intent); or context.sendBroadcast(intent); don't forget to register the NotificationReceiver in the appropriate context. Just take look: https://stackoverflow.com/a/28861229/8391649 — TomInCode, Dec 02 '20 at 05:12
public class NotificationReceiver extends BroadcastReceiver{ Context context; public void onReceive(Context context, Intent intent) { this.context = context; String todayDateTime2 = intent.getStringExtra("todayDateTimeinhijri"); } } how do i register here ? — Mukhtar Ali, Dec 02 '20 at 05:32
i have send the intent like context.sendBroadcast(intent); will it work ? or i need to do changes in notificationreciver? — Mukhtar Ali, Dec 02 '20 at 05:33
yes it will work. I added an example class in my answer above. Just try it. — TomInCode, Dec 02 '20 at 06:48

score 0 · Answer 2 · answered Dec 02 '20 at 05:01

0

Putting the extra in the intent does not send it. There sould be a sendBroadcast() call or similar somewhere.

answered Dec 02 '20 at 05:01

Ridcully

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.getStringExtra returning null value instead String

2 Answers2