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androidbroadcastreceiverandroid-service

Show multiple notification

I am trying to implement a remainder concept in my app which airs a TV channel. Concept is that the user can set remainder for certain TV programs and the app shows a notification 5mins before the program airs on the channel. I am using the combination of AlarmManager, BroadcastReceiver and Service to handle the notification part.

Requirement: Show separate notification for different remainders. i.e. when user sets remainder for 15:26 and 15:27 then the app must show two notifications at 15:21 and 15:22

Problem: I am getting only one notification which is updated for all other remainders. i.e. app shows notification for 15:26 remainder and same notification is updated for 15:27

So friends help me with my problem.

Following is the just the sample app to perform above mentioned task:

enter image description here

Here are my classes:

MainActivity.java

public class MainActivity extends AppCompatActivity {

TextView time1, time2, time3, time4, time5, time6;
Button button1, button2, button3, button4, button5, button6;
Intent intent;
String endTime;

AlarmManager alarmManager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);

    time1 = findViewById(R.id.time1);
    button1 = findViewById(R.id.button1);
    time2 = findViewById(R.id.time2);
    button2 = findViewById(R.id.button2);
    time3 = findViewById(R.id.time3);
    button3 = findViewById(R.id.button3);
    time4 = findViewById(R.id.time4);
    button4 = findViewById(R.id.button4);
    time5 = findViewById(R.id.time5);
    button5 = findViewById(R.id.button5);
    time6 = findViewById(R.id.time6);
    button6 = findViewById(R.id.button6);

    time1.setText("15:26");
    time2.setText("15:27");
    time3.setText("15:28");
    time4.setText("15:29");
    time5.setText("15:30");
    time6.setText("15:31");

    button1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            Intent intent = new Intent("com.newitventure.remainder.START");
            int id = (int) System.currentTimeMillis();
            intent.setClass(MainActivity.this, ServiceRestarterBroadcastReceivers.class);
            intent.putExtra("id", id);
            intent.putExtra("time", time1.getText().toString());
            PendingIntent pi = PendingIntent.getBroadcast(MainActivity.this, id, intent, PendingIntent.FLAG_UPDATE_CURRENT);

            alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 60 * 1000, pi);
        }
    });

    button2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent("com.newitventure.remainder.START");
            int id = (int) System.currentTimeMillis();
            intent.setClass(MainActivity.this, ServiceRestarterBroadcastReceivers.class);
            intent.putExtra("id", id);
            intent.putExtra("time", time2.getText().toString());
            PendingIntent pi = PendingIntent.getBroadcast(MainActivity.this, id, intent, PendingIntent.FLAG_UPDATE_CURRENT);

            alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 60 * 1000, pi);
        }
    }); 
    button3.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent("com.newitventure.remainder.START");
            int id = (int) System.currentTimeMillis();
            intent.setClass(MainActivity.this, ServiceRestarterBroadcastReceivers.class);
            intent.putExtra("id", id);
            intent.putExtra("time", time3.getText().toString());
            PendingIntent pi = PendingIntent.getBroadcast(MainActivity.this, id, intent, PendingIntent.FLAG_UPDATE_CURRENT);

            alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 60 * 1000, pi);
        }
    }); 
    button4.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent("com.newitventure.remainder.START");
            int id = (int) System.currentTimeMillis();
            intent.setClass(MainActivity.this, ServiceRestarterBroadcastReceivers.class);
            intent.putExtra("id", id);
            intent.putExtra("time", time4.getText().toString());
            PendingIntent pi = PendingIntent.getBroadcast(MainActivity.this, id, intent, PendingIntent.FLAG_UPDATE_CURRENT);

            alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 60 * 1000, pi);
        }
    }); 
    button5.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent("com.newitventure.remainder.START");
            int id = (int) System.currentTimeMillis();
            intent.setClass(MainActivity.this, ServiceRestarterBroadcastReceivers.class);
            intent.putExtra("id", id);
            intent.putExtra("time", time5.getText().toString());
            PendingIntent pi = PendingIntent.getBroadcast(MainActivity.this, id, intent, PendingIntent.FLAG_UPDATE_CURRENT);

            alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 60 * 1000, pi);
        }
    }); 
    button6.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent("com.newitventure.remainder.START");
            int id = (int) System.currentTimeMillis();
            intent.setClass(MainActivity.this, ServiceRestarterBroadcastReceivers.class);
            intent.putExtra("id", id);
            intent.putExtra("time", time6.getText().toString());
            PendingIntent pi = PendingIntent.getBroadcast(MainActivity.this, id, intent, PendingIntent.FLAG_UPDATE_CURRENT);

            alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 60 * 1000, pi);
        }
    });

  }
}

ServiceRestarterBroadcastReceivers.java

public class ServiceRestarterBroadcastReceivers extends BroadcastReceiver {

Context context;
long millis;

@Override
public void onReceive(Context context, Intent intent) {

    this.context = context;

    String action = intent.getAction();

    if (action.equalsIgnoreCase("com.newitventure.remainder.STOP_SERVICE")) {
        context.stopService(intent);
    } else {
        final String programTime = intent.getStringExtra("time");
        final int id = intent.getIntExtra("id", 0);

        millis = System.currentTimeMillis();

        calculateMinute(programTime, id);

    }

}

private void calculateMinute(String programTime, int id) {

    SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:mm");
    Date startTime = new Date();
    Date endTime = new Date();

    try {
        startTime = simpleDateFormat.parse(simpleDateFormat.format(millis));
        endTime = simpleDateFormat.parse(programTime);
    } catch (Exception e) {
        e.printStackTrace();
    }

    long difference = endTime.getTime() - startTime.getTime();

    if (difference < 0) {
        Date dateMax = new Date();
        Date dateMin = new Date();
        try {
            dateMax = simpleDateFormat.parse("24:00");

            dateMin = simpleDateFormat.parse("00:00");

        } catch (Exception e) {
            e.printStackTrace();
        }
        difference = (dateMax.getTime() - startTime.getTime()) + (endTime.getTime() - dateMin.getTime());
    }

    String hour = String.format("%02d", TimeUnit.MILLISECONDS.toHours(difference));
    String inMins = String.format("%02d", TimeUnit.MILLISECONDS.toMinutes(difference) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(difference)));
    Log.d("lala", "onCreate: min" + hour + " " + inMins);

    if (hour.equalsIgnoreCase("00")) {
        if (inMins.equalsIgnoreCase("05")) {
                Intent background = new Intent(context, AlarmServiceClass.class);
                background.putExtra("time", programTime);
                background.putExtra("id", id);
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                    context.startForegroundService(background);
                } else {
                    context.startService(background);
                }
        }
    }
}
}

AlarmServiceClass.java

public class AlarmServiceClass extends Service {

long millis;
int id;
String programTime;
Notification notification;
NotificationManager notificationManager;
IntentFilter intentFilter;


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

    Log.d("lala", "onCreate: ");
    notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

    return START_STICKY;

}

private void showNotification(String programTime, int id) {

    RemoteViews views = new RemoteViews(getPackageName(), R.layout.notification);

    String CHANNEL_ID = "2018";
    CharSequence channelName = "Vinay";

    Intent recentIntent = new Intent(this, MainActivity.class);
    recentIntent.setAction("com.newitventure.remainder.STOP_SERVICE");
    recentIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);
    PendingIntent pendInt = PendingIntent.getActivity(this, id,
            recentIntent, PendingIntent.FLAG_ONE_SHOT);

    views.setTextViewText(R.id.text, programTime);

    notification = new NotificationCompat.Builder(this)
            .setCustomContentView(views)
            .setContentIntent(pendInt)
            .setAutoCancel(true)
            .setSmallIcon(R.drawable.ic_launcher_foreground)
            .setChannelId(CHANNEL_ID)
            .build();


    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        NotificationChannel channel = new NotificationChannel(CHANNEL_ID,
                channelName, NotificationManager.IMPORTANCE_LOW);
        channel.setSound(null, null); 
        notificationManager.createNotificationChannel(channel);
    }

    startForeground(id, notification);
  }
}
Solution

  • I found the solution to my problem. Instead of starting service using startForeground(id, notification) I used notificationManager.notify(id, notification) and voila! it worked. I get all the 6 notifications.

    But problem still exists when I want to show notification even if the app is killed from the recent apps. Android Oreo restricts app from showing background notification so it forces me to use startForeground(id, notification). Hence I am back to square one. Anyone??