How to send notification if user inactive for 3 days

Question

I am developing an android app and I want to send \"We Miss You\" notification to user if he/she is inactive for more than 3 days. This means if the user does not open our a

Answer 1

You want to set an alarm that starts a short-running service once per day. All that service does is to check something like a shared preference for the last-used-time. If that time is more than 3 days old, then the service sends a notification. Either way, the service then exits.

Alternatively, your app could submit an alarm, each time it runs, that is defined to fire in 3 days and defined to replace any pre-existing alarm with the same ID. That alarm would be defined to open a short-running service that sends a notification.

Here's some sample code that demonstrates the second approach. As written, it only updates the run time upon start-up. If your app is long-running, you'll want to call recordRunTime() periodically. The deprecated method getNotification() could be replaced with build() if the Notification.Builder object was replaced with a NotificationCompat.Builder. You can use the commented out line for delay to test with a shorter delay time.

MainActivity.java:

package com.example.comeback;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

public class MainActivity extends Activity {

private final static String TAG = "MainActivity";
public final static String PREFS = "PrefsFile";

private SharedPreferences settings = null;
private SharedPreferences.Editor editor = null;

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

    // Save time of run:
    settings = getSharedPreferences(PREFS, MODE_PRIVATE);
    editor = settings.edit();

    // First time running app?
    if (!settings.contains("lastRun"))
        enableNotification(null);
    else
        recordRunTime();

    Log.v(TAG, "Starting CheckRecentRun service...");
    startService(new Intent(this,  CheckRecentRun.class));
}

public void recordRunTime() {
    editor.putLong("lastRun", System.currentTimeMillis());
    editor.commit();        
}

public void enableNotification(View v) {
    editor.putLong("lastRun", System.currentTimeMillis());
    editor.putBoolean("enabled", true);                
    editor.commit();        
    Log.v(TAG, "Notifications enabled");
}

public void disableNotification(View v) {
    editor.putBoolean("enabled", false);                
    editor.commit();        
    Log.v(TAG, "Notifications disabled");
}

}

CheckRecentRun.java:

package com.example.comeback;

import android.app.AlarmManager;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.IBinder;
import android.util.Log;

public class CheckRecentRun extends Service {

    private final static String TAG = "CheckRecentPlay";
    private static Long MILLISECS_PER_DAY = 86400000L;
    private static Long MILLISECS_PER_MIN = 60000L;

//  private static long delay = MILLISECS_PER_MIN * 3;   // 3 minutes (for testing)
    private static long delay = MILLISECS_PER_DAY * 3;   // 3 days

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

        Log.v(TAG, "Service started");                
        SharedPreferences settings = getSharedPreferences(MainActivity.PREFS, MODE_PRIVATE);

        // Are notifications enabled?
        if (settings.getBoolean("enabled", true)) {
            // Is it time for a notification?
            if (settings.getLong("lastRun", Long.MAX_VALUE) < System.currentTimeMillis() - delay)
                sendNotification();

        } else {        
            Log.i(TAG, "Notifications are disabled");
        }

        // Set an alarm for the next time this service should run:
        setAlarm();

        Log.v(TAG, "Service stopped");        
        stopSelf();
    }

    public void setAlarm() {

        Intent serviceIntent = new Intent(this, CheckRecentRun.class);
        PendingIntent pi = PendingIntent.getService(this, 131313, serviceIntent,
                                                    PendingIntent.FLAG_CANCEL_CURRENT);

        AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        am.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + delay, pi);
        Log.v(TAG, "Alarm set");        
    }

    public void sendNotification() {

        Intent mainIntent = new Intent(this, MainActivity.class);
        @SuppressWarnings("deprecation")
        Notification noti = new Notification.Builder(this)
            .setAutoCancel(true)
            .setContentIntent(PendingIntent.getActivity(this, 131314, mainIntent,
                              PendingIntent.FLAG_UPDATE_CURRENT))
            .setContentTitle("We Miss You!")
            .setContentText("Please play our game again soon.")
            .setDefaults(Notification.DEFAULT_ALL)
            .setSmallIcon(R.drawable.ic_launcher)
            .setTicker("We Miss You! Please come back and play our game again soon.")
            .setWhen(System.currentTimeMillis())
            .getNotification();

        NotificationManager notificationManager
            = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(131315, noti);

        Log.v(TAG, "Notification sent");        
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

main_activity_layout:

strings.xml:

    Come Back
    Enable Notifications
    Disable Notifications

AndroidManifest.com: