Question

Trying to convert my iOS app to android, I know I can’t port it so I wrote it from scratch
How can I covert this notification to Android Java code?

-(IBAction)turnon {

    NSDateComponents *comps = [[NSDateComponents alloc] init];
    [comps setDay:28];
    [comps setMonth:9];
    [comps setYear:2012];
    [comps setHour:8];
    [comps setMinute:25];
    NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    NSDate *fireDate = [gregorian dateFromComponents:comps];

    UILocalNotification *alarm = [[UILocalNotification alloc] init];

    alarm.fireDate = fireDate;
    alarm.repeatInterval = NSDayCalendarUnit;
    alarm.soundName = @"msl.aiff";
    alarm.alertBody = @"This is a message..";
    alarm.timeZone = [NSTimeZone defaultTimeZone];

    [[UIApplication sharedApplication] scheduleLocalNotification:alarm];

I’ve searched the web for like 4 hours now and I think this is simple for an Android developer but since I just started I just don’t have any idea how to do this.

Any help is really appreciated!

Answer 1

This is what your looking for:
You can use the alarm manager to show notifications at specific times, even when your app is not running at all.

http://developer.android.com/reference/android/app/AlarmManager.html

Everyday notifications at certain time

This one is useful to:

Using Alarmmanager to start a service at specific time

Edit see comments:

You can the AlarmManager for this, first create you self some kind of reciever.

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class AlarmReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        Intent dailyUpdater = new Intent(context, MyService.class);
        context.startService(dailyUpdater);
        Log.d("AlarmReceiver", "started service");
    }
}

Than you need to create the service which is going to show the notifications

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.support.v4.app.NotificationCompat;
import android.util.Log;
import android.widget.Toast;

public class MyService extends Service {
    private NotificationManager mNM;


    private int NOTIFICATION = 546;

    public class LocalBinder extends Binder {
        MyService getService() {
            return MyService.this;
        }
    }

    @Override
    public void onCreate() {
        mNM = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

        showNotification();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        showNotification();
        return START_STICKY;
    }

    @Override
    public void onDestroy() {
        mNM.cancel(NOTIFICATION);
        Toast.makeText(this, "stopped service", Toast.LENGTH_SHORT).show();
    }

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

    private final IBinder mBinder = new LocalBinder();

    private void showNotification() {
        Toast.makeText(this, "show notification", Toast.LENGTH_SHORT).show();

        //notification code here


    }
}

And finally you need to set the alarm:

private void setRecurringAlarm(Context context) {
    Calendar updateTime = Calendar.getInstance();
    updateTime.set(Calendar.HOUR_OF_DAY, 20);
    updateTime.set(Calendar.MINUTE, 30);

    Intent open = new Intent(context, AlarmReceiver.class);
    open.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, open, PendingIntent.FLAG_CANCEL_CURRENT);
    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, SystemClock.elapsedRealtime() + 5000, 10000, pendingIntent); 
}

And before you make a test run add your Receiver and Service to your manifest file:

<service android:name=".MyService"></service>
<receiver android:name=".AlarmReceiver"></receiver>