Develop Reference

AlarmManager + NotificationManager not working

First of all I would like to thank you for clicking on this thread.
Thank you so much for taking your time to read this.
I was planning for the application push a notification on a specific time.
I followed some tutorials online but it seems it doesn't work.
There is no error message on the code itself but no notification is coming out.
Here's my "Notification_receiver.java" file:
package com.example.reviewerapplication;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import androidx.annotation.RequiresApi;
import androidx.core.app.NotificationCompat;
public class Notification_receiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
NotificationManager notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
Intent repeating_intent = new Intent(context,Chapterchoice.class);
String daily10 = "daily";
intent.putExtra("daily",daily10);
repeating_intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(context,100,repeating_intent,PendingIntent.FLAG_UPDATE_CURRENT);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
.setContentIntent(pendingIntent)
.setSmallIcon(R.drawable.ic_launcher)
.setContentTitle("Sample Title")
.setContentText("same message")
.setAutoCancel(true);
if (intent.getAction().equals("MY_NOTIFICATION_MESSAGE")) {
notificationManager.notify(100, builder.build());
}
}
}
This is what is on my MainActivity:
//Daily Notification
val calendar = Calendar.getInstance()
calendar.set(Calendar.HOUR_OF_DAY,21)
calendar.set(Calendar.MINUTE,53)
calendar.set(Calendar.SECOND,0)
val intent2 = Intent(this, Notification_receiver::class.java)
intent2.setAction("MY_NOTIFICATION_MESSAGE")
var pendingIntent = PendingIntent.getBroadcast(this,100,intent2,PendingIntent.FLAG_UPDATE_CURRENT )
var alarmManager = getSystemService(Context.ALARM_SERVICE) as AlarmManager
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,calendar.timeInMillis,AlarmManager.INTERVAL_DAY,pendingIntent)

I actually got it fixed just now.
my issue is that I used "activity" in the Manifest instead of using "receiver"

Notification sound is not created when phone is locked

I'm developing a chat application and I am using Firebase Cloud Messaging. Notification works properly. When the phone is locked, the notification is received properly, but the sound is not generated.
Any help is appreciated.
FCMMessagingservice.java
package com.synergywebdesigners.nima;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.graphics.Color;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.PowerManager;
import android.support.v4.app.NotificationCompat;
import android.view.View;
import android.view.WindowManager;
import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;
import static android.app.Notification.VISIBILITY_PUBLIC;
import static com.android.volley.VolleyLog.TAG;
/**
* Created by Ashish Shahi on 13-04-2017.
*/
public class FcmMessagingService extends FirebaseMessagingService {
long[] pattern = {500,500,500,500,500,500,500,500,500};
#Override
public void onMessageReceived(RemoteMessage remoteMessage) {
PowerManager pm = (PowerManager)getSystemService(
Context.POWER_SERVICE);
PowerManager.WakeLock wl = pm.newWakeLock(
PowerManager.SCREEN_DIM_WAKE_LOCK
| PowerManager.ON_AFTER_RELEASE,
TAG);
String title = remoteMessage.getNotification().getTitle();
String message = remoteMessage.getNotification().getBody();
Intent intent = new Intent(this, Memberlist.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
PendingIntent.FLAG_ONE_SHOT);
Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.mipmap.ic_action_title)
.setContentTitle(title)
.setContentText(message)
.setAutoCancel(true)
.setSound(defaultSoundUri)
.setContentIntent(pendingIntent)
.setDefaults(0)
.setLights(Color.RED, 500, 500)
.setPriority(Notification.PRIORITY_HIGH)
.setOngoing(true)
;
wl.acquire();
// ... do work...
wl.release();
/*notificationBuilder.setLights(Color.BLUE, 500, 500);
long[] pattern = {500,500,500,500,500,500,500,500,500};
notificationBuilder.setVibrate(pattern);*/
notificationBuilder.setStyle(new NotificationCompat.InboxStyle());
NotificationManager notificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0, notificationBuilder.build());
}
}

Go to FCM CONSOLE and enable sound and define key 'sound'==>'default';
and go to php cansole and and type Following code 'sound'==>'default'; thats work properly

Android notification from service does not open activity

Updated MyService #CommonsWare
i have a service that if started will set up an alarm that triggers the notification.
This works fine and the alarms are canceled if the service is stopped.
i am trying to get the notification to open a new activity class but can not get it done
my service class is the following:
package com.example.andtip;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.support.v4.app.NotificationCompat;
public class BReceiver extends BroadcastReceiver {
private static final int MY_NOTIFICATION_ID=1;
NotificationManager notificationManager;
Notification myNotification;
public void onReceive(Context context, Intent intent) {
Intent myIntent = new Intent(context, DoSomething.class);
PendingIntent pi = PendingIntent.getBroadcast(context, 0, new Intent("com.example.andtip"),0 );
PendingIntent pi2 = PendingIntent.getActivity(context, 0, myIntent,0 );
myNotification=new NotificationCompat.Builder(context)
.setContentTitle("This is a notification from the example alarm application.")
.setContentText("Notification")
.setTicker("Notification!")
.setWhen(System.currentTimeMillis())
.setContentIntent(pi)
.setDefaults(Notification.DEFAULT_SOUND)
.setAutoCancel(true)
.setSmallIcon(R.drawable.ic_launcher)
.build();
notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(MY_NOTIFICATION_ID, myNotification);
}
}
how should i link the intent pi2 to the notification?

i am trying to get the notification to open a new activity class but can not get it done
You are using getBroadcast() to create your PendingIntent. Use getActivity() to create a PendingIntent that starts up an activity. Make sure that the Intent you put in the PendingIntent is for an activity, and make sure that the activity has its entry in the manifest.

How to show Notifications after every 4 hours?

I want the notification to be shown after every 4 hours after the Activity is Destroyed.
Here's my code snippet of main activity's onDestroy().
#Override
protected void onDestroy() {
Intent notificationIntent = new Intent(this, Notification.class);
PendingIntent contentIntent = PendingIntent.getService(this, 0, notificationIntent,
PendingIntent.FLAG_CANCEL_CURRENT);
AlarmManager am = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
am.cancel(contentIntent);
am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, System.currentTimeMillis(), 1000*00*00*04, contentIntent);
}
and here is my Notification.class code snippet:
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.media.RingtoneManager;
import android.os.IBinder;
import android.support.v4.app.NotificationCompat;
public class Notification extends Service {
#Override
public void onCreate() {
super.onCreate();
Intent mainIntent = new Intent(this, Main.class);
NotificationManager notificationManager
= (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
android.app.Notification noti = new NotificationCompat.Builder(this)
.setAutoCancel(true)
.setContentIntent(PendingIntent.getActivity(this, 0, mainIntent,
PendingIntent.FLAG_UPDATE_CURRENT))
.setContentTitle("Title")
.setContentText("It's been so Long!!!")
.setSubText("Please return back to App")
.setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
.setVibrate(new long[] {1000,1000,1000,1000})
.setSmallIcon(R.drawable.ic_launcher)
.setTicker("Important Notification")
.setWhen(System.currentTimeMillis())
.build();
notificationManager.notify(0, noti);
}
#Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
}
I am working on this since so many days but I am unable to complete the task.
Any Help would be highly Appreciated.
Thanks in Advance!
HELP please!!!

You're multiplying by 0 here:
am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
System.currentTimeMillis(), 1000*00*00*04, contentIntent);
The third parameters is the "interval in milliseconds between subsequent repeats of the alarm", so your alarm will be only be fired once because the interval is, well, zero. You need to change the third parameter to four hours, which in milliseconds translates to 3600 * 1000 * 4.
am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,
System.currentTimeMillis(), 3600 * 1000 * 4, contentIntent);

android no notification popup in statusbar

there're two problems here. I try to let user select a specific time to make app reminder users to use app. Once user set up a time say 8:00 pm. The notification should pop up every day. However, After I used
"NotificationManager" and "Notification"
first of all, there's nothing pop-up. For example, now is 1:19 am in AU, then, i set-up this app to 1:20 am to display the notification in the status bar as a test.
Secondly, if in my TabBar class i use
nm.cancel(getIntent().getExtras().getInt("NotifID"));
It will get a null pointer exception
Here is my code:
TabBar.class
NotificationManager nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
nm.cancel(getIntent().getExtras().getInt("NotifID"));
Notification.class
package com.example.tabpro;
import java.util.Calendar;
import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TimePicker;
public class SettingNotification extends Activity{
TimePicker timePicker;
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.setting_notification);
Button btnset = (Button) findViewById(R.id.btnSetAlarm);
btnset.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
timePicker = (TimePicker) findViewById(R.id.timePicker_settime);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, timePicker.getCurrentHour());
calendar.set(Calendar.MINUTE, timePicker.getCurrentMinute());
calendar.set(Calendar.SECOND, 0);
Intent i = new Intent("com.example.tabpro.DisplayNotification");
Intent i2 = new Intent(SettingNotification.this, TabBar.class);
i.putExtra("NotifID", 1);
PendingIntent displayIntent = PendingIntent.getActivity(
getBaseContext(), 0, i, 0);
alarmManager.set(AlarmManager.RTC_WAKEUP,
calendar.getTimeInMillis(), displayIntent);
startActivity(i2);
}
});
}
}
DisplayNotification.class
package com.example.tabpro;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
public class DisplayNotification extends Activity {
#Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
int notifID = getIntent().getExtras().getInt("NotifID");
Intent i = new Intent("com.example.tabpro.TabBar");
i.putExtra("NotifID", notifID);
PendingIntent detailsIntent = PendingIntent.getActivity(this, 0, i, 0);
NotificationManager nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
Notification notif = new Notification(R.drawable.ic_launcher, "Time's up!", System.currentTimeMillis());
CharSequence from = "AlarmManager - Time's up!";
CharSequence message = "This is your alert, courtesy of the AlarmManager";
notif.setLatestEventInfo(this, from, message, detailsIntent);
finish();
}
}

You need to call notify() on your NotificationManager to actually show the Notification. Since you never call this method, your Notification is never shown.
Your NullPointerException is likely a different problem. For that, you should do some debugging yourself. First, you need to determine what is null. Then determine why it is null and fix it. In your code, the most likely candidates for causing the NPE in TabBar are nm, getIntent(), and getExtras().

Hope this helps :
You need to call notify() method to display notification in your notification tray of your device.
Below is the code for that:
Notification notification;
PendingIntent contentIntent = PendingIntent.getActivity(context, 0,new Intent(context, YourActivity.class), 0);
NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
notification = builder.setContentIntent(contentIntent)
.setSmallIcon(icon).setTicker(yourappname).setWhen(0)
.setAutoCancel(true).setContentTitle(yourappname)
.setContentText(yourmessage).build();
notificationManager.notify(0, notification);