Not getting local Notification Sound in production build ionic 3 - ionic-framework

Question

I have an issue with ionic 3 local notification sound. The sound is coming when I did debug build.
It's not coming in production build and also I tried by setting the sound value as "res://platform_default"(not getting the sound). Please help me. Thanks in advance.
Below my codes.
import {Component} from '#angular/core';
import {IonicPage, NavController, NavParams, Platform, AlertController} from 'ionic-angular';
import {LocalNotifications} from '#ionic-native/local-notifications';
#IonicPage()
#Component({
selector: 'page-notifications',
templateUrl: 'notifications.html',
})
export class NotificationsPage {
data = {title: '', description: '', date: '', time: ''};
constructor(public navCtrl: NavController,
public localNotifications: LocalNotifications,
public platform: Platform,
public alertCtrl: AlertController) {
}
submit() {
console.log(this.data);
var date = new Date(this.data.date + " " + this.data.time);
console.log(date);
this.localNotifications.requestPermission().then((permission) => {
this.localNotifications.schedule({
id: 0,
text: 'Delayed ILocalNotification',
trigger: {at: date},
foreground:true,
vibrate: true,
led: {color: '#FF00FF', on: 500, off: 500},
data: {mydata: 'My hidden message this is'},
// sound: 'res://platform_default',
sound: this.setSound(),
});
let alert = this.alertCtrl.create({
title: 'Congratulation!',
subTitle: 'Notification setup successfully at ' + date,
buttons: ['OK']
});
alert.present();
this.data = {title: '', description: '', date: '', time: ''};
});
}
setSound() {
if (this.platform.is('android')) {
return 'file://assets/sounds/Rooster.mp3'
} else {
return 'file://assets/sounds/Rooster.caf'
}
}
}
In Dashboard Page
this.localNotifications.on('click').subscribe(
(datas: any) => {
alert('in_is');
alert(JSON.stringify(datas));
/*let alert = alertCtrl.create({
title: notification.title,
subTitle: json.mydata
});
alert.present();*/
});

Answer 1

Try assigning the mp3 sound by using ternary operator without calling the function to assign it
this.localNotifications.schedule({
id: 0,
text: 'Delayed ILocalNotification',
trigger: {at: date},
foreground:true,
vibrate: true,
led: {color: '#FF00FF', on: 500, off: 500},
data: {mydata: 'My hidden message this is'},
sound: this.platform.is('android') ? 'file://assets/sounds/Rooster.mp3' : 'file://assets/sounds/Rooster.caf',
});
Refer ionic documentation https://ionicframework.com/docs/native/local-notifications/