Notifications can't show in my app #231

import { Observable } from "tns-core-modules/data/observable";
import * as pushPlugin from "nativescript-push-notifications";
export class HelloWorldModel extends Observable {
 private pushSettings = {
 // Android settings
 senderID: "387819224537", // Android: Required setting with the sender/project number
 notificationCallbackAndroid: (stringifiedData: String, fcmNotification: any) => {
 const notificationBody = fcmNotification && fcmNotification.getBody();
 console.log(notificationBody)
 this.updateMessage("Message received!\n" + notificationBody + "\n" + stringifiedData);
 }
 // iOS settings
 // badge: true, // Enable setting badge through Push Notification
 // sound: true, // Enable playing a sound
 // alert: true, // Enable creating a alert
 // notificationCallbackIOS: (message: any) => {
 // this.updateMessage("Message received!\n" + JSON.stringify(message));
 // }
 };
 private _counter: number;
 private _message: string;
 constructor() {
 super();
 this.message = "";
 this.updateMessage("App started.");
 let self = this;
 this.onRegisterButtonTap();
 }
 get message(): string {
 return this._message;
 }
 set message(value: string) {
 if (this._message !== value) {
 this._message = value;
 this.notifyPropertyChange("message", value);
 }
 }
 onCheckButtonTap() {
 let self = this;
 pushPlugin.areNotificationsEnabled((areEnabled: Boolean) => {
 self.updateMessage("Are Notifications enabled: " + !!areEnabled);
 });
 }
 onRegisterButtonTap() {
 let self = this;
 pushPlugin.register(this.pushSettings, (token: String) => {
 self.updateMessage("Device registered. Access token: " + token);
 // token displayed in console for easier copying and debugging durng development
 console.log("Device registered. Access token: " + token);
 if (pushPlugin.registerUserNotificationSettings) {
 pushPlugin.registerUserNotificationSettings(() => {
 self.updateMessage("Successfully registered for interactive push.");
 }, (err) => {
 self.updateMessage("Error registering for interactive push: " + JSON.stringify(err));
 });
 }
 }, (errorMessage: String) => {
 self.updateMessage(JSON.stringify(errorMessage));
 });
 }
 onUnregisterButtonTap() {
 let self = this;
 pushPlugin.unregister(
 (successMessage: String) => {
 self.updateMessage(successMessage);
 },
 (errorMessage: String) => {
 self.updateMessage(JSON.stringify(errorMessage));
 },
 this.pushSettings
 );
 }
 private updateMessage(text: String) {
 this.message += text + "\n";
 }
}

import * as application from 'application';
import firebase = require("nativescript-plugin-firebase");
firebase.init({
}).then(
 (instance) => {
 console.log("Fierbase init done!");
 },
 (error) => {
 console.log("Firebase init error: " + error);
 }
);
application.run({ moduleName: 'app-root' });

<StackLayout class="p-20">
	<Button text="Are notifications enabled?" tap="{{ onCheckButtonTap }}" android:visibility="collapsed" class="btn" />
	<Button text="Register device" tap="{{ onRegisterButtonTap }}" class="btn" />
	<Button text="Unregister device" tap="{{ onUnregisterButtonTap }}" class="btn" />
	<Label text="Log:" class="h1" />
	<ScrollView orientation="vertical">
		<Label text="{{ message }}" class="h2" textWrap="true" />
	</ScrollView>
</StackLayout>