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add firebase cloud messaging
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‎20-egg-timer/README.md

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# Egg Timer
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A timer app for cooking eggs, using notifications.
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A timer app for cooking eggs, using notifications and Firebase Cloud Messaging.
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<!-- <p align="center">
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<img src="screenshot.png" style="width:528px;max-width: 100%;">
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- customizing the notifications.
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- adding quick actions to make the notification interactive.
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- turning off notification badges.
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- pushing messages to the user via Firebase Cloud Messaging.
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- transfering data from a backend to the app.
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Based on [Using Android Notifications](https://developer.android.com/codelabs/advanced-android-kotlin-training-notifications#0) by Google Codelabs (2022).
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Based on 2 tutorials by Google Codelabs (2022):
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- [Using Android Notifications](https://developer.android.com/codelabs/advanced-android-kotlin-training-notifications#0)
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- [Android Firebase Cloud Messaging](https://codelabs.developers.google.com/codelabs/advanced-android-kotlin-training-notifications-fcm)

‎20-egg-timer/app/build.gradle

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implementation 'com.google.firebase:firebase-messaging:19.0.1'
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implementation 'android.arch.work:work-runtime:1.0.1'
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}
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apply plugin: 'com.google.gms.google-services'

‎20-egg-timer/app/src/main/AndroidManifest.xml

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android:enabled="true"
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android:exported="false">
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</receiver>
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<!-- TODO: Step 3.0 uncomment to start the service -->
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<service
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android:name=".MyFirebaseMessagingService"
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android:exported="false">
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<intent-filter>
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<action android:name="com.google.firebase.MESSAGING_EVENT"/>
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</intent-filter>
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</service>
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<!--&lt;!&ndash; [START fcm_default_icon] &ndash;&gt;-->
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<!--&lt;!&ndash;-->
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<!--Set custom default icon. This is used when no icon is set for incoming notification messages.-->
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<!--See README(https://goo.gl/l4GJaQ) for more.-->
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<!--&ndash;&gt;-->
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<meta-data
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android:name="com.google.firebase.messaging.default_notification_icon"
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android:resource="@drawable/common_google_signin_btn_icon_dark"/>
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<!--&lt;!&ndash;-->
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<!--Set color used with incoming notification messages. This is used when no color is set for the incoming-->
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<!--notification message. See README(https://goo.gl/6BKBk7) for more.-->
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<!--&ndash;&gt;-->
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<meta-data
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android:name="com.google.firebase.messaging.default_notification_color"
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android:resource="@color/colorAccent"/> <!-- [END fcm_default_icon] -->
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<!-- [START fcm_default_channel] -->
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<meta-data
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android:name="com.google.firebase.messaging.default_notification_channel_id"
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android:value="@string/breakfast_notification_channel_id" />
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</application>
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‎20-egg-timer/app/src/main/java/com/example/android/eggtimernotifications/MyFirebaseMessagingService.kt

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/*
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* Copyright (C) 2019 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.eggtimernotifications
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import android.app.NotificationManager
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import android.util.Log
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import androidx.core.content.ContextCompat
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import com.example.android.eggtimernotifications.util.sendNotification
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import com.google.firebase.messaging.FirebaseMessagingService
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import com.google.firebase.messaging.RemoteMessage
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class MyFirebaseMessagingService : FirebaseMessagingService() {
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/**
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* Called when message is received.
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*
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* @param remoteMessage Object representing the message received from Firebase Cloud Messaging.
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*/
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// [START receive_message]
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override fun onMessageReceived(remoteMessage: RemoteMessage?) {
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// Not getting messages here? See why this may be: https://goo.gl/39bRNJ
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Log.d(TAG, "From: ${remoteMessage?.from}")
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// TODO Step 3.5 check messages for data
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// Check if message contains a data payload.
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// TODO Step 3.6 check messages for notification and call sendNotification
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// Check if message contains a notification payload.
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}
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// [END receive_message]
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// tested with pixel 3 api 30
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// your emulator needs google play + google apis to receive notifications
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// reference: https://stackoverflow.com/questions/46464356/firebase-message-not-received-on-emulator/69045105#69045105
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override fun onNewToken(token: String?) {
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Log.d(TAG, "Refreshed token: $token")
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sendRegistrationToServer(token)
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super.onNewToken(token)
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}
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// [END on_new_token]
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/**
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* Persist token to third-party (your app) servers.
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*
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* @param token The new token.
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*/
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private fun sendRegistrationToServer(token: String?) {
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// TODO: Implement this method to send token to your app server.
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}
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/**
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* Create and show a simple notification containing the received FCM message.
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*
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* @param messageBody FCM message body received.
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*/
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private fun sendNotification(messageBody: String) {
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val notificationManager = ContextCompat.getSystemService(applicationContext, NotificationManager::class.java) as NotificationManager
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notificationManager.sendNotification(messageBody, applicationContext)
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}
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companion object {
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private const val TAG = "MyFirebaseMsgService"
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}
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}

‎20-egg-timer/app/src/main/java/com/example/android/eggtimernotifications/ui/EggTimerFragment.kt

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getString(R.string.egg_notification_channel_name)
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)
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// create another channel for fcm
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createChannel(
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getString(R.string.breakfast_notification_channel_id),
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getString(R.string.breakfast_notification_channel_name)
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)
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return binding.root
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}
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‎20-egg-timer/build.gradle

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dependencies {
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classpath 'com.android.tools.build:gradle:7.0.3'
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classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
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classpath 'com.google.gms:google-services:4.3.2'
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// NOTE: Do not place your application dependencies here; they belong
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// in the individual module build.gradle files
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}

‎README.md

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| 17 | [Fun Facts](https://github.com/solygambas/kotlin-projects/tree/main/17-fun-facts) | An app that displays fun facts about Android, using FirebaseUI Authentication. |
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| 18 | [Wander](https://github.com/solygambas/kotlin-projects/tree/main/18-wander) | A Google Maps app that displays customized maps and the user's location. |
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| 19 | [Treasure Hunt](https://github.com/solygambas/kotlin-projects/tree/main/19-treasure-hunt) | A real-world scavenger hunt using geofencing. |
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| 20 | [Egg Timer](https://github.com/solygambas/kotlin-projects/tree/main/20-egg-timer) | A timer app for cooking eggs, using notifications. |
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| 20 | [Egg Timer](https://github.com/solygambas/kotlin-projects/tree/main/20-egg-timer) | A timer app for cooking eggs, using notifications and Firebase Cloud Messaging. |
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These projects are adapted from various sources:
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