Implement the foundation for remote push notifications

app/build.gradle

@@ -58,10 +58,11 @@ dependencies {
     implementation 'io.coil-kt:coil:0.9.5'
 
     // Firebase
-    implementation 'com.google.firebase:firebase-analytics:17.4.4'
-    implementation 'com.google.firebase:firebase-crashlytics:17.1.1'
+    implementation 'com.google.firebase:firebase-analytics:17.5.0'
+    implementation 'com.google.firebase:firebase-crashlytics:17.2.1'
+    implementation 'com.google.firebase:firebase-firestore-ktx:21.6.0'
+    implementation 'com.google.firebase:firebase-messaging:20.2.4'
     implementation 'com.google.firebase:firebase-perf:19.0.8'
-    implementation 'com.google.firebase:firebase-firestore-ktx:21.5.0'
 
     implementation 'androidx.recyclerview:recyclerview:1.1.0'
 

app/src/main/AndroidManifest.xml

@@ -5,6 +5,7 @@
     <uses-permission android:name="android.permission.INTERNET" />
 
     <application
+        android:name=".MainApplication"
         android:allowBackup="true"
         android:fullBackupContent="@xml/backup_descriptor"
         android:icon="@mipmap/ic_launcher"
@@ -20,6 +21,15 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <service
+            android:name=".fcm.MyFirebaseMessagingService"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="com.google.firebase.MESSAGING_EVENT" />
+            </intent-filter>
+        </service>
+        <meta-data
+            android:name="com.google.firebase.messaging.default_notification_icon"
+            android:resource="@mipmap/ic_notification" />
     </application>
-
 </manifest>

app/src/main/java/com/theuhooi/uhooipicbook/MainApplication.kt

@@ -0,0 +1,41 @@
+package com.theuhooi.uhooipicbook
+
+import android.app.Application
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.content.Context
+
+class MainApplication : Application() {
+
+    // region View Life-Cycle Methods
+
+    override fun onCreate() {
+        super.onCreate()
+        createNotificationChannels()
+    }
+
+    // endregion
+
+    // region Other Private Methods
+
+    private fun createNotificationChannels() {
+        val channels = listOf(
+            createInfoNotificationChannel()
+        )
+        val notificationManager =
+            getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+        channels.forEach { notificationManager.createNotificationChannel(it) }
+    }
+
+    private fun createInfoNotificationChannel(): NotificationChannel {
+        val id = getString(R.string.info_notification_channel_id)
+        val name = getString(R.string.info_notification_channel_name)
+        val importance = NotificationManager.IMPORTANCE_HIGH
+        return NotificationChannel(id, name, importance).apply {
+            description = getString(R.string.info_notification_channel_description)
+        }
+    }
+
+    // endregion
+
+}

app/src/main/java/com/theuhooi/uhooipicbook/fcm/MyFirebaseMessagingService.kt

@@ -0,0 +1,60 @@
+package com.theuhooi.uhooipicbook.fcm
+
+import android.app.NotificationManager
+import android.app.PendingIntent
+import android.content.Context
+import android.content.Intent
+import android.media.RingtoneManager
+import androidx.core.app.NotificationCompat
+import com.google.firebase.messaging.FirebaseMessagingService
+import com.google.firebase.messaging.RemoteMessage
+import com.theuhooi.uhooipicbook.MainActivity
+import com.theuhooi.uhooipicbook.R
+
+class MyFirebaseMessagingService : FirebaseMessagingService() {
+
+    // region Stored Instance Properties
+
+    private val infoNotificationId = 0
+
+    // endregion
+
+    // region FirebaseMessagingService
+
+    override fun onMessageReceived(message: RemoteMessage) {
+        super.onMessageReceived(message)
+
+        message.notification?.let {
+            sendInfoNotification(it.title ?: getString(R.string.app_name), it.body ?: "")
+        }
+    }
+
+    // endregion
+
+    // region Other Private Methods
+
+    private fun sendInfoNotification(title: String, text: String) {
+        sendNotification(title, text, getString(R.string.info_notification_channel_id), this.infoNotificationId)
+    }
+
+    private fun sendNotification(title: String, text: String, channelId: String, notificationId: Int) {
+        val intent = Intent(this, MainActivity::class.java).apply {
+            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
+        }
+        val pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT)
+        val defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_RINGTONE)
+        val notification = NotificationCompat.Builder(this, channelId)
+            .setSmallIcon(R.mipmap.ic_notification)
+            .setContentTitle(title)
+            .setContentText(text)
+            .setStyle(NotificationCompat.BigTextStyle().bigText(text))
+            .setPriority(NotificationCompat.PRIORITY_DEFAULT)
+            .setContentIntent(pendingIntent)
+            .setAutoCancel(true)
+            .setSound(defaultSoundUri)
+            .build()
+        val notificationManager =
+            getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
+        notificationManager.notify(notificationId, notification)
+    }
+}

app/src/main/res/values/strings.xml

@@ -2,6 +2,10 @@
     <string name="app_name">UhooiPicBook</string>
     <string name="icon_description">Icon</string>
 
+    <string name="info_notification_channel_id">info</string>
+    <string name="info_notification_channel_name">お知らせ</string>
+    <string name="info_notification_channel_description">お知らせ</string>
+
     <string name="name_dummy">uhooi</string>
     <string name="description_dummy">ゆかいな　みどりの　せいぶつ。\nわるそうに　みえるが　むがい。</string>
 </resources>

build.gradle

@@ -2,7 +2,7 @@
 
 buildscript {
     ext {
-        kotlin_version = '1.3.72'
+        kotlin_version = '1.4.10'
         nav_version = '2.3.0'
         detekt_version = '1.7.4'
     }
@@ -17,7 +17,7 @@ buildscript {
 
         // Firebase
         classpath 'com.google.gms:google-services:4.3.3'
-        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.2.0'
+        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.3.0'
         classpath 'com.google.firebase:perf-plugin:1.3.1'
 
         classpath "io.gitlab.arturbosch.detekt:detekt-gradle-plugin:$detekt_version"