fcm push notification (firebase) 안드로이드 푸쉬알림 예제

Firebase Cloud Messaging을 사용해서 안드로이드 푸시 알림을 구현하는 방법

1. project level의 build.gradle 파일에 google-service를 추가

dependencies {
    classpath 'com.android.tools.build:gradle:2.1.0'
    //classpath 'com.google.gms:google-services:3.0.0'
    classpath 'com.google.gms:google-services:3.0.0'
    // NOTE: Do not place your application dependencies here; they belong
    // in the individual module build.gradle files
}

2. app level의 build.gradle 파일에 firebase-messaging을 추가하고 google-service plugin을 apply해준다.

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.4.0'

    compile 'com.google.firebase:firebase-messaging:9.0.2'

}
apply plugin: 'com.google.gms.google-services'

3. Android-manifest.xml

<service
    android:name=".FirebaseMessagingService">
    <intent-filter>
        <action android:name="com.google.firebase.MESSAGING_EVENT" />
    </intent-filter>
</service>
<service
    android:name=".FirebaseInstanceIDService" >
    <intent-filter>
        <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
    </intent-filter>
</service>

태크 안에 위의 내용을 추가해 준다.

4. FirebaseInstanceIDService.java

/**
 * Created by HKH on 2016-06-28.
 */
import android.util.Log;

import com.google.firebase.iid.FirebaseInstanceId;
import com.google.firebase.iid.FirebaseInstanceIdService;


public class FirebaseInstanceIDService extends FirebaseInstanceIdService {

    private static final String TAG = "MyFirebaseIIDService";

    // [START refresh_token]
    @Override
    public void onTokenRefresh() {
        // Get updated InstanceID token.
        String token = FirebaseInstanceId.getInstance().getToken();
        
    }

}

사용자의 기기별 token을 생성하는 클래스이다.

여기서 token이란 나중에 push 알림을 특정 타겟에게 보낼 때 사용되는 고유 키 값이다.

5. FirebaseMessagingService.java

/**
 * Created by HKH on 2016-06-28.
 */
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.PowerManager;
import android.support.v4.app.NotificationCompat;

import com.google.firebase.messaging.RemoteMessage;

import java.io.BufferedInputStream;
import java.net.URL;
import java.net.URLConnection;


public class FirebaseMessagingService extends com.google.firebase.messaging.FirebaseMessagingService {
    private static final String TAG = "FirebaseMsgService";

    // [START receive_message]
    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {

        sendPushNotification(remoteMessage.getData().get("message"));
    }

    private void sendPushNotification(String message) {
        System.out.println("received message : " + message);
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent,
                PendingIntent.FLAG_ONE_SHOT);
        
        Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.drawable.noti).setLargeIcon(BitmapFactory.decodeResource(getResources(),R.mipmap.ic_launcher) )
                .setContentTitle("Push Title ")
                .setContentText(message)
                .setAutoCancel(true)
                .setSound(defaultSoundUri).setLights(000000255,500,2000)
                .setContentIntent(pendingIntent);
        
        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        PowerManager pm = (PowerManager) this.getSystemService(Context.POWER_SERVICE);
        PowerManager.WakeLock wakelock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "TAG");
        wakelock.acquire(5000);

        notificationManager.notify(0 /* ID of notification */, notificationBuilder.build());
    }

}

푸쉬 메세지가 들어왔을 때 실제로 사용자가 푸쉬알림을 만들어서 띄워주는 클래스이다.

Api를 통해 푸쉬 알림을 전송하면 내용이 message에 담겨서 오게 된다.

6. MainActivity

import com.google.firebase.messaging.FirebaseMessaging;
onCreate 함수 안에
FirebaseMessaging.getInstance().subscribeToTopic("notice");
-> 여기서 topic은 api를 사용하여 푸시 알림 전송시 같은 토픽명 그룹 전체에 메세지를 발송 할 수 있음.

테스트는 Firebase Console의 Notification 메뉴에서 가능하다.