Friebase 사용해서 push message 보내기

AndroidManifest.xml 에 푸시 알림시 사용할 채널, 컬러, 아이콘을 메타 정보로 등록.

<meta-data
            android:name="com.google.firebase.messaging.default_notification_icon"
            android:resource="@mipmap/ic_launcher" />
        <meta-data
            android:name="com.google.firebase.messaging.default_notification_color"
            android:resource="@color/colorAccent" /> <!-- fcm default notification channel id -->
        <meta-data
            android:name="com.google.firebase.messaging.default_notification_channel_id"
            android:value="1" />

cloudMessaging 패키지 생성

 

package com.example.fcmtest.cloudmessaging;

import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Build;
import android.util.Log;

import androidx.annotation.NonNull;
import androidx.core.app.NotificationCompat;

import com.example.fcmtest.MainActivity;
import com.example.fcmtest.R;
import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;

public class MyFirebaseMessagingService extends FirebaseMessagingService {
    @Override
    public void onMessageReceived(@NonNull RemoteMessage remoteMessage) {
        // 푸시 메세지를 수신했을때 동작.
        if (remoteMessage.getData().size() > 0) {
            Log.d("jaeho", "Message data payload: " + remoteMessage.getData());

            if (false) {
                // For long-running tasks (10 seconds or more) use WorkManager.
//                Log.d("jaeho", "scheduleJob in");
                scheduleJob();
            } else {
                // Handle message within 10 seconds
                handleNow(remoteMessage);
            }

            // Check if message contains a notification payload.
            if (remoteMessage.getNotification() != null) {
                Log.d("jaeho", "Message Notification Body: "
                        + remoteMessage.getNotification().getBody());
            }
        }
    }

    private void scheduleJob() {
        Log.d("jaeho", "scheduleJob in");
    }

    private void handleNow(RemoteMessage remoteMessage) {
        Log.d("jaeho", "handleNow in");
        // 푸시 메세지를 수신 했다면 알림창 띄우기.
        sendNotification(remoteMessage.getData().get("message"));
    }

    private void sendNotification(String message) {
        Log.d("jaeho", "sendNotification");

        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        // 수신된 어플을 활성화.
        PendingIntent pendingIntent = PendingIntent.getActivity(this
                , 0 /* Request code */, intent,
                PendingIntent.FLAG_ONE_SHOT);
        // PendingIntent = 예약 인텐트, 특정 주기가 됐을때 동작

        String channelId = "1000";
        Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        //휴대폰 알림음 객체 생성

        //알림 처리
        NotificationCompat.Builder notificationBuilder =
                new NotificationCompat.Builder(this, channelId)
                        .setSmallIcon(R.mipmap.ic_launcher)
                        .setContentTitle(getString(R.string.app_name))
                        .setContentText(message)
                        .setAutoCancel(true)
                        .setSound(defaultSoundUri)
                        .setContentIntent(pendingIntent);

        //알림 관리자
        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        //안드로이드 버전별 예외 처리
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel channel = new NotificationChannel(channelId,
                    "Channel human readable title",
                    NotificationManager.IMPORTANCE_DEFAULT);
            notificationManager.createNotificationChannel(channel);
        }

        notificationManager.notify(0, notificationBuilder.build());
    }

    @Override
    public void onNewToken(@NonNull String s) {
        // 푸시 메세지 전송용 토큰 생성.
        Log.d("jaeho", "onNewToken token = " + s);
        sendRegistrationToServer(s);
    }

    private void sendRegistrationToServer(String s) {
        Log.d("jaeho", "onNewToken token = " + s);
    }
}

MyFirebaseMessagingService.java 생성

package com.example.fcmtest.cloudmessaging;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import com.example.fcmtest.R;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.installations.FirebaseInstallations;

public class CloudMessagingActivity extends AppCompatActivity
        implements View.OnClickListener{
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_cloud_messaging);
        Button tokenbtn = findViewById(R.id.tokenbtn);
        tokenbtn.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        //파이어베이스가 초기화 된 후 그 객체를 통해서 아이디 가져오기
        FirebaseInstallations.getInstance().getId()
                .addOnCompleteListener(new OnCompleteListener<String>() {
                    @Override
                    public void onComplete(@NonNull Task<String> task) {
                        if (task.isSuccessful()) {
                            Log.d("jaeho", "Installation ID: "
                                    + task.getResult()+":1202");

                        } else {
                            Log.e("jaeho", "Unable to get Installation ID");
                        }
                    }
                });
    }
}

CloudMessagingActivity.java 생성

 

파이어베이스 콘솔에서 클라우드메세징탭

결과 화면