?? ??? ??? ?? ??? ?? ? ??? ??? ??? ?? ????? ?? ??? ???? ??? ???? ???? ?????. ??? Android??? ? ??? ???? Android ?? ???? ??? ??? ?? FCM(Firebase Cloud Messaging) ?? ???? ?? ??? ?? ? ????. ?? ????? ?? ??? ???? ???? ?? ?? ???? ?? ???? ?? ??? ???? ? ??? ???.

Firebase ???? ???(FCM)? ??? ?? ??? ??? ??? ????? ??? ???? ??? ??? ? ?????. iOS, ? ? Android ???? ?? FCM?? ?????. FCM ?? ??? ???? ??? ????? ?? 4kb? ???? ?? ? ????.

? ????? ?? ??? Android ?? ???? ??? ???? ???? ??? ??? ??? ?? ?????. ?? ??? ??? ????? ???? ? ?? ?? ??? ??? ??? ?????.

Android ?? ?? ??

??? ?? ??? ??? ??, ?? ?? ? ??????? ???? ??? ??? ???? ? ??? ???. ?? ??? ???? ???? ??? ???? ???? ??? ?? ???? ?? ?? ? ????.

?? ??? ??? ???? Android ??? ??? ?? ??? ???? ??? ? ????.

i) ???? ??? ?? ?? ?? ?? ????

ii) ???? ??? ??? ??? ?? ??? ????? ?????.

iii) ????? ??? ?? ??? ??? ??? ??? ????.

iv) ?? ??? ???? ?? ???? ???? ????? ??? ??, ???? ? ??? ?????.

v) ??? ???? ?? ???? ??? ? ??? ??? ??? ???? ?? ???? ? ?? ??? ?? ??? ?????.

Android ??????? ?? ?? ?? ??

?? ??

Android ? FCM?? ?? ??? ????? ????? ?? ??? ???? ?????.

i) Android Studio – Android ??? ???? IDE???.

ii) ?? ?? ? ?? – Android ???? ?? ? ??, ????? ?? ??? ?? ???? ??? ?????.

iii) Firebase ?? – ???? ??? ???? ????? Firebase ??? ??? ???.

iv) ??? ??? – ?? ??? ? Firebase ???? ??? ??? ?????.

1??. Firebase ???? ??

Firebase ??? ?????.

??? ???? ??? ???? ????? ????.

?? ??? ?? Google Analytics ???? ??? ?? ?????? ?? ?? ??? ??? ?? ? ????.

??? ????? ???? ??? ???? ???. ??? ????? ?? ? ????.

????? ??? ? ?? ?? ??? ?? ?? ???? ??? ???? ???.

???? ????? ? ??

Android ?? ????? ?????? Android ???? ???? ???. ???? Android ??? ??? ?????. ? ??? ??? ????? ??? ??(?: com.app.demoapp)? ???? ???.

???? ?? ???? ?? ?? ???? ??? ?? ????.

?? SHA-1 ?? ?????. ????? SHA-1 ?? ????? ?? ??? ???? ???. ?? SHA-1 ?? ???? Firebase ??? ??????.

./gradlew signingReport

????? '? ??'? ???? ??? ?????.

Google ??? ??

? ??? ???? google-services.json ??? ?????? ???? ??? ? ????.

?? Android ????? google-services.json? ???? Android ????? ? ????? ??? ???? ???.

MyApp/
├── app/
│ ├── src/
│ ├── build.gradle
│ ├── google-services.json
├── build.gradle
├── settings.gradle

Firebase SDK ??

???? ????? Firebase SDK? ???? build.gradle?? Google ??? ??? ??? ?????.

buildscript {
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        // Add this line
        classpath 'com.google.gms:google-services:4.3.10'
    }
}

app/build.gradle?? ?? ???? ?????.-

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'

android {
    // ...
}

dependencies {
    // Add these lines
    implementation platform('com.google.firebase:firebase-bom:29.0.4')
    implementation 'com.google.firebase:firebase-analytics'
    implementation 'com.google.firebase:firebase-messaging'
}

? ??? ?? ? Android Studio?? '?? ???'? ???? ????? Firebase? ???? ? ????.

2??. Android ???? ??

???? ?? build.gradle

???? ?? build.gradle ??: Android ????? ?? ????? ???? build.gradle ??? ????.

google() ? mavenCentral() ???? ??? ??? ???? ??? ?????.

buildscript {
    repositories {
        // Check that you have these lines
        google()
        mavenCentral()
    }
    dependencies {
        // Add this line
        classpath 'com.google.gms:google-services:4.3.10'
    }
}

allprojects {
    repositories {
        // Check that you have these lines
        google()
        mavenCentral()
    }
}

build.gradle? ?????.

???? ? ?????? build.gradle ??? ?? ?? ?? ?? ?? google-services ????? ???? ??? ??? Firebase ? Firebase ??? ???? ?????.

./gradlew signingReport

? ??? ???? ?? ??? ?? Firebase ???? ???? ????? Firebase ????? ?????. ?? Firebase ??? ??? ?? ? ? ?? ??? ???????.

3??. FCM ??

FCM ???? ???? ??? ??

FirebaseMessagingService? ???? MyMessagingService?? ? ???? ????.

?? ????? ??? ?? ? ???? ???? ????? onMessageReceived ???? ????? ???. ?? ?? ??? ???? ????? ????? ???? ??? ?????.

MyApp/
├── app/
│ ├── src/
│ ├── build.gradle
│ ├── google-services.json
├── build.gradle
├── settings.gradle

AndroidManifest.xml ??? ??

?????? AndroidManifest.xml ??? ???.

?? FCM ???? ????? ?????? MyMessagingService? ???? ???.

buildscript {
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        // Add this line
        classpath 'com.google.gms:google-services:4.3.10'
    }
}

4??: FCM ?? ?? ??

?? ??? ???? ?? FCM ?? ??? ??? ???. ? ??? ??? ? ????? ???? ?????.

?? ??? ???? ?? ?

FirebaseMessagingService ?? ?? ?? ??? ???? FCM ?? ??? ??? ? ????. FirebaseMessagingService?? ?? ???? ??? ???????.

MyMessagingService ????:

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'

android {
    // ...
}

dependencies {
    // Add these lines
    implementation platform('com.google.firebase:firebase-bom:29.0.4')
    implementation 'com.google.firebase:firebase-analytics'
    implementation 'com.google.firebase:firebase-messaging'
}

???? ???? ??? ??? ??? ?? ????? ??? ? ????.

buildscript {
    repositories {
        // Check that you have these lines
        google()
        mavenCentral()
    }
    dependencies {
        // Add this line
        classpath 'com.google.gms:google-services:4.3.10'
    }
}

allprojects {
    repositories {
        // Check that you have these lines
        google()
        mavenCentral()
    }
}

??? ??? ???? Android ??? FCM ?? ??? ?? ? ????. ??? FirebaseMessagingService? ?? ?? ???? ??? ? ????. ? ??? ?? ??? ?? ?? ??? ??? ? ?????.

5??: ?? ?? ???

???? ??? ???? FCM API? POST ??? ?? ???.

?? ?? ?????

• Firebase ?? → ???? ?? → '???? ??' → '???? ???'??.
• “???? ?? ??”?? ?? ?? ?? ? ????.

cURL ??: ? cURL ??? ??? ??? ? ?????. ?? ?? ?? ?? ??? FCM ????.

./gradlew signingReport

• https://fcm.googleapis.com/fcm/send API ?????
• H "Authorization: key=": ?? ?? ??? ?? ?????.
• H "Content-Type: application/json": ??? ?? ??.
• d '{ ... }': ??? ???? ??? JSON ???????.

?? ??

??? ??? ??

??? ???? ??? ?? ?-? ?? ??? ? ?? ??? ???? ?? ???? ??? ?????. ?? ?????? ???, ?????? ???? ???? FirebaseMessagingService ? onMessageReceived ???? ?? ??? ???? ?????.

??? ??? ??? ?

MyMessagingService ????

MyApp/
├── app/
│ ├── src/
│ ├── build.gradle
│ ├── google-services.json
├── build.gradle
├── settings.gradle

?? ?? ??

Android 8.0(API ?? 26)??? ?? ??? ??? ???? ???. ?? ?? ???? ? ??? ?? ??? ??? ? ????.

?? ?? ?? ?

?? ?? ?? ?? ???:

buildscript {
    repositories {
        google()
        mavenCentral()
    }
    dependencies {
        // Add this line
        classpath 'com.google.gms:google-services:4.3.10'
    }
}

MainActivity ?? ?????? ????? ? ???? ?????.

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'

android {
    // ...
}

dependencies {
    // Add these lines
    implementation platform('com.google.firebase:firebase-bom:29.0.4')
    implementation 'com.google.firebase:firebase-analytics'
    implementation 'com.google.firebase:firebase-messaging'
}

?? NotificationUtils.createNotificationChannel(this)? ??? ?? ????. ?????? ???? ?? ??:

buildscript {
    repositories {
        // Check that you have these lines
        google()
        mavenCentral()
    }
    dependencies {
        // Add this line
        classpath 'com.google.gms:google-services:4.3.10'
    }
}

allprojects {
    repositories {
        // Check that you have these lines
        google()
        mavenCentral()
    }
}

?? ID? ????? ?? ?? ????:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 33
    defaultConfig {
        applicationId "com.example.myandroidapp"
        minSdkVersion 21
        targetSdkVersion 33
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation 'androidx.appcompat:appcompat:1.6.1'
    implementation 'com.google.android.material:material:1.8.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'

    // Add Firebase BOM
    implementation platform('com.google.firebase:firebase-bom:29.0.4')
    // Add Firebase Messaging dependency
    implementation 'com.google.firebase:firebase-messaging'
}

// Add this line at the bottom of the file
apply plugin: 'com.google.gms.google-services'

?? ?? ???

?? ??? ???? ???? ?????? ????? ???.

Android Studio??? logcat? ?? ?? > ?? ? > ???.

FirebaseMessagingService ????? ??? ??? ???? logcat ??? ???? ?? ????. ??????? ???? ?? ?????? ?? ???? ??? ???.

??? ???? ??? ?? logcat?? ???? ? ? ????.

import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import androidx.core.app.NotificationCompat;
import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;

public class MyMessagingService extends FirebaseMessagingService {

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        // Handle the received message
        if (remoteMessage.getNotification() != null) {
            // Get the message body
            String messageBody = remoteMessage.getNotification().getBody();
            // Send a notification
            sendNotification(messageBody);
        }
    }

    private void sendNotification(String messageBody) {
        Intent intent = new Intent(this, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, PendingIntent.FLAG_ONE_SHOT);

        String channelId = getString(R.string.default_notification_channel_id);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, channelId)
                .setSmallIcon(R.drawable.ic_notification)
                .setContentTitle(getString(R.string.app_name))
                .setContentText(messageBody)
                .setAutoCancel(true)
                .setContentIntent(pendingIntent);

        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

        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());
    }
}

??? ???? ??? ?? ? ? ????.

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.myandroidapp">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">

        <!-- Add this service -->
        <service
            android:name=".MyMessagingService"
            android:exported="false">
            <intent-filter>
                <action android:name="com.google.firebase.MESSAGING_EVENT" />
            </intent-filter>
        </service>

        <!-- Other activities and services -->
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

??

? ????? ?? ??? ??? ?? ??? ?? ??? ?? ??????. Firebase ???? ????? ???? ??? Firebase ???? ???? ?? ??? ???? Android ????? Android ??? ??? ??? ?????.

Firebase ????? ???? google-services.json ??? ?????? ???? ???. ?? ?? ? ?? ?? ????? ???? Firebase ???? ????? build.gradle ??? ???? ???.

?? ?? ?? ???? ??? ???? ???? ? ??? ???? AndroidManifest.xml? ???? ???. ????? ??? ???? ??? ? ?? ???? ???? ? ???? FCM ??? ???? ?? ??? ??? ??? ? ????.

Firebase ???? ???? ??? Android Studio? logcat? ???? ??? ?????? ??? ???? ? ????. ?? ? ??? ?????? Firebase ?? ? ? ??? FCM ??? ?? cURL ??? ?????.

?? Android ???? ???? ????? 'FirebaseMessagingService'?? ??? ???? ???? ??? ??? ?? ?? ??? ???? ???.

?? ????? ??? ??? ???? ??? ???? ???? ?? ? ?? ?? ??? ??? ??? ???? ? ?? ?????.

??? ??? ??? ??? ?? Firebase ? Android SDK ??? ?????. ??? ????? ??????? ?? ??? ???? ?? ??? ??? ?? ?? ??? ?????.

? ??? Android ?? ?? ??? ???? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!