Android Firebase （FCM）推送接入-编程知识

官方文档：

向后台应用发送测试消息 | Firebase Cloud Messaging

1、根级（项目级）Gradlegradle的dependencies中添加：

    dependencies {...// Add the dependency for the Google services Gradle pluginclasspath 'com.google.gms:google-services:4.3.10'}

2、模块（应用级）Gradle 中添加 Google 服务插件：

plugins {id 'com.android.application'// Add the Google services Gradle pluginid 'com.google.gms.google-services'...
}
或者
apply {plugin 'com.android.application'// Add the Google services Gradle pluginplugin "com.google.gms.google-services"
}

添加 Firebase Cloud Messaging Android 库的依赖项：（按官方的应该也是可以的）

    implementation(platform("com.google.firebase:firebase-bom:32.3.1"))implementation("com.google.firebase:firebase-analytics-ktx")
//    implementation("com.google.firebase:firebase-auth-ktx")implementation("com.google.firebase:firebase-firestore-ktx")implementation("com.google.firebase:firebase-messaging")// Firebase Cloud Messaging (Kotlin)implementation("com.google.firebase:firebase-messaging-ktx")

3、消息接收

AndroidManifest.xml中添加，接受类

        <serviceandroid:name=".BillionFirebaseMessagingService"android:exported="true"><intent-filter><action android:name="com.google.firebase.MESSAGING_EVENT" /></intent-filter></service>


import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Build;
import android.util.Log;import androidx.annotation.NonNull;
import androidx.core.app.NotificationCompat;
import androidx.core.app.NotificationManagerCompat;
import androidx.core.content.ContextCompat;import com.game.base.sdk.BaseSDK;
import com.game.base.sdk.Events;
import com.google.firebase.messaging.FirebaseMessagingService;
import com.google.firebase.messaging.RemoteMessage;
import com.google.gson.Gson;import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;import java.util.Locale;
import java.util.Map;
import java.util.jar.JarException;
import java.lang.Boolean;import game.billion.block.blast.bbb.MainActivity;
import game.billion.block.blast.bbb.R;
import kotlin.Pair;public class BillionFirebaseMessagingService extends FirebaseMessagingService {private String channelID = "game.puzzle.block.billion.pro.notification";private String channelName = "messageName";int notifyID = 101010;//监控令牌的生成@Overridepublic void onNewToken(@NonNull String token) {super.onNewToken(token);Log.d("BillionFirebaseMessagingService", "onNewToken:"+token);}//监控推送的消息@Overridepublic void onMessageReceived(@NonNull RemoteMessage mge) {super.onMessageReceived(mge);Log.d("BillionFirebaseMessagingService", "From:"+mge.getFrom());Log.d("BillionFirebaseMessagingService", "data:"+mge.getData());Map<String,String> dt = mge.getData();String ti =dt.get("title");           //标题（多语言），JSON字符串try {if (ti != null && !ti.isEmpty()){JSONObject json =new JSONObject(ti);String language = Locale.getDefault().getLanguage();if (language=="pt"){//获取巴西语String resTitle = json.getString("pt");if (resTitle != null && !resTitle.isEmpty()){//显示通知addNotification(resTitle);}}else {String resTitle = json.getString("en");if (resTitle != null && !resTitle.isEmpty()){//显示通知addNotification(resTitle);}}}} catch (JSONException e) {}String mgeId = mge.getMessageId();String intent =dt.get("intent");String strId =dt.get("sid");Pair<String, String>[] params = new Pair[3];params[0] = new Pair<>("message_id", mgeId);params[1] = new Pair<>("type", intent);params[2] = new Pair<>("sid", strId);Events.push("100410", params);}//添加提示private  void addNotification(String resTitle ){if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.POST_NOTIFICATIONS) == PackageManager.PERMISSION_GRANTED) {NotificationManagerCompat managerCompat = NotificationManagerCompat.from(this);NotificationChannel nc=newNotificationChannel(channelID, channelName);if (nc!=null){if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {managerCompat.createNotificationChannel(nc);}}Intent nfIntent = new Intent(this, MainActivity.class);PendingIntent pendingIntent ;if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {pendingIntent=PendingIntent.getActivity(this, 0, nfIntent, PendingIntent.FLAG_IMMUTABLE);} else {pendingIntent=PendingIntent.getActivity(this, 0, nfIntent, PendingIntent.FLAG_IMMUTABLE | PendingIntent.FLAG_UPDATE_CURRENT);}NotificationCompat.Builder builder = new NotificationCompat.Builder(this, channelID);builder.setContentIntent(pendingIntent); // 设置PendingIntentbuilder.setSmallIcon(R.drawable.notification); // 设置状态栏内的小图标builder.setVisibility(NotificationCompat.VISIBILITY_PUBLIC);builder.setStyle(new NotificationCompat.BigTextStyle());builder.setContentTitle(getString(R.string.app_name));builder.setContentText(resTitle);builder.setWhen(System.currentTimeMillis());builder.setAutoCancel(true);managerCompat.notify(notifyID, builder.build());}}private NotificationChannel newNotificationChannel(String cId, String cName){if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {NotificationChannel channel =new  NotificationChannel(cId, channelName, NotificationManager.IMPORTANCE_HIGH);channel.setSound(null, null);channel.setLockscreenVisibility(Notification.VISIBILITY_PUBLIC);return channel;}return null;}
}

4、测试（google-services.json 记得放应用级中）

a、获取tokn

 //在firebase中检查google版本是否有问题GoogleApiAvailability.getInstance().makeGooglePlayServicesAvailable(this).addOnCompleteListener(new OnCompleteListener<Void>() {@Overridepublic void onComplete(@NonNull Task<Void> task) {if (task.isSuccessful()) {Log.d("Firebase", "onComplete: Play services OKAY");//firebase 推送 （FCM）获取token（FCM令牌）FirebaseMessaging.getInstance().getToken().addOnCompleteListener(new OnCompleteListener<String>() {@Overridepublic void onComplete(@NonNull Task<String> task) {if (!task.isSuccessful()){Log.w("Firebase", "Fetching FCM registration token failed", task.getException());return;}// Get new FCM registration tokenString ss= task.getResult();Log.d("Firebase", "onComplete:token getResult "+ss);}});} else {// Show the user some UI explaining that the needed version// of Play services Could not be installed and the app can't run.}}});

b、用tokn就能对固定手机发送消息