问题：

Firebase云消息传递Android项目不发送推送通知

狄心水

2023-03-14

我正在尝试开发一个应用程序，其中服务器必须每5秒向运行该应用程序的所有android设备发送通知。我决定使用（谷歌）Firebse云消息发送通知，所以我首先尝试了指南的示例项目

https://firebase.google.com/docs/notifications/android/console-audience

但我不能让它工作。我遵守了所有的指示。我已经发布了我使用的代码。我也做了档案--

当我打开Firebase控制台并发送通知时，我会在日志中看到刷新的令牌（从MyFirebaseInstancedService类，方法onTokenRefresh（）），但当我再次运行它，并通过复制和粘贴令牌向单个设备发送通知时，不会发生任何事情。另外，当我从控制台向用户段发送通知时，不会再发生任何事情。

我还在同一个网站上为Firebase尝试了相应的ios示例项目，它在iphone上运行良好（所有通知都已发送）。我是否遗漏了什么？

public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService {

private static final String TAG = "MyFirebaseIIDService";

@Override
public void onTokenRefresh() {
    // Get updated InstanceID token.
    String refreshedToken = FirebaseInstanceId.getInstance().getToken();
    Log.d(TAG, "Refreshed token: " + refreshedToken);

    sendRegistrationToServer(refreshedToken);
}

private void sendRegistrationToServer(String token) {
    // TODO: Implement this method to send token to your app server.
}
}

MyFirebaseMessagingService：

public class MyFirebaseMessagingService extends FirebaseMessagingService {

private static final String TAG = "MyFirebaseMsgService";

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {

    Log.d(TAG, "From: " + remoteMessage.getFrom());

    //Toast.makeText(getApplicationContext(),"FROM "+remoteMessage.getFrom(),Toast.LENGTH_LONG).show();
    // Check if message contains a data payload.
    if (remoteMessage.getData().size() > 0) {
        Log.d(TAG, "Message data payload: " + remoteMessage.getData());
        //Toast.makeText(getApplicationContext(),"MESSAGE: "+remoteMessage.getData(),Toast.LENGTH_LONG).show();
    }

    // Check if message contains a notification payload.
    if (remoteMessage.getNotification() != null) {
        //MainActivity.TestMethod();
        Log.d(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody());
        //Toast.makeText(getApplicationContext(),"MESSAGE: "+remoteMessage.getData(),Toast.LENGTH_LONG).show();
    }

    // Also if you intend on generating your own notifications as a result of a received FCM
    // message, here is where that should be initiated. See sendNotification method below.
 sendNotification(remoteMessage.getNotification().getBody());
}

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 /* Request code */, intent,
            PendingIntent.FLAG_ONE_SHOT);

    Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
            .setSmallIcon(R.drawable.ic_stat_ic_notification)
            .setContentTitle("FCM Message")
            .setContentText(messageBody)
            .setAutoCancel(true)
            .setSound(defaultSoundUri)
            .setContentIntent(pendingIntent);

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

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

主要活动：

public class MainActivity extends AppCompatActivity {

private static final String TAG = "MainActivity";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    if (getIntent().getExtras() != null) {
        for (String key : getIntent().getExtras().keySet()) {
            String value = getIntent().getExtras().getString(key);
            Log.d(TAG, "Key: " + key + " Value: " + value);
        }
    }

    Button subscribeButton = (Button) findViewById(R.id.subscribeButton);
    subscribeButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // [START subscribe_topics]
            FirebaseMessaging.getInstance().subscribeToTopic("news");
            // [END subscribe_topics]

            // Log and toast
            String msg = getString(R.string.msg_subscribed);
            Log.d(TAG, msg);
            Toast.makeText(MainActivity.this, msg, Toast.LENGTH_SHORT).show();
        }
    });

    Button logTokenButton = (Button) findViewById(R.id.logTokenButton);
    logTokenButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // Get token
            String token = FirebaseInstanceId.getInstance().getToken();

            // Log and toast
            String msg = getString(R.string.msg_token_fmt, token);
            Log.d(TAG, msg);
            Toast.makeText(MainActivity.this, msg, Toast.LENGTH_SHORT).show();
        }
    });
}
}

以及build.gradle（项目消息传递）：

    // Top-level build file where you can add configuration options commonto             `all sub-projects/modules.`

buildscript {
    repositories {
        jcenter()
        mavenLocal()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.3'
        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
    }
}

allprojects {
    repositories {
        jcenter()
        mavenLocal()
    }
}

以及build.gradle（模块应用程序）：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 24
    buildToolsVersion "24.0.0"

    defaultConfig {
        applicationId "com.google.firebase.quickstart.fcm"
        minSdkVersion 15
        targetSdkVersion 24
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    packagingOptions {
        exclude 'LICENSE.txt'
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])

    // Testing dependencies
    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.1'
    androidTestCompile 'com.android.support.test:runner:0.2'
    androidTestCompile 'com.android.support:support-annotations:24.2.0'
    compile 'com.android.support:appcompat-v7:24.2.0'
    compile 'com.google.firebase:firebase-messaging:9.4.0'
    compile 'com.google.firebase:firebase-core:9.4.0'
    compile 'com.google.android.gms:play-services-gcm:9.4.0'
    compile 'com.android.support:design:24.2.0'
}

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

...这是清单文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.google.firebase.quickstart.fcm">

    <uses-permission android:name="android.permission.INTERNET"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme">
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <!-- [START firebase_service] -->
        <service android:name=".MyFirebaseMessagingService">
            <intent-filter>
                <action android:name="com.google.firebase.MESSAGING_EVENT" />
            </intent-filter>
        </service>
        <!-- [END firebase_service] -->
        <!-- [START firebase_iid_service] -->
        <service android:name=".MyFirebaseInstanceIDService">
            <intent-filter>
                <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
            </intent-filter>
        </service>
        <!-- [END firebase_iid_service] -->
        <activity
            android:name=".ResultActivity"
            android:label="@string/title_activity_result"
            android:theme="@style/AppTheme.NoActionBar"></activity>
    </application>

</manifest>

万俟玉书

2023-03-14

当应用程序处于前台时，您可能正在尝试获取通知。请确保它位于后台，然后重试。否则，当应用程序处于前台时，您需要按照此过程获取通知。

来自Firebase文档：https://firebase.google.com/docs/cloud-messaging/android/receive

Firebase通知的行为因接收应用的前台/后台状态而异。如果希望前台应用程序接收通知消息或数据消息，则需要编写代码来处理onMessageRec的回调。

发送通知消息：https://firebase.google.com/docs/cloud-messaging/android/first-message

发送通知消息

在目标设备上安装并运行应用程序。
确保应用程序在设备的后台。
打开Firebase控制台的通知选项卡，然后选择新建消息。
输入消息文本。
选择单个设备作为消息目标。
在标有FCM注册令牌的字段中，输入您在本指南前一节中获得的注册令牌。

Firebase云消息传递Android项目不发送推送通知

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