未收到 Firebase Cloud Messaging 的 Android 后台通知

我搜索了很多有关应用程序在后台或关闭时的通知的信息。顺便说一句，我正在使用 Firebase 云消息传递。这对我不起作用。我使用了 Android 设置，当应用程序位于前台或手机未锁定时，会收到通知。

• 安装后，令牌会正确打印并订阅该主题。
• 当我在应用程序运行时发送通知时活跃在前台（因此屏幕已解锁并显示应用程序）我收到通知和标题，如onMessageReceived.
• 当我在应用程序运行时发送通知时未显示但仍在最近的应用程序中并且屏幕是unlocked我收到标题和消息的通知，如中所述notification payload.
• 当我在应用程序运行时发送通知时未显示但仍在最近的应用程序中并且屏幕是locked什么也没收到。
• 当我在应用程序运行时发送通知时*关闭并从最近的应用程序中删除什么也没收到。

如何更改此设置，以便应用程序始终收到通知，即使在关闭或手机锁定时也是如此？

诗。我读到了有关受保护应用程序的 Doze 模式的信息，即使我将我的应用程序与受保护的应用程序放在一起，我也没有收到任何消息。我正在华为 P8 Lite 上进行测试。

Android清单

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.WRITE_SETTINGS"/>
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme" >
    <activity android:name=".activities.MainActivity"
        android:configChanges="orientation"
        android:screenOrientation="portrait">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <service
        android:name=".services.MyAppFirebaseMessagingService"
        android:enabled="true"
        android:exported="true">
        <intent-filter>
            <action android:name="com.google.firebase.MESSAGING_EVENT"/>
        </intent-filter>
    </service>
    <service
        android:name=".services.FirebaseIDService"
        android:enabled="true"
        android:exported="true">
        <intent-filter>
            <action android:name="com.google.firebase.INSTANCE_ID_EVENT"/>
        </intent-filter>
    </service>
    <receiver android:name=".services.NotificationReceiver" />
</application>

Gradle

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.google.firebase:firebase-core:9.2.0'
    compile 'com.google.firebase:firebase-messaging:9.2.0'
}

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

Firebase消息服务

public class MyAppFirebaseMessagingService extends FirebaseMessagingService {
    private static final String TAG = "FCM Service";

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        // TODO: Handle FCM messages here.
        // If the application is in the foreground handle both data and notification messages here.
        // Also if you intend on generating your own notifications as a result of a received FCM
        // message, here is where that should be initiated.
        Log.d(TAG, "From: " + remoteMessage.getFrom());
        Log.d(TAG, "Notification Message Body: " + remoteMessage.getNotification().getBody());

        showNotification(getApplicationContext());
    }

    public static void showNotification(Context context){
        Intent intent = new Intent(context, MainActivity.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0 /* Request code */, intent,
            PendingIntent.FLAG_ONE_SHOT);

        Uri defaultSoundUri= RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(context)
            .setSmallIcon(R.drawable.ic_launcher)
            .setContentTitle("FCM Message")
            .setContentText("FCM Body")
            .setAutoCancel(true)
            .setSound(defaultSoundUri)
            .setPriority(Notification.PRIORITY_MAX)
            .setContentIntent(pendingIntent);

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

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

FirebaseInstanceID服务

public class FirebaseIDService extends FirebaseInstanceIdService {

    private static final String TAG = "FirebaseIDService";

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

        System.out.println("Devicetoken: " + refreshedToken);

        FirebaseMessaging.getInstance().subscribeToTopic("/topics/myapp");

        // TODO: Implement this method to send any registration to your app's servers.
        sendRegistrationToServer(refreshedToken);
     }

    /**
     * Persist token to third-party servers.
     *
     * Modify this method to associate the user's FCM InstanceID token with any server-side account
     * maintained by your application.
     *
     * @param token The new token.
     */
    private void sendRegistrationToServer(String token) {
         // Add custom implementation, as needed.
    }
}

通知负载

{
    "to": "/topics/mytopic",
    "priority": "high",
    "notification": {
        "sound": "default",
        "badge": "1",
        "body": "the body text",
        "title": "title text"
     },
     "data": {
         "id": "id",
         "channel": "channel"
     }
}

编辑 - 添加 WakeFulBroadcastReceiver 的代码

public class NotificationReceiver extends WakefulBroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {

        // cancel any further alarms
        AlarmManager alarmMgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
        PendingIntent alarmIntent = PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT);
        alarmMgr.cancel(alarmIntent);
        completeWakefulIntent(intent);

        // start the GcmTaskService
        MyAppFirebaseMessagingService.showNotification(context);
    }
}

更新有效负载

如果我将我的有效负载更改为评论中建议的方式，这样它仍然无法工作。也许这与我正在测试的安装了 Android 6.0.1 的华为 P8 Lite 有关。

{
    "to": "/topics/mytopic",
    "priority": "high",
    "data": {
        "sound": "default",
        "badge": "1",
        "body": "the body text",
        "title": "title text"
    }
}

更新2.0

我已经在多个设备和版本上进行了测试。在 Android 5 的设备上，它运行良好，也无需打开应用程序和锁定屏幕。唯一无法正常工作的设备是我自己的华为 P8 Lite。仍然不明白为什么它不起作用。

当应用程序关闭时，它会关闭服务。您必须重新启动该服务。

在您的 Application 类上，实现 ActivityLifecycleCallbacks 并在 onActivityDestroyed 上通过警报重新启动服务。

public class YourApplication extends Application implements Application.ActivityLifecycleCallbacks {
    @Override
    public void onCreate() {
        super.onCreate();
        registerActivityLifecycleCallbacks(this);
    }

    @Override
    public void onActivityDestroyed(Activity activity) {
            Intent restartService = new Intent(getApplicationContext(), MyAppFirebaseMessagingService.class);
            PendingIntent pendingIntent = PendingIntent.getService(getApplicationContext(),1,restartService,PendingIntent.FLAG_ONE_SHOT);
            AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
            alarmManager.set(AlarmManager.ELAPSED_REALTIME,5000,pendingIntent);
    }
}