Android 推送通知声音仅在应用程序处于前台时播放，但当应用程序处于后台时不播放声音

Question

我正在使用FCM进行推送通知以下代码在收到通知时播放声音

 public void playNotificationSound() {
        try {
            Uri notification = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
            Ringtone r = RingtoneManager.getRingtone(mContext, notification);
            r.play();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

我正在调用此OnMessageReceived方法，但声音仅在应用程序处于前台时播放，当应用程序在后台时不播放

 @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        Log.e(TAG, "From: " + remoteMessage.getFrom());
        if (remoteMessage == null)
            return;
        // Check if message contains a notification payload.
        if (remoteMessage.getNotification() != null) {
            Log.e(TAG, "Notification Body: " + remoteMessage.getNotification().getBody());
            handleNotification(remoteMessage.getNotification().getBody());
        }
        // Check if message contains a data payload.
        if (remoteMessage.getData().size() > 0) {
            Log.e(TAG, "Data Payload: " + remoteMessage.getData().toString());
            try {
                JSONObject json = new JSONObject(remoteMessage.getData().toString());
                handleDataMessage(json);
            } catch (Exception e) {
                Log.e(TAG, "Exception: " + e.getMessage());
            }
        }
    }


 private void handleNotification(String message) {
        if (!NotificationUtils.isAppIsInBackground(getApplicationContext())) {
            // app is in foreground, broadcast the push message
            Intent pushNotification = new Intent(config.PUSH_NOTIFICATION);
            pushNotification.putExtra("message", message);
            LocalBroadcastManager.getInstance(this).sendBroadcast(pushNotification);
            // play notification sound
            NotificationUtils notificationUtils = new NotificationUtils(getApplicationContext());
            notificationUtils.playNotificationSound();
        }else if (NotificationUtils.isAppIsInBackground(getApplicationContext())){
            // If the app is in background, firebase itself handles the notification
            NotificationUtils notificationUtils = new NotificationUtils(getApplicationContext());
            notificationUtils.playNotificationSound();
        }
    }

Answer 1

由于发送通知对象时不调用onMessageReceived()，因此我创建了一个 BroadcastReceiver 来在通知到达时处理它：

public class NotificationReceiver extends WakefulBroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
    playNotificationSound(context);
}
public void playNotificationSound(Context context) {
    try {
        Uri notification = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        Ringtone r = RingtoneManager.getRingtone(context, notification);
        r.play();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

并将其添加到清单中。接收器负责播放通知铃声。

 <receiver
        android:name=".notification.NotificationReceiver"
        android:exported="true"
        android:permission="com.google.android.c2dm.permission.SEND" >
        <intent-filter>
            <action android:name="com.google.android.c2dm.intent.RECEIVE" />
        </intent-filter>
 </receiver>

Answer 2

通过 Firebase 控制台在 Android 中发送通知时，系统会将其视为通知消息。当应用程序处于后台时，Android 设备（系统托盘）将始终自动处理通知消息（请参阅处理消息）。

这意味着不会调用onMessageReceived()。因此，如果您打算在收到通知时始终播放声音，则必须改用数据消息*。但是，您必须在不使用Firebase控制台的情况下发送消息。

Answer 3

您需要在 Firebase 通知编辑器中的高级设置下启用声音。 :)

Answer 4

private void sendNotification(String messageBody, Intent intent) {
        //intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent/*.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)*/,
                PendingIntent.FLAG_ONE_SHOT);
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
        builder.setContentIntent(pendingIntent);
        Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);//<--
        Bitmap bitmap = getBitmapfromUrl(postImageUrl);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.drawable.notification_recive)

                .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.notification_recive))
                .setContentTitle(postTitle + "")
                .setStyle(new NotificationCompat.BigPictureStyle()
                        .setSummaryText(postTitle + "")
                        .bigPicture(bitmap))
                .setContentText(messageBody)
                .setLights(getResources().getColor(R.color.blue),1000,1500)
                .setAutoCancel(true)
                .setSound(defaultSoundUri)//<--
                .setContentIntent(pendingIntent);

        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(0 /* ID of notification */, notificationBuilder.build());
    }

>

您需要使用元数据将默认通道设置到您的Manifest.xml中，如下所示：

<meta-data
     android:name="com.google.firebase.messaging.default_notification_channel_id"
     android:value="NAME_OF_YOUR_DEFAULT_CHANNEL" />

Answer 5

你已经有方法在消息接收，firebase 在应用程序处于后台时发送 remoteMessage.getData（） 类型。和 remoteMessage.getNotification（） 将为空。因此，声音仅在应用程序处于前台时播放，而不是在应用程序在后台播放。您需要添加

if (remoteMessage.getData().size() > 0) {
        Log.e(TAG, "Data Payload: " + remoteMessage.getData().toString());
        try {
            JSONObject json = new JSONObject(remoteMessage.getData().toString()); 
            handleNotification(json.getString("msg");//I am assuming message key is msg
            handleDataMessage(json);
        } catch (Exception e) {
            Log.e(TAG, "Exception: " + e.getMessage());
        }
    }