Android 类似电话（oppo）的fcm通知声音响起，但通知不可见

该应用程序在许多设备上运行良好，但当我在oppo手机上测试它时，只有声音发出，通知并没有显示出来

public class MyFirebaseMessagingService extends FirebaseMessagingService {
private static final String TAG = MyFirebaseMessagingService.class.getSimpleName();

private NotificationUtils notificationUtils;

@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 the app is in background, firebase itself handles the notification
    }
}

private void handleDataMessage(JSONObject json) {
    Log.e(TAG, "push json: " + json.toString());

    try {
        JSONObject data = json.getJSONObject("data");

        String title = data.getString("title");
        String message = data.getString("message");
        boolean isBackground = data.getBoolean("is_background");
        String imageUrl = data.getString("image");
        String timestamp = data.getString("timestamp");
        String names = data.getString("names");
        String id = data.getString("id");
        String purpose = data.getString("purpose");
        JSONObject payload = data.getJSONObject("payload");

        Log.e(TAG, "title: " + title);
        Log.e(TAG, "message: " + message);
        Log.e(TAG, "isBackground: " + isBackground);
        Log.e(TAG, "payload: " + payload.toString());
        Log.e(TAG, "imageUrl: " + imageUrl);
        Log.e(TAG, "timestamp: " + timestamp);


        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 {
            // app is in background, show the notification in notification tray
            Intent resultIntent = new Intent(getApplicationContext(), FlatUserNotification.class);
            resultIntent.putExtra("message", message);
            resultIntent.putExtra("names", names);
            resultIntent.putExtra("id", id);
            resultIntent.putExtra("purpose", purpose);

            // check for image attachment
            if (TextUtils.isEmpty(imageUrl)) {
                showNotificationMessage(getApplicationContext(), title, message, timestamp, resultIntent);
            } else {
                // image is present, show notification with image
                showNotificationMessageWithBigImage(getApplicationContext(), title, message, timestamp, resultIntent, imageUrl);
            }
        }
    } catch (JSONException e) {
        Log.e(TAG, "Json Exception: " + e.getMessage());
    } catch (Exception e) {
        Log.e(TAG, "Exception: " + e.getMessage());
    }
}

/**
 * Showing notification with text only
 */
private void showNotificationMessage(Context context, String title, String message, String timeStamp, Intent intent) {
    notificationUtils = new NotificationUtils(context);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
    notificationUtils.showNotificationMessage(title, message, timeStamp, intent);
}

/**
 * Showing notification with text and image
 */
private void showNotificationMessageWithBigImage(Context context, String title, String message, String timeStamp, Intent intent, String imageUrl) {
    notificationUtils = new NotificationUtils(context);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
    notificationUtils.showNotificationMessage(title, message, timeStamp, intent, imageUrl);
}

}

通知事项：

class NotificationUtils {

private static String TAG = NotificationUtils.class.getSimpleName();

private Context mContext;

public NotificationUtils(Context mContext) {
    this.mContext = mContext;
}

public void showNotificationMessage(String title, String message, String timeStamp, Intent intent) {
    showNotificationMessage(title, message, timeStamp, intent, null);
}

public void showNotificationMessage(final String title, final String message, final String timeStamp, Intent intent, String imageUrl) {
    // Check for empty push message
    if (TextUtils.isEmpty(message))
        return;


    // notification icon
    final int icon = R.drawable.noti;

    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
    final PendingIntent resultPendingIntent =
            PendingIntent.getActivity(
                    mContext,
                    0,
                    intent,
                    PendingIntent.FLAG_CANCEL_CURRENT
            );

    final NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
            mContext);

    final Uri alarmSound = Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE
            + "://" + mContext.getPackageName() + "/raw/notification");

    if (!TextUtils.isEmpty(imageUrl)) {

        if (imageUrl != null && imageUrl.length() > 4 && Patterns.WEB_URL.matcher(imageUrl).matches()) {

            Bitmap bitmap = getBitmapFromURL(imageUrl);

            if (bitmap != null) {
                showBigNotification(bitmap, mBuilder, icon, title, message, timeStamp, resultPendingIntent, alarmSound);
            } else {
                showSmallNotification(mBuilder, icon, title, message, timeStamp, resultPendingIntent, alarmSound);
            }
        }
    } else {
        showSmallNotification(mBuilder, icon, title, message, timeStamp, resultPendingIntent, alarmSound);
        playNotificationSound();
    }
}


private void showSmallNotification(NotificationCompat.Builder mBuilder, int icon, String title, String message, String timeStamp, PendingIntent resultPendingIntent, Uri alarmSound) {

    NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();

    inboxStyle.addLine(message);

    Notification notification;
    notification = mBuilder.setSmallIcon(icon).setTicker(title).setWhen(0)
            .setAutoCancel(true)
            .setContentTitle(title)
            .setContentIntent(resultPendingIntent)
            .setSound(alarmSound)
            .setStyle(inboxStyle)
            .setWhen(getTimeMilliSec(timeStamp))
            .setSmallIcon(R.drawable.noti)
            .setLargeIcon(BitmapFactory.decodeResource(mContext.getResources(), icon))
            .setContentText(message)
            .build();

    NotificationManager notificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
    notificationManager.notify(Config.NOTIFICATION_ID, notification);
}

private void showBigNotification(Bitmap bitmap, NotificationCompat.Builder mBuilder, int icon, String title, String message, String timeStamp, PendingIntent resultPendingIntent, Uri alarmSound) {
    NotificationCompat.BigPictureStyle bigPictureStyle = new NotificationCompat.BigPictureStyle();
    bigPictureStyle.setBigContentTitle(title);
    bigPictureStyle.setSummaryText(Html.fromHtml(message).toString());
    bigPictureStyle.bigPicture(bitmap);
    Notification notification;
    notification = mBuilder.setSmallIcon(icon).setTicker(title).setWhen(0)
            .setAutoCancel(true)
            .setContentTitle(title)
            .setContentIntent(resultPendingIntent)
            .setSound(alarmSound)
            .setStyle(bigPictureStyle)
            .setWhen(getTimeMilliSec(timeStamp))
            .setSmallIcon(R.drawable.noti)
            .setLargeIcon(BitmapFactory.decodeResource(mContext.getResources(), icon))
            .setContentText(message)
            .build();

    NotificationManager notificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
    notificationManager.notify(Config.NOTIFICATION_ID_BIG_IMAGE, notification);
}

/**
 * Downloading push notification image before displaying it in
 * the notification tray
 */
public Bitmap getBitmapFromURL(String strURL) {
    try {
        URL url = new URL(strURL);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true);
        connection.connect();
        InputStream input = connection.getInputStream();
        Bitmap myBitmap = BitmapFactory.decodeStream(input);
        return myBitmap;
    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
}

// Playing notification sound
public void playNotificationSound() {
    try {
        Uri alarmSound = Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE
                + "://" + mContext.getPackageName() + "/raw/notification");
        Ringtone r = RingtoneManager.getRingtone(mContext, alarmSound);
        r.play();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

/**
 * Method checks if the app is in background or not
 */
public static boolean isAppIsInBackground(Context context) {
    boolean isInBackground = true;
    ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT_WATCH) {
        List<ActivityManager.RunningAppProcessInfo> runningProcesses = am.getRunningAppProcesses();
        for (ActivityManager.RunningAppProcessInfo processInfo : runningProcesses) {
            if (processInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
                for (String activeProcess : processInfo.pkgList) {
                    if (activeProcess.equals(context.getPackageName())) {
                        isInBackground = false;
                    }
                }
            }
        }
    } else {
        List<ActivityManager.RunningTaskInfo> taskInfo = am.getRunningTasks(1);
        ComponentName componentInfo = taskInfo.get(0).topActivity;
        if (componentInfo.getPackageName().equals(context.getPackageName())) {
            isInBackground = false;
        }
    }

    return isInBackground;
}

// Clears notification tray messages
public static void clearNotifications(Context context) {
    NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    notificationManager.cancelAll();
}

public static long getTimeMilliSec(String timeStamp) {
    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    try {
        Date date = format.parse(timeStamp);
        return date.getTime();
    } catch (ParseException e) {
        e.printStackTrace();
    }
    return 0;
}

类通知utils{
私有静态字符串标记=NotificationUtils.class.getSimpleName（）；
私有上下文；
公共通知UTILS（上下文mContext）{
this.mContext=mContext；
}
public void showNotificationMessage（字符串标题、字符串消息、字符串时间戳、意图）{
showNotificationMessage（标题、消息、时间戳、意图、空）；
}
public void showNotificationMessage（最终字符串标题、最终字符串消息、最终字符串时间戳、意图、字符串图像URL）{
//检查空推送消息
if（TextUtils.isEmpty（message））
回来
//通知图标
最终int图标=R.drawable.noti；
intent.setFlags（intent.FLAG_ACTIVITY_CLEAR_TOP | intent.FLAG_ACTIVITY_SINGLE_TOP）；
最终挂起内容结果挂起内容=
pendingent.getActivity(
McContext，
0,
意图
PendingEvent.FLAG_取消_当前
);
最终NotificationCompat.Builder mBuilder=新NotificationCompat.Builder(
mContext）；
最终Uri alarmSound=Uri.parse（ContentResolver.SCHEME\u ANDROID\u资源
+“：/”+mContext.getPackageName（）+“/raw/notification”）；
如果（！TextUtils.isEmpty（imageUrl））{
if（imageUrl！=null&&imageUrl.length（）>4&&Patterns.WEB\u URL.matcher（imageUrl.matches（））{
位图位图=getBitmapFromURL（imageUrl）；
if（位图！=null）{
showBigNotification（位图、mBuilder、图标、标题、消息、时间戳、结果结束内容、alarmSound）；
}否则{
showSmallNotification（mBuilder、图标、标题、消息、时间戳、ResultPendingContent、alarmSound）；
}
}
}否则{
showSmallNotification（mBuilder、图标、标题、消息、时间戳、ResultPendingContent、alarmSound）；
播放通知声音（）；
}
}
私有void showSmallNotification（NotificationCompat.Builder mBuilder、int图标、字符串标题、字符串消息、字符串时间戳、PendingEvent ResultPendingEvent、Uri alarmSound）{
NotificationCompat.InboxStyle InboxStyle=新NotificationCompat.InboxStyle（）；
inboxStyle.addLine（消息）；
通知；
通知=mBuilder.setSmallIcon（icon）.setTicker（title）.setWhen（0）
.setAutoCancel（真）
.setContentTitle（标题）
.setContentIntent（结果结束内容）
.setSound（警报声）
.setStyle（收件箱样式）
.setWhen（GetTimeMillissec（时间戳））
.setSmallIcon（右可绘制非i）
.setLargeIcon（位图工厂.decodeResource（mContext.getResources（），图标））
.setContentText（消息）
.build（）；
NotificationManager NotificationManager=（NotificationManager）mContext.getSystemService（Context.NOTIFICATION\u服务）；
notificationManager.notify（Config.NOTIFICATION\u ID，NOTIFICATION）；
}
私有void showBigNotification（位图位图、NotificationCompat.Builder mBuilder、int图标、字符串标题、字符串消息、字符串时间戳、PendingEvent ResultPendingEvent、Uri alarmSound）{
NotificationCompat.BigPictureStyle BigPictureStyle=新NotificationCompat.BigPictureStyle（）；
bigPictureStyle.setBigContentTitle（标题）；
bigPictureStyle.setSummaryText（Html.fromHtml（message.toString（））；
bigPictureStyle.bigPicture（位图）；
通知；
通知=mBuilder.setSmallIcon（icon）.setTicker（title）.setWhen（0）
.setAutoCancel（真）
.setContentTitle（标题）
.setContentIntent（结果结束内容）
.setSound（警报声）
.setStyle（大图片样式）
.setWhen（GetTimeMillissec（时间戳））
.setSmallIcon（右可绘制非i）
.setLargeIcon（位图工厂.decodeResource（mContext.getResources（），图标））
.setContentText（消息）
.build（）；
NotificationManager NotificationManager=（NotificationManager）mContext.getSystemService（Context.NOTIFICATION\u服务）；
notificationManager.notify（Config.NOTIFICATION\u ID\u BIG\u IMAGE，NOTIFICATION）；
}
/**
*在中显示推送通知图像之前下载该图像
*通知盘
*/
公共位图getBitmapFromURL（字符串strURL）{
试一试{
URL=新URL（strURL）；
HttpURLConnection connection=（HttpURLConnection）url.openConnection（）；
connection.setDoInput（true）；
connection.connect（）；
InputStream输入=连接。getInputStream（）；
位图myBitmap=BitmapFactory.decodeStream（输入）；
返回我的位图；
}捕获（IOE异常）{
e、 printStackTrace（）；
返回null；
}
}
//播放通知音
公共无效播放通知声音（）{
试一试{
Uri alarmSound=Uri.parse（ContentResolver.SCHEME\u ANDROID\u资源
+“：/”+mContext.getPackageName（）+“/raw/notification”）；
Ringtone r=RingtoneManager.getRingtone（mContext，alarmSound）；
r、 play（）；
}捕获（例外e）{
e、 printStackTrace（）；
}
}
/**
*方法检查应用程序是否在后台
*/
公共静态布尔值isAppIsInBackground（上下文）{
布尔值isInBackground=true；
ActivityManager am=（ActivityManager）context.getSystemService（context.ACTIVITY_服务）；
if（Build.VERSION.SDK\u INT>Build.VERSION\u code.KITKAT\u WATCH）{
List runningprocesss=am.getrunningappprocesss（）；
对于（ActivityManager.RunningAppProcessInfo processInfo:RunningProcesss）{
if（processInfo.importance==ActivityManager.RunningAppProcessInfo.importance\u前台）{
for（字符串activeProcess:processInfo.pkgList）{
if（activeProcess.e）
  private void showSmallNotification(NotificationCompat.Builder mBuilder, int icon, String title, String message, String timeStamp, PendingIntent resultPendingIntent, Uri alarmSound) {

    private void showSmallNotification(NotificationCompat.Builder mBuilder, int icon, String title, String message, String timeStamp, PendingIntent resultPendingIntent, Uri alarmSound) {

    NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();

    inboxStyle.addLine(message);
    NotificationChannel mChannel = null;
    Notification notification;
    notification = mBuilder.setSmallIcon(icon).setTicker(title).setWhen(0)
            .setAutoCancel(true)
            .setContentTitle(title)
            .setContentIntent(resultPendingIntent)
            .setSound(alarmSound)
            .setStyle(inboxStyle)
            .setWhen(getTimeMilliSec(timeStamp))
            .setSmallIcon(R.drawable.noti)
            .setLargeIcon(BitmapFactory.decodeResource(mContext.getResources(), icon))
            .setContentText(message);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        mChannel = new NotificationChannel("mChannelID", "mChannelName",NotificationManager.IMPORTANCE_HIGH);
        mBuilder.setChannelId("mChannelID");
    }

    NotificationManager notificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        notificationManager.createNotificationChannel(mChannel);
    }
    notificationManager.notify(Config.NOTIFICATION_ID, mBuilder.build());
}