OREO-前台服务不显示前台通知

Question

public class BaseOverlayService extends Service {
    @Override
    public void onCreate() {
        super.onCreate();
        moveToForeground();
    }

    private void moveToForeground() {
        Notification notification = ...;
        super.startForeground(NOTIFICATION_ID, notification);
    }
}

if (Build.VERSION.SDK_INT == Build.VERSION_CODES.O) {
    NotificationManager mNotificationManager = ((NotificationManager) getSystemService(NOTIFICATION_SERVICE));
    mNotificationManager.startServiceInForeground(new Intent(this, BaseOverlayService.class), NOTIFICATION_ID, notification);
} else {
    startForeground(NOTIFICATION_ID, notification);
}

编辑

我的通知是这样创建的，到目前为止，它在数千个API<26的android设备上工作：

protected Notification foregroundNotification(int notificationId)
{
    boolean paused = MainApp.getPrefs().sidebarServicePaused();
    NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
    builder.setSmallIcon(R.drawable.icon_not);
    builder.setContentIntent(notificationIntent());
    builder.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.icon));
    builder.setContentTitle(getString(R.string.derived_app_name));
    builder.setContentText(getString(checkStatus() ? (paused ? R.string.service_notification_text_paused : R.string.service_notification_text_running) : R.string.service_notification_text_preparing));
    builder.setColor(Color.parseColor("#25baa2"));

    if (MainApp.getPrefs().hideNotificationIcon())
        builder.setPriority(NotificationCompat.PRIORITY_MIN);
    else
        builder.setPriority(NotificationCompat.PRIORITY_MAX);

    if (paused)
        builder.addAction(R.drawable.ic_play_arrow_black_24dp, getString(R.string.resume), resumeIntent(this));
    else
        builder.addAction(R.drawable.ic_pause_black_24dp, getString(R.string.pause), pauseIntent(this));

    return builder.build();
}

Answer 1

您可能需要为应用程序定义通知通道。检查日志，应该有警告。查看此介绍

我给你举个例子，在科廷。首先，这样做一个类。您需要在应用程序开始时调用createMainNotificationChannel（）一次。

class NotificationManager(private val context: Context) {

    companion object {
        private val CHANNEL_ID = "YOUR_CHANNEL_ID"
        private val CHANNEL_NAME = "Your human readable notification channel name"
        private val CHANNEL_DESCRIPTION = "description"
    }

    @RequiresApi(Build.VERSION_CODES.O)
    fun getMainNotificationId(): String {
        return CHANNEL_ID
    }

    @RequiresApi(Build.VERSION_CODES.O)
    fun createMainNotificationChannel() {
            val id = CHANNEL_ID
            val name = CHANNEL_NAME
            val description = CHANNEL_DESCRIPTION
            val importance = android.app.NotificationManager.IMPORTANCE_LOW
            val mChannel = NotificationChannel(id, name, importance)
            mChannel.description = description
            mChannel.enableLights(true)
            mChannel.lightColor = Color.RED
            mChannel.enableVibration(true)
            val mNotificationManager = context.getSystemService(Context.NOTIFICATION_SERVICE) as android.app.NotificationManager
            mNotificationManager.createNotificationChannel(mChannel)
    }
}

然后可以像这样使用util

fun createNotificationCompatBuilder(context: Context): NotificationCompat.Builder {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        return NotificationCompat.Builder(context, NotificationManager(context).mainNotificationId)
    } else {
        return NotificationCompat.Builder(context)
    }
}