Android 9下的startForeground（）

问题描述 投票：0回答：2

不久前，我为Android 7.1开发了一个应用。由于使用startForeground（），尝试在其他智能手机（Android 9）上运行该应用程序失败。 

Intent notificationIntent = new Intent(getApplicationContext(), MyService.class);

            PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0,
                    notificationIntent, 0);

            Notification notification = new Notification.Builder(getApplicationContext())
                    .setSmallIcon(R.mipmap.ic_launcher)
                    .setContentTitle("title")
                    .setContentText("Foreground-Service running")
                    .setContentIntent(pendingIntent).build();

            startForeground(101, notification);

我遇到以下错误：

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.test2app, PID: 14754
android.app.RemoteServiceException: Bad notification for startForeground: java.lang.RuntimeException: invalid channel for service notification: Notification(channel=null pri=0 contentView=null vibrate=null sound=null defaults=0x0 flags=0x40 color=0x00000000 vis=PRIVATE)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1737)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

我添加了此权限：

<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />

我该如何解决？

android foreground-service
2个回答
0
投票
    NotificationManager notificationmanager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);    
    String str = "ch_id_i";
            if (VERSION.SDK_INT >= 26) {
                NotificationChannel notificationChannel = new NotificationChannel(str, "name", 
                NotificationManager.IMPORTANCE_LOW);
                notificationChannel.enableLights(true);
                notificationChannel.setLightColor(SupportMenu.CATEGORY_MASK);
                notificationChannel.enableVibration(false);
                notificationChannel.setShowBadge(false);
               notificationmanager.createNotificationChannel(notificationChannel);
            }

builder = new NotificationCompat.Builder(context, str);
0
投票

它正在工作：

Intent notificationIntent = new Intent(getApplicationContext(), MyService.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0,
                    notificationIntent, 0);
            createNotificationChannel();
            NotificationCompat.Builder builder = new NotificationCompat.Builder(ctx, CHANNEL_ID);
                builder.setSmallIcon(R.drawable.ic_launcher_background);
                builder.setContentTitle("title");
                builder.setContentText("text");
                builder.setPriority(NotificationCompat.PRIORITY_DEFAULT);
                builder.setContentIntent(pendingIntent);
            startForeground(1, builder.build());

    private void createNotificationChannel() {
    // Create the NotificationChannel, but only on API 26+ because
    // the NotificationChannel class is new and not in the support library
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        CharSequence name = "Foregroundservice MyService.java";
        String description = "Benachrichtigung über das Aktivieren des Foreground-Service";
        int importance = NotificationManager.IMPORTANCE_DEFAULT;
        NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, importance);
        channel.setDescription(description);
        // Register the channel with the system; you can't change the importance
        // or other notification behaviors after this
        NotificationManager notificationManager = getSystemService(NotificationManager.class);
        notificationManager.createNotificationChannel(channel);
    }

良好参考：https://developer.android.com/training/notify-user/build-notification#java

0
投票

它正在工作：

Intent notificationIntent = new Intent(getApplicationContext(), MyService.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0,
                    notificationIntent, 0);
            createNotificationChannel();
            NotificationCompat.Builder builder = new NotificationCompat.Builder(ctx, CHANNEL_ID);
                builder.setSmallIcon(R.drawable.ic_launcher_background);
                builder.setContentTitle("title");
                builder.setContentText("text");
                builder.setPriority(NotificationCompat.PRIORITY_DEFAULT);
                builder.setContentIntent(pendingIntent);
            startForeground(1, builder.build());

    private void createNotificationChannel() {
    // Create the NotificationChannel, but only on API 26+ because
    // the NotificationChannel class is new and not in the support library
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        CharSequence name = "Foregroundservice MyService.java";
        String description = "Benachrichtigung über das Aktivieren des Foreground-Service";
        int importance = NotificationManager.IMPORTANCE_DEFAULT;
        NotificationChannel channel = new NotificationChannel(CHANNEL_ID, name, importance);
        channel.setDescription(description);
        // Register the channel with the system; you can't change the importance
        // or other notification behaviors after this
        NotificationManager notificationManager = getSystemService(NotificationManager.class);
        notificationManager.createNotificationChannel(channel);
    }

良好参考：https://developer.android.com/training/notify-user/build-notification#java

-1
投票

类似的东西，但是要自己建立

private NotificationManager notifManager;

public void createNotification(String aTitle, String aMessage, int channelID, Context context, JobParameters params) {

        NotificationManager notifManager;
        Random rnd = new Random();
        int dynamicRequestCode = rnd.nextInt(9999 - 1000) + 1000;  
        dynamicRequestCode += rnd.nextInt(100) + 1;
        final int NOTIFY_ID = channelID;
        String id = String.valueOf(channelID); 
        String title = "Channel Title"; 
        Intent intent;
        PendingIntent pendingIntent;
        NotificationCompat.Builder builder;
        if (notifManager == null) {
            notifManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
        }
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            int importance = NotificationManager.IMPORTANCE_HIGH;
            NotificationChannel mChannel = notifManager.getNotificationChannel(id);
            if (mChannel == null) {
                AudioAttributes att = new AudioAttributes.Builder()
                        .setUsage(AudioAttributes.USAGE_NOTIFICATION)
                        .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
                        .build();
                mChannel = new NotificationChannel(id, title, importance);
                mChannel.enableVibration(true);
                mChannel.setVibrationPattern(new long[]{0, 250, 200, 250, 150, 150, 75, 150, 75, 150});
                notifManager.createNotificationChannel(mChannel);
            }
            builder = new NotificationCompat.Builder(context, id);
            intent = new Intent(context, your_activity.class);
            intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
            pendingIntent = PendingIntent.getActivity(context, dynamicRequestCode, intent, 0);

            builder.setContentTitle(aTitle)                           
                    .setSmallIcon(R.drawable.ic_event)   
                    .setDefaults(Notification.DEFAULT_ALL)
                    .setStyle(new NotificationCompat.BigTextStyle()
                            .bigText(aMessage))
                    .setContentText(aMessage) 
                    .setAutoCancel(true)
                    .setContentIntent(pendingIntent)
                    .setTicker(aMessage)
                    .setVibrate(new long[]{0, 250, 200, 250, 150, 150, 75, 150, 75, 150});
        } else {
            builder = new NotificationCompat.Builder(context, id);
            intent = new Intent(context, your_activity.class);
            intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
            pendingIntent = PendingIntent.getActivity(context, dynamicRequestCode, intent, 0);
            builder.setContentTitle(aTitle)                            
                    .setSmallIcon(R.drawable.ic_event)   
                    .setDefaults(Notification.DEFAULT_ALL)
                    .setAutoCancel(true)
                    .setStyle(new NotificationCompat.BigTextStyle()
                            .bigText(aMessage))
                    .setContentText(aMessage) 
                    .setContentIntent(pendingIntent)
                    .setTicker(aMessage)
                    .setVibrate(new long[]{0, 250, 200, 250, 150, 150, 75, 150, 75, 150})
                    .setPriority(Notification.PRIORITY_DEFAULT);
        }
        Notification notification = builder.build();
        Random random = new Random();
        int num = random.nextInt(999 - 100) + 100;
        num += random.nextInt(10) + 1;                
        notifManager.notify(num, notification);

我已经在我的上一个项目中做到了这一点。我已经做出了随机请求代码，以避免覆盖通知。

以及服务内的呼叫：

@Override
    public boolean onStartJob(JobParameters params) {
        Log.d(TAG, "onStartJob: Job Started");
        doBackgroundWork(params);
        return true;
    }

    private void doBackgroundWork(final JobParameters params) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                notifiy(params);
            }
        }).start();
    }

    public void notifiy(JobParameters params) { 

        createNotification("Title", "Notification body", NOTIFICATION_CHANNEL_ID, getApplicationContext(), params);
        jobFinished(params, false);

    }
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