如何启用安卓的状态 LED 或更改其颜色？

Question

我搜索了一下，但我无法弄清楚！！

有一些答案，但它们在Android 8.0或更高版本中不起作用。

我在阿里巴巴和WhatsApp上看到了这个功能！！

如果可以的话，请提供帮助！这也可以帮助其他人。

我的代码：

        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel channel = new NotificationChannel(getString(R.string.default_notification_channel_id), remoteMessage.getData().get("title"), NotificationManager.IMPORTANCE_DEFAULT);
            channel.enableLights(true);
            channel.setLightColor(0xff0000);
            channel.shouldShowLights();
            channel.canShowBadge();
            notificationManager.createNotificationChannel(channel);
        }
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, "0")
            .setSmallIcon(R.drawable.ic_notification)
            .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_notification))
            .setContentTitle(remoteMessage.getData().get("title"))
            .setContentText(remoteMessage.getData().get("message"))
            .setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
            .setPriority(NotificationCompat.PRIORITY_MAX)
            .setVibrate(new long[] {0, 1000, 200,1000 })
            .setChannelId(getString(R.string.default_notification_channel_id))
            .setLights(Color.RED, 100 , 100)
            .setAutoCancel(true);

        if (notificationManager != null) {
            Notification notification = notificationBuilder.build();
            notification.ledARGB = 0xFFff0000;
            notification.flags = Notification.FLAG_SHOW_LIGHTS;
            notification.ledOnMS = 100;
            notification.ledOffMS = 100;
            notificationManager.notify(new Random().nextInt(60000), notification);
        }

Answer 1

在通道中启用灯光

https://developer.android.com/reference/android/app/NotificationChannel.html#enableLights(布尔值(

Answer 2

已弃用的代码，所以我应该删除这些：

        notification.ledARGB = 0xFFff0000;
        notification.flags = Notification.FLAG_SHOW_LIGHTS;
        notification.ledOnMS = 100;
        notification.ledOffMS = 100;

并将IMPORTANCE_DEFAULT替换为如下所示IMPORTANCE_MAX

NotificationChannel channel = new NotificationChannel(getString(R.string.default_notification_channel_id), 
remoteMessage.getData().get("title"), NotificationManager.IMPORTANCE_MAX);

就像@tyzj的回答和@dharms评论一样，我用alpha颜色添加了这个：

channel.enableLights(true);
channel.setLightColor(0xffff0000)

并改变了

.setLights(Color.RED, 100 , 100) 

自

.setLights(0xffff0000, 1000 , 1000)