Question

我有一个简单的方法，按钮的onclick（）应该生成状态栏通知，但由于某种原因，它没有显示。

public void createNotification() {
    NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
            .setSmallIcon(android.R.drawable.ic_dialog_alert)
            .setContentTitle("Notification!")
            .setContentText("This is my first notification!");
    Notification notification = builder.build();
    NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
    notificationManager.notify(0, notification);
}

Answer 1

在Android 8（API级别26）中，必须将所有通知分配给频道。这项工作对我来说：

    NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getContext(), CHANNEL_ID)
            .setSmallIcon(R.drawable.emo_no_paint_120)
            .setContentTitle("title")
            .setContentText("content")
            .setColor(Color.parseColor("#009add"))
            .setAutoCancel(true);

    NotificationManager notificationManager = (NotificationManager) getContext().getSystemService(
            NOTIFICATION_SERVICE);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        NotificationChannel mChannel = new NotificationChannel(CHANNEL_ID, CHANNEL_NAME, NotificationManager.IMPORTANCE_HIGH);

        notificationManager.createNotificationChannel(mChannel);
    }

    notificationManager.notify(0, mBuilder.build());

您应该添加AppCompat库

implementation 'com.android.support:support-compat:27.1.0'

您可以查看official Android Docs

Answer 2

您的代码没问题。但由于您的目标是Android 8.0，因此您需要实施通知渠道，因为这是Android Oreo中的首选方式。

https://developer.android.com/guide/topics/ui/notifiers/notifications.html

状态栏通知未显示？

2 个答案: