案例分析：我需要一个程序，将在机器人添加通知。当有人点击该通知应该带领他们到我的第二个活动。

我已经建立了一个code。该通知应该是工作，但由于某种原因它不工作。该通知没有显示在所有。不知道我在想什么。

code的那些文件的：

 通知N =新Notification.Builder（本）
                .setContentTitle（与新邮件+test@gmail.com）
                .setContentText（主题）
                .setContentIntent（pIntent）.setAutoCancel（真）
                .setStyle（新Notification.BigTextStyle（）。bigText（长文本））
                。建立（）;

        NotificationManager notificationManager =（NotificationManager）getSystemService（NOTIFICATION_SERVICE）;
        //隐藏其选中后通知

        notificationManager.notify（0，n）的;
 

作为@dmmh说没有和图标的code不会工作解决方案

。因此，修改code与

  .setSmallIcon（R.drawable.icon）
 

该项目完美地运行。

Case study: I need a program that will add a notification at android. And when someone click on the notification it should lead them to my second activity.

I have established a code. The notification should be working, but for some reason it is not working. The Notification isn't showing at all. Dont know what am i missing.

Code of those files:

        Notification n = new Notification.Builder(this)
                .setContentTitle("New mail from " + "test@gmail.com")
                .setContentText("Subject")
                .setContentIntent(pIntent).setAutoCancel(true)
                .setStyle(new Notification.BigTextStyle().bigText(longText))
                .build();

        NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        // Hide the notification after its selected

        notificationManager.notify(0, n);

As @dmmh said the code wont work without and icon. So after modifying the code with

.setSmallIcon(R.drawable.icon)

the project run perfectly.