超简单的Android studio发送通知教学

val but:Button=findViewById(R.id.button)
but.setOnClickListener{

    val manager=getSystemService(NOTIFICATION_SERVICE) as NotificationManager
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        manager.createNotificationChannel(NotificationChannel("999","vip",NotificationManager.IMPORTANCE_DEFAULT))

    }
    val notification=NotificationCompat.Builder(this,"999")
        .setContentTitle("efs")
        .setContentText("adad")
        .setSmallIcon(R.drawable.ic_launcher_background)
        .build()

    manager.notify(1,notification)





}

设置一个id为button的按钮，在按钮的监听事件中写入代码（如上），不用改变任何代码，手机即可发送通知。