通知的基本用法

通知的基本用法
想要让手机弹出一条通知，只需要使用如下代码：
val manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
val notification = NotificationCompat.Builder(context, channelId)
        .setContentTitle("This is content title")
        .setContentText("This is content text")
        .setSmallIcon(R.drawable.small_icon)
        .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.large_icon))
        .build()
manager.notify(1, notification)

想要指定通知的点击事件，只需要使用如下代码：

val intent = Intent(this, NotificationActivity::class.java)
val pi = PendingIntent.getActivity(this, 0, intent, 0)
val manager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
val notification = NotificationCompat.Builder(context, channelId)
        .setContentTitle("This is content title")
        .setContentText("This is content text")
        .setSmallIcon(R.drawable.small_icon)
        .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.large_icon))
        .setContentIntent(pi)
        .build()
manager.notify(1, notification)