android 通知（android 8.0可用）

 

val CHANNEL_ID = "com.chao.channel.id";
val CHANNEL_NAME = "com.chao.channel.name";

val manager =  getSystemService(NOTIFICATION_SERVICE) as NotificationManager
var builder = null

//判断是否需要开启通道
if(shouldCreateNowPlayingChannel()){
    //在这里开启通道
    createNowPlayingChannel()
}

if(Build.VERSION.SDK_INT < Build.VERSION_CODES.O){
        builder = Notification.Builder(this)
}else{
      builder = new Notification.Builder(this,Config.CHANNEL_ID)
 } 
notification = builder.build()
mManager.notify(555, notification)

 

部分机型使用IMPORTANCE_LOW MIN NONE仍然发出提示音问题，修改channelId，可以解决

//判断是否需要创建通道
private fun shouldCreateNowPlayingChannel() =
        Build.VERSION.SDK_INT >= Build.VERSION_CODES.O && !nowPlayingChannelExists()
//android8.0及以上才能调用 判断当前通道是否存在
//manager.getNotificationChannle(key)  如果通道已开启就能获取到  否则获取为null
@RequiresApi(Build.VERSION_CODES.O)
private fun nowPlayingChannelExists() =
    manager.getNotificationChannel(CHANNEL_NAME) != null

@RequiresApi(Build.VERSION_CODES.O)
private fun createNowPlayingChannel() {
    /**
     * Oreo不用Priority了，用importance
     * IMPORTANCE_NONE 关闭通知
     * IMPORTANCE_MIN 开启通知，不会弹出，但没有提示音，状态栏中无显示
     * IMPORTANCE_LOW 开启通知，不会弹出，不发出提示音，状态栏中显示
     * IMPORTANCE_DEFAULT 开启通知，不会弹出，发出提示音，状态栏中显示
     * IMPORTANCE_HIGH 开启通知，会弹出，发出提示音，状态栏中显示
     */
    val notificationChannel = NotificationChannel(
        CHANNEL_ID,
        CHANNEL_NAME,
        NotificationManager.IMPORTANCE_HIGH
    )
        .apply {
            description = "test"
        }
    manager.createNotificationChannel(notificationChannel)
}