在Android最新的版本（8.0）中糊余，通知欄的顯示已經(jīng)不像之前那么簡單秀又，必須給Notification添加channel，這是8.0的新特性贬芥，如果不加這個channel吐辙，會導致通知欄無法顯示。代碼如下：
NotificationCompat.Builder builder = null;
if(android.os.Builde.VERSION.SDK_INT >= Builder.VERSION_CODES.O)?{
NotificationChannel channel = new NotificationChannel(PRIMARY_CHANNEL, 'Primary channel', NotificationManager.IMPORTANCE_DEFAULT);
channel.setLightColor(Color.GREEN);
channel.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);
notificationManager.createNotificationChannel(channel);
builder = new NotificationCompat.Builder(context, PRIMARY_CHANNEL);
}
