public class MyNotificationUtils {

    private static NotificationManager manager;
    private static NotificationManager getManager(Context context) {
        if (manager == null) {
            manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        }
        return manager;
    }
    private static NotificationCompat.Builder getNotificationBuilder(Context mContext,String title
            , String content, String channelId) {
        //大于8.0
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            //id随便指定
            NotificationChannel channel = new NotificationChannel(channelId
                    , mContext.getPackageName(), NotificationManager.IMPORTANCE_DEFAULT);
            channel.canBypassDnd();//可否绕过，请勿打扰模式
            channel.enableLights(true);//闪光
            channel.setLockscreenVisibility(Notification.VISIBILITY_SECRET);//锁屏显示通知
            channel.setLightColor(Color.RED);//指定闪光是的灯光颜色
            channel.canShowBadge();//桌面laucher消息角标
            channel.enableVibration(true);//是否允许震动
            channel.setSound(null, null);
            //channel.getAudioAttributes();//获取系统通知响铃声音配置
            channel.getGroup();//获取通知渠道组
            channel.setBypassDnd(true);//设置可以绕过，请勿打扰模式
            channel.setVibrationPattern(new long[]{100, 100, 200});//震动的模式，震3次，第一次100，第二次100，第三次200毫秒
            channel.shouldShowLights();//是否会闪光
            //通知管理者创建的渠道
            getManager(mContext).createNotificationChannel(channel);

        }

            return new NotificationCompat.Builder(mContext,channelId).setAutoCancel(true)
                    .setContentTitle(title)
                    .setContentText(content).setSmallIcon(R.mipmap.ic_launcher);

    }

    /**
     *
     * @param title
     * @param content
     * @param manageId
     * @param channelId
     * @param progress
     * @param maxProgress
     */
    public static void showNotificationProgress(Context mContext,String title
            , String content, int manageId, String channelId
            , int progress, int maxProgress) {
        final NotificationCompat.Builder builder = getNotificationBuilder(mContext,title,content,channelId);
       /* Intent intent = new Intent(this, SecondeActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0);
        builder.setContentIntent(pendingIntent);*/
        builder.setOnlyAlertOnce(true);
        builder.setDefaults(Notification.FLAG_ONLY_ALERT_ONCE);
        builder.setProgress(maxProgress, progress, false);
        builder.setWhen(System.currentTimeMillis());
        getManager(mContext).notify(manageId, builder.build());
    }


    public static void showNotificationProgressApkDown(Context mContext
            , int progress) {
        final NotificationCompat.Builder builder = getNotificationBuilder(mContext,"正在下载","appName","msg");
        builder.setOnlyAlertOnce(true);
        builder.setDefaults(Notification.FLAG_ONLY_ALERT_ONCE);
        builder.setProgress(100, progress, false);
        builder.setWhen(System.currentTimeMillis());
        getManager(mContext).notify(R.drawable.ic_launcher, builder.build());
    }

    public static void cancleNotification(Context mContext,int manageId) {
        getManager(mContext).cancel(manageId);
    }