8.0后通知增加channel机制，需要对不同版本进行适配

    实现了一个适配Androi8.0的通知类

    1. public class MyNotification {
    2.     /**
    3.      * 发送通知方法
    4.      */
    5.     public static void sendNotification(Context context, int notifNum) {
    6.         // 通知功能
    7.         NotificationManager nManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    8.         // 新版适配
    9.         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
    10.             NotificationChannel nChannel = new NotificationChannel("channel001", "通道001", NotificationManager.IMPORTANCE_HIGH);
    12.             nManager.createNotificationChannel(nChannel);
    13.             Notification notification = getNotificationWithChannel("通知", "这是当前通知计数" + notifNum, "channel001", context);
    14.             nManager.notify(0x001, notification);
    15.         }
    16.         // 旧版
    17.         else {
    18.             Notification notification = getNotification("通知", "这是当前通知计数" + notifNum, context);
    19.             nManager.notify(0x001, notification);
    20.         }
    22.         System.out.println("notification异步任务启动输出测试");
    23.     }
    25.     /**
    26.      * 新版适配
    27.      */
    28.     @TargetApi(Build.VERSION_CODES.O)
    29.     public static Notification getNotificationWithChannel(String Title, String Content, String ChannelId, Context context) {
    30.         Notification.Builder builder = new Notification.Builder(context, ChannelId);
    31.         return builder.setContentTitle(Title)
    32.                 .setContentText(Content)
    33.                 .setWhen(System.currentTimeMillis())
    34.                 .setSmallIcon(R.drawable.img0)
    35.                 .build();
    36.     }
    38.     /**
    39.      * 旧版方法
    40.      */
    41.     public static Notification getNotification(String Title, String Content, Context context) {
    42.         NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
    43.         return builder.setContentTitle(Title)
    44.                 .setContentText(Content)
    45.                 .setWhen(System.currentTimeMillis())
    46.                 .setSmallIcon(R.drawable.img0)
    47.                 .build();
    48.     }
    49. }