Xamarin 小试牛刀 通知栏消息通知和按钮(基于Java代码人肉转换)

using System;
using Android.App;
using Android.Content;
using Android.Widget;
using Android.OS;

namespace App3
{

    [Activity(Label = "App3", MainLauncher = true, Icon = "@drawable/icon")]
    public class MainActivity : Activity
    {
        public static String ACTION_BTN = "com.example.notification.btn.login";

        public static String INTENT_NAME = "btnid";

        public const int INTENT_BTN_LOGIN = 1;

        static NotificationBroadcastReceiver mReceiver;

        public static NotificationManager NotifyManager;

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);
            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.Main);
            Button button = (Button)FindViewById(Resource.Id.btn_notification);
            button.Click += (sender, e) => { notification(); };

        }


        private void intiReceiver()
        {
            mReceiver = new NotificationBroadcastReceiver();
            IntentFilter intentFilter = new IntentFilter();
            intentFilter.AddAction(ACTION_BTN);
            ApplicationContext.RegisterReceiver(mReceiver, intentFilter);
        }

        public void unregeisterReceiver()
        {
            if (mReceiver != null)
            {
                ApplicationContext.UnregisterReceiver(mReceiver);
                mReceiver = null;
            }
        }


        private void notification()
        {
            unregeisterReceiver();
            intiReceiver();

            RemoteViews remoteViews = new RemoteViews(PackageName, Resource.Layout.notification);
            remoteViews.SetTextViewText(Resource.Id.tv_up, "首都机场精品无线");
            remoteViews.SetTextViewText(Resource.Id.tv_down, "已免费接入");

            Intent intent = new Intent(ACTION_BTN);
            intent.PutExtra(INTENT_NAME, INTENT_BTN_LOGIN);
            PendingIntent intentpi = PendingIntent.GetBroadcast(this, 1, intent, PendingIntentFlags.UpdateCurrent);
            remoteViews.SetOnClickPendingIntent(Resource.Id.btn_login, intentpi);

            Intent intent2 = new Intent();
            intent2.SetClass(this, typeof(MainActivity));
            intent2.SetFlags(ActivityFlags.NewTask | ActivityFlags.ClearTask);
            PendingIntent intentContent = PendingIntent.GetActivity(this, 0, intent2, PendingIntentFlags.UpdateCurrent);

            Notification.Builder builder = new Notification.Builder(this);

            builder.SetOngoing(false);
            builder.SetAutoCancel(false);
            builder.SetContent(remoteViews);
            builder.SetTicker("正在使用首都机场无线");
            builder.SetSmallIcon(Resource.Drawable.id_airport);

            Notification notification = builder.Build();
            notification.Defaults = NotificationDefaults.Sound;
            notification.Flags = NotificationFlags.NoClear;
            notification.ContentIntent = intentContent;
            NotifyManager = (NotificationManager)GetSystemService(Context.NotificationService);

            NotificationManager notificationManager = NotifyManager;
            notificationManager.Notify(0, notification);
        }


        class NotificationBroadcastReceiver : BroadcastReceiver
        {
            public override void OnReceive(Context context, Intent intent)
            {

                String action = intent.Action;
                if (action.Equals(ACTION_BTN))
                {
                    int btn_id = intent.GetIntExtra(INTENT_NAME, 0);
                    switch (btn_id)
                    {
                        case INTENT_BTN_LOGIN:
                            Toast.MakeText(context, "从通知栏点登录", ToastLength.Short).Show();

                            if (mReceiver != null)
                            {
                                context.ApplicationContext.UnregisterReceiver(mReceiver);
                                mReceiver = null;
                            }
                            NotificationManager notificationManager = NotifyManager;
                            notificationManager.Cancel(0);
                            break;
                    }


                }
            }
        }

    }



}