【Android】15.4 例15-2--Notification基本用法

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <Button
        android:id="@+id/ch1502_btn1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="发布通知" />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:minWidth="25px"
    android:minHeight="25px">
    <TextView
        android:text=""
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:id="@+id/ch1502_textView1" />
</LinearLayout>

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

namespace MyDemos.SrcDemos
{
    [Activity(Label = "【例15-2】Notification基本用法")]
    public class ch1502SecondActivity : Activity
    {
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);

            // 获取MainActivity中传递的count值，如果不存在count则返回-1
            int count = Intent.Extras.GetInt("count", -1);

            // 如果没有传递count，直接返回
            if (count <= 0)
            {
                return;
            }

            SetContentView(Resource.Layout.ch1502_Second);
            TextView txtView = FindViewById<TextView>(Resource.Id.textView1);
            txtView.Text = string.Format("你单击了 {0} 次按钮。", count);
        }
    }
}

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

namespace MyDemos.SrcDemos
{
    [Activity(Label = "ch1502MainActivity")]
    public class ch1502MainActivity : Activity
    {
        // 通知的唯一ID号 
        private static readonly int ButtonClickNotificationId = 1000;

        // 单击按钮的次数
        private int count = 1;

        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            SetContentView(Resource.Layout.ch1502_Main);
            Button button = FindViewById<Button>(Resource.Id.ch1502_btn1);
            button.Click += Button_Click;
        }

        private void Button_Click(object sender, EventArgs e)
        {
            // 传递count到下一个activity:
            Bundle valuesForActivity = new Bundle();
            valuesForActivity.PutInt("count", count);

            // 当用户单击通知时，启动SecondActivity
            Intent resultIntent = new Intent(this, typeof(ch1502SecondActivity));

            resultIntent.PutExtras(valuesForActivity);

            // 为跨任务导航构造back stack
            TaskStackBuilder stackBuilder = TaskStackBuilder.Create(this);
            stackBuilder.AddParentStack(Java.Lang.Class.FromType(typeof(ch1502SecondActivity)));
            stackBuilder.AddNextIntent(resultIntent);

            // 为 back stack 创建 PendingIntent            
            PendingIntent resultPendingIntent = stackBuilder.GetPendingIntent(0, PendingIntentFlags.UpdateCurrent);

            // 创建通知
            Notification.Builder builder = new Notification.Builder(this)
                .SetAutoCancel(true)                    // 单击通知时取消通知（让通知消失）
                .SetContentIntent(resultPendingIntent)  // 单击Intent时启动activity
                .SetContentTitle("简单通知示例")        // 标题
                .SetNumber(count)                       // 在Content Info中显示count的值
                .SetDefaults(NotificationDefaults.Sound | NotificationDefaults.Vibrate) //显示通知时播放声音并振动
                .SetSmallIcon(Resource.Drawable.ch1502statButton) // 显示的通知图标
                .SetContentText(string.Format("你已经单击了 {0} 次按钮。", count)); // 显示的消息

            // 发布通知
            NotificationManager notificationManager = GetSystemService(NotificationService) as NotificationManager;
            notificationManager.Notify(ButtonClickNotificationId, builder.Build());

            // 按钮次数加1
            count++;
        }
    }
}