mono for android Listview 里面按钮 view Button click 注册方法 并且传值给其他Activity 主要是context

需求：为Listview的Item里面的按钮Button添加一个事件，单击按钮时通过事件传值并跳转到新的页面。

环境：mono

效果：

布局代码

主布局

 <?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">
     <ListView
         android:id="@+id/myList"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent" />
 </LinearLayout>

MainLayout

Item布局

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="10dp"
              >

  <TextView
    android:id="@+id/txt"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    />

  <Button
    android:id="@+id/btn"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    />
</RelativeLayout>

ListviewItemlayout

MainActivity

 using System;

 using Android.App;
 using Android.Content;
 using Android.Runtime;
 using Android.Views;
 using Android.Widget;
 using Android.OS;
 using System.Collections.Generic;

 namespace ListViewItemBtnClick
 {
     [Activity(Label = "ListViewItemBtnClick", MainLauncher = true, Icon = "@drawable/icon")]
     public class Activity1 : Activity
     {
         ListView listView;

         protected override void OnCreate(Bundle bundle)
         {
             base.OnCreate(bundle);

             SetContentView(Resource.Layout.Main);

             listView = FindViewById<ListView>(Resource.Id.myList);

             //填充Listview
             getList(listView);

         }

         //获取Listview
         private void getList(ListView listview)
         {

             Adapter goodsAdapter = new Adapter(this);
             List<Item> itemList = new List<Item>();
             Item item = new Item();

             //给Item赋值 并且添加到list里面
             for (int i = ; i <; i++)
             {
                 item.title = i + "|标题|";
                 item.button = i + "btn";
                 itemList.Add(item);
             }
             //给adapter中添加list的值
             foreach (Item item1 in itemList)
             {
                 goodsAdapter.Add(item1);
             }
             //将adapter的值付给listview
             listview.Adapter = goodsAdapter;
         }

     }
 }

MainActivity

Item类

    class Item
    {
        //标题 textview
        public string title { get; set; }
        //按钮
        public string button { get; set; }
    }

Item

Adapter配置数据

 namespace ListViewItemBtnClick
 {
     class Adapter:ArrayAdapter<Item>,View.IOnClickListener
     {

         private Context context;

         public Adapter(Context context):base(context,){
             //通过构造函数获取context
             this.context = context;

         }

         public override View GetView(int position, View convertView, ViewGroup parent)
         {
             View view;
             //如果convertView不为空则直接使用
             if (convertView!=null)
             {
                 view = convertView;

             }

             else
             {
                 view = LayoutInflater.From(this.Context).Inflate(Resource.Layout.ListItem, null);

             }

             //设置title的值
             TextView title = view.FindViewById<TextView>(Resource.Id.txt);
             Button btn = view.FindViewById<Button>(Resource.Id.btn);

             Item item = GetItem(position);

             title.Text = item.title + position;
             //给每个按钮添加一个tag tag的值为position 或者自定义的ID
             btn.SetTag(Resource.Id.btn,position);
             btn.Text ="--"+ position+"---";
             //注册事件
             btn.SetOnClickListener(this);
             return view;
         }

         public void OnClick(View v)
         {
             //获得点击的按钮
             Button btn = v as Button;
             //获得tag
             int id =  Convert.ToInt32(btn.GetTag(btn.Id));

             Intent it = new Android.Content.Intent();

             it.SetClass(context,typeof(Activity2));
             it.PutExtra("pos", id);
             //注意！启动新Activity
             context.StartActivity(it);
         }
     }
 }

Adapter

在其他地方显示数据

  string PosValue = Intent.GetStringExtra("pos");

             Toast.MakeText(this, PosValue.ToString(), ToastLength.Long).Show();

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