第一课 Hello

using System;

using Android.App;

using Android.Content;

using Android.Runtime;

using Android.Views;

using Android.Widget;

using Android.OS;

using Android.Util;

namespace MyLesson

{

    [Activity(Label = "Lesson1", MainLauncher = true, Icon = "@drawable/icon")]

    public class Lesson1 : Activity

    {

        int count = 1;

        TextView tv;

        protected override void OnCreate(Bundle bundle)

        {

            base.OnCreate(bundle);

            LinearLayout layout = new LinearLayout(this);

            layout.Orientation = Orientation.Vertical;

            tv = new TextView(this);

            tv.Text = "Hello";

            Button b = new Button(this);

            b.Text = "Click me";

            b.Click += b_Click;

            layout.AddView(tv);

            layout.AddView(b);

            SetContentView(layout);

        }

        void b_Click(object sender, EventArgs e)

        {

            tv.Text = "Click times：" + count;

            count++;

        }

    }

}

程序员喜欢的方式，纯代码方式。