开始研究Android平台软件编程,Xamarin Mono for Android上手快,跨平台共享代码,代价是bug多多,是一味可口的毒药啊!
环境VS2012 + Xamarin Mono Android 4.10.01073
先实现个小功能热热身,建立一个新Android Application工程,修改Activity1.cs代码如下:
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using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
namespace MyXamarinApp
{
[Activity(Label = "MyXamarinApp" , MainLauncher = true , Icon = "@drawable/icon" )]
public class Activity1 : Activity
{
int count = 1;
DateTime? lastBackKeyDownTime;
protected override void OnCreate(Bundle bundle)
{
base .OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
// Get our button from the layout resource,
// and attach an event to it
Button button = FindViewById<Button>(Resource.Id.MyButton);
button.Click += delegate { button.Text = string .Format( "{0} clicks!" , count++); };
}
public override bool OnKeyDown(Keycode keyCode, KeyEvent e)
{
if (keyCode == Keycode.Back && e.Action == KeyEventActions.Down)
{
if (!lastBackKeyDownTime.HasValue || DateTime.Now - lastBackKeyDownTime.Value > new TimeSpan(0, 0, 2))
{
Toast.MakeText( this .ApplicationContext, "再按一次退出程序" , ToastLength.Short).Show();
lastBackKeyDownTime = DateTime.Now;
}
else
{
Finish();
}
return true ;
}
return base .OnKeyDown(keyCode, e);
}
}
}
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功能很简单,就不解释了。请参照:http://www.cnblogs.com/weizilong/archive/2013/08/15/3259452.html
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