public void onWindowFocusChanged (boolean hasFocus) 参数hasFocus: the window of this activity has focus. 是指activity是否获取或失去了focus,获得到了该参数为true,否则为false.一般是进入或恢复Actiity时为true,Actvity销毁或者退到后台则为false. Called when the current Window of the activity gains or
使用委托进行异步操作,处理一些耗时操作,防止主线程阻塞 使用例子: using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Demo { class Program { static void Main(string[] args) { Func<string> fun = new Func<string>(Test); Console.Write
using System; using System.Collections.Generic; using System.Diagnostics; using System.Linq; using System.Text; using System.Threading; using System.Threading.Tasks; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { St