在Xamarin.Android处理活动整理事件 [英] Handle Activity Finishing Event In Xamarin.Android

问题描述

在Xamarin.android中有什么类似于 FormClosingEvent ？

我有两个活动 - A 和 B 。 B 正在保存一些数据，并从按钮点击的 A 中调用。我有 A 中的数据列表，并希望在 B 活动结束后自动更新。

任何建议如何做？

解决方案

听起来你想要使用 StartActivityForResult 与活动A以以下方式启动活动B

  var myIntent = new Intent（this，typeof（ActivityB））; 
 StartActivityForResult（myIntent，0）; 
  

ActivityA还应该覆盖 OnActivityResult 等待响应活动B的响应代码并根据需要进行更新。

  protected override void OnActivityResult（int requestCode，Result resultCode，Intent data）
 {
 base.OnActivityResult（requestCode，resultCode，data）; 
 if（resultCode == Result.Ok）{
 //在A 
中执行任何需要完成的任务
} 
  / pre> 
 
 
这一切都记录在 Xamarin的Android文档 
 
Is there anything similar to FormClosingEvent in Xamarin.android?

I have two activities - A and B. B is saving some data and is called from A on button click. I have list of data in A and want to automatically update it after B activity is finished.

Any suggestions how to do it?
解决方案
It sounds like you want to use StartActivityForResult with Activity A starting activity B in the following manner
var myIntent = new Intent (this, typeof(ActivityB));
StartActivityForResult (myIntent, 0);
ActivityA should also then override OnActivityResult waiting to respond to activity B's response code and update as necessary.
protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
{
  base.OnActivityResult(requestCode, resultCode, data);
  if (resultCode == Result.Ok) {
     // Do whatever needs to be done in A 
  }
}
This is all documented quite well in Xamarin's Android documentation

                        
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