同步startActivityForResult - 等待活动来完成 [英] Synchronous startActivityForResult - Waiting for Activity to Complete

问题描述

我在哪里，我推出一个新的活动的应用程序，并且需要继续之前有活动的结果。

I have an application where I am launching a new Activity, and need to have the result of the activity before proceeding.

我意识到startActivityForResult是异步/非阻塞的，而且我可以在onActivityResult回调活动的结果。

I realize that startActivityForResult is asynchronous / non-blocking, and that I can get the result of the activity in the onActivityResult callback.

所以我猜我寻找的是等待活动，以回报的最佳途径...... 像这样的事情吧？还是有更好的办法吗？

So I guess what I'm looking for is the best way to wait for the activity to return... Something like this perhaps? Or is there a better way?

活动启动功能：

public String ActivityLauncher()
{
   //Set up Intent
   startActivityForResult(intent, 1);
   while (mIsActivityDone == false)
   {
       Thread.Sleep(250);
   }
   //Continue with processing
   String data = "<Data from Activity">
   return data;
}

回调：

protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
   //Pull out the data
   mIsActivityDone = true;
}

该数据需要恢复到一个更高的层次调用函数 - 这就是为什么我需要等待结果的ActivityLauncher功能

The data needs to be returned to a higher level calling function - this is why I need to wait for the result in the ActivityLauncher function.

谢谢！

推荐答案

这将阻止你的UI线程，以便其他活动将不会执行任何。 我会用一些由更高级别的功能，提供的回调类，在这种情况并调用回调函数 onActivityResult

This will block your UI thread so other activity will not execute either. I would use some kind of callback class provided by higher level function, in this kind of situation and call its callback function in onActivityResult

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