如何在Xamarin Android中等待处理程序线程完成？

Question

How to wait for the handler.PostDelayed to finish before the function continues?

    int num = null;
    public int DoSomething()
    {

            var handler = new Handler();
            handler.PostDelayed(() => StartCapital(), 10);

            handler.PostDelayed(() =>
            {
                    num = StartGain();
            }, 300);

           return num;
     }

how to Wait for the StartGain() Method thread to finish? the method takes sometime to finish and the Function it is in returns null

Answer 1

This looks like a problem in understanding the way Threads work, You create a background thread so that you won't have to block the main thread for some huge process to finish among many other uses,

Like in your case the method StartGain() will be executed on the main thread after a delay of 300ms so if you don't want to wait remove the delay and the handler and run it on the normal flow. If the value that method returns are needs for the further calculations then run it in a separate background thread before continuing.