我需要检查，如果运行的某一块code线程的主（UI）线程上运行与否。我怎样才能做到这一点？

  Looper.myLooper（）== Looper.getMainLooper（）
 

如果返回true，那么你是在UI线程！

I need to check if the thread running a certain piece of code is running on the main (UI) thread or not. How can I achieve this?

Looper.myLooper() == Looper.getMainLooper()

if this returns true, then you're on the UI thread!