What is the Android UiThread (UI thread)

Question

Can someone explain to me what exactly the UI thread is? On developer.android.com it says about the runOnUiThread function

public final void runOnUiTh

Answer 1

All UI drawings etc. happen in a separate thread. Its called the UIThread. If you want to make any change to UI u must use make sure it happens in UIThread's context. Easiest way of doing it is to make use of runOnUiThread