More detail, the usage of let, also, apply, run, with. When you first writing Kotlin, you must have questions on what is the difference between all these lambda functions and how to use them. This is a notes on how to properly use these lambda functions.

Here is how you can unwrap optional variable in Kotlin

I have submit the .ipa file to App Store using application loader and didn’t see the builds processing in the activity field, nor receive any email. Took me a while to figure out.

A small issue about Multiple dex files define Landroid/support/v4/os/ResultReceiver

How to setup android deep link with custom url scheme?

According to Official Documentation, always close the realm instance when you done with them.

So I add in a graphQL query and when I build or clean, it gives me the following error message.

Create a tab layout on Android

If I have an MotionEvent from onTouchListener or dispatchTouchEvent, how to I filter on tap? Say if I want to build an analytics only log when user click on the screen and all I can get is that MotionEvent, what should I do?

I need to detect that user init a scroll for analytics. Assume you are working on a ScrollView or RecyclerView. Here is how.