Randy Tong

You want scroll relative layout to top?

Where is your setAdapter() ?

You're not calling sumbetween method.

that's why I like dogs more than cats

You can use ConstraintLayout.

I have below code where date is instance of Date
if (date != null) {     toast("not null")  } else {       toast("it is null")    }
This is how I initialize date
var date: Date? = null
The output is always "it is null". But why after I change to below code, it become not null?
if(date.toString()!=null)

Congratz all

Where you set your Buttons ? Is it in LinearLayout ?

Is your button set to recyclerView?

Once the pdf file done created, what the user will do next? Will it has a submit button for user to submit to firebase?

https://stackoverflow.com/questions/38472916/how-to-swipe-viewpager-images-automatically-using-timetask/38473204

How you create the pdf file? How you know the pdf file is done created? Maybe you can store pdf file locally, then get the path and send to firebase ?  

What you mean by automatic?