What is setContentView(R.layout.main)?
android, layout
Solution
In Android the visual design is stored in XML files and each Activity is associated to a design.
setContentView(R.layout.main)
`R` means Resource
`layout` means design
`main` is the xml you have created under `res->layout->main.xml`
Whenever you want to change the current look of an Activity or when you move from one Activity to another, the new Activity must have a design to show. We call `setContentView` in onCreate with the desired design as argument.
Problem
I understand that it has to do with the App layout, but when do I have to use it? I tried to look for a link that explained this method, but I couldn't find it. Thank you in advance!