'How to organize classes and layout

so i was trying to find how to make sub folders for java classes and the xml layouts, I have a big project to work on and having to many classes and layouts in 1 folder makes it messy, is there a video explaining it? because when I am trying to make folders it wont let the app run

android-studio directory project-organization

Solution 1:^[1]

managed to find the solution

for classes go here: stackoverflow guide for class folders

for layouts go here: guide for layout folders

Sources

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Source: Stack Overflow

Solution	Source
Solution 1	alenkogen