These tutorials talk about which files in the android project are committed and which files are not ignored in a git repository.
gitignore is a text file that contains a list of files or patterns that are excluded while committing an android project.
Following are a list of files and patterns for gitignore files
java files are compiled to class files so class files are not required to commit to the repository
# Java class files *.class
a lot of temporary files are generated.
# generated files bin/ gen/
Gradle local files are not required and the build folder contains the build output of a project
# Ignore Gradle files .gradle/ build/
Configuration files like .iws, .ipr , .iml, local.properties can be excluded
# configuration .iws .ipr .iml local.properties
Build generated package files
The following generate package files are added.
# built generated package files *.apk *.ap_
Dalvik VM files
# the Dalvik VM files *.dex
Android projects open in either Android studio as well as Intelli IDEA.
These IDE-related files can be ignored.
# Android Studio / IntelliJ IDEA *.iws .idea/libraries .idea/tasks.xml .idea/vcs.xml .idea/workspace.xml /out/
Operation System specific files
# OS temparory files .DS_Store .Spotlight-V100 .Trashes ehthumbs.db Thumbs.db