Standard Git ignore file

.gitignore

# ndk generated files
**/obj/

# built application files
*.apk
*.ap_

# lint files
lint.xml

# files for the dex VM
*.dex

# Java class files
*.class

# generated files
bin/
gen/
classes/
gen-external-apklibs/

# maven output folder
target

# Local configuration file (sdk path, etc)
local.properties

# Eclipse project files
.classpath
.project
.metadata
.settings

# IntelliJ files
.idea
*.iml

out
.gradle
/.idea/workspace.xml
.DS_Store
build

# Windows files
Thumbs.db

# vi swap files
*.swp

# backup files
*.bak

vals.xml
sign-release.jks

com_crashlytics_export_strings.xml
/app/src/main/assets/crashlytics-build.properties

# emacs backup files
*~

# generated proguard files
/app/mapping.txt
/app/unused.txt
/app/seeds.txt