My preferred Android Studio .gitignore

.gitignore

# Built application files
/*/build/

# Crashlytics configuations
com_crashlytics_export_strings.xml

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

# Gradle generated files
.gradle/

# Signing files
.signing/

# User-specific configurations
.idea/libraries/
.idea/workspace.xml
.idea/tasks.xml
.idea/.name
.idea/compiler.xml
.idea/copyright/profiles_settings.xml
.idea/encodings.xml
.idea/misc.xml
.idea/modules.xml
.idea/scopes/scope_settings.xml
.idea/vcs.xml
*.iml

# OS-specific files
.DS_Store
.DS_Store?
._*
.Spotlight-V100
.Trashes
ehthumbs.db
Thumbs.db

# Keystore files
*.jks

# Android Studio captures folder
captures/

# Log Files
*.log

# Android Studio Navigation editor temp files
.navigation/

# Generated files
bin/
gen/
out/

# Java class files
*.class

# Files for the ART/Dalvik VM
*.dex