Android开发版本控制需要忽略的文件：
# Built application files
*.apk
*.ap_
# Files for the ART/Dalvik VM
*.dex
# Java class files
*.class
# Generated files
bin/
gen/
out/
# Gradle files
.gradle/
build/
# Local configuration file (sdk path, etc)
local.properties
# Proguard folder generated by Eclipse
proguard/
# Log Files
*.log
# Android Studio Navigation editor temp files
.navigation/
# Android Studio captures folder
captures/
# Intellij
*.iml
.idea/workspace.xml
.idea/tasks.xml
.idea/gradle.xml
.idea/dictionaries
.idea/libraries
# Keystore files
*.jks
# External native build folder generated in Android Studio 2.2 and later
.externalNativeBuild
# Google Services (e.g. APIs or Firebase)
google-services.json
# Freeline
freeline.py
freeline/
freeline_project_description.json