https://github.com/github/gitignore是很棒的收藏

Android.gitignore

# 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/assetWizardSettings.xml
.idea/dictionaries
.idea/libraries
.idea/caches

# Keystore files
# Uncomment the following line if you do not want to check your keystore files in.
#*.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

# fastlane
fastlane/report.xml
fastlane/Preview.html
fastlane/screenshots
fastlane/test_output
fastlane/readme.md

我用这个。gitignore。我在http://th4t.net/android-studio-gitignore.html找到了它

*.iml
*.iws
*.ipr
.idea/
.gradle/
local.properties

*/build/

*~
*.swp

我有忽略构建文件的问题，但这似乎是有效的:-)

# built application files
*.apk
*.ap_

# files for the dex VM
*.dex

# Java class files
*.class

# generated files
bin/
gen/

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

# Eclipse project files
.classpath
.project

# Android Studio
.idea/
.gradle
/*/local.properties
/*/out
/*/*/build
/*/*/production
*.iml
*.iws
*.ipr
*~
*.swp

*/build
*/production
*/local.properties
*/out

这份来自JetBrains Support的官方文档认为应该包含以下内容:

All files under .idea directory except workspace.xml and tasks.xml because
    they store specific user settings
All the *.iml files that can be located in different module directories

它还给出了其他需要注意的事项的建议。

.gitignore从AndroidRate库

# Copyright 2017 - 2018 Vorlonsoft LLC
#
# Licensed under The MIT License (MIT)

# Built application files
*.ap_
*.apk

# Built library files
*.aar
*.jar

# Built native files
*.o
*.so

# Files for the Dalvik/Android Runtime (ART)
*.dex
*.odex

# Java class files
*.class

# Generated files
bin/
gen/
out/

# Gradle files
.gradle/
build/

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

# Windows thumbnail cache
Thumbs.db

# macOS
.DS_Store/

# Log Files
*.log

# Android Studio
.navigation/
captures/
output.json

# NDK
.externalNativeBuild/
obj/

# IntelliJ
## User-specific stuff
.idea/**/tasks.xml
.idea/**/workspace.xml
.idea/dictionaries
## Sensitive or high-churn files
.idea/**/dataSources/
.idea/**/dataSources.ids
.idea/**/dataSources.local.xml
.idea/**/dynamic.xml
.idea/**/sqlDataSources.xml
.idea/**/uiDesigner.xml
## Gradle
.idea/**/gradle.xml
.idea/**/libraries
## VCS
.idea/vcs.xml
## Module files
*.iml
## File-based project format
*.iws

我合并Github .gitignore文件

Android.gitignore JetBrains.gitignore

### Github Android.gitignore ### 

# Built application files
*.apk
*.ap_

# Files for the Dalvik VM
*.dex

# Java class files
*.class

# Generated files
bin/
gen/

# 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/

### Github JetBrains.gitignore ### 

# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio

*.iml

## Directory-based project format:
.idea/
# if you remove the above rule, at least ignore the following:

# User-specific stuff:
# .idea/workspace.xml
# .idea/tasks.xml
# .idea/dictionaries

# Sensitive or high-churn files:
# .idea/dataSources.ids
# .idea/dataSources.xml
# .idea/sqlDataSources.xml
# .idea/dynamic.xml
# .idea/uiDesigner.xml

# Gradle:
# .idea/gradle.xml
# .idea/libraries

# Mongo Explorer plugin:
# .idea/mongoSettings.xml

## File-based project format:
*.ipr
*.iws

## Plugin-specific files:

# IntelliJ
/out/

# mpeltonen/sbt-idea plugin
.idea_modules/

# JIRA plugin
atlassian-ide-plugin.xml

# Crashlytics plugin (for Android Studio and IntelliJ)
com_crashlytics_export_strings.xml
crashlytics.properties
crashlytics-build.properties

请阅读:JetBrains支持:如何在版本控制系统下管理项目