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/libraries
.idea/

Keystore files

*.jks
signing.properties

External native build folder generated in Android Studio 2.2 and later

.externalNativeBuild