http://slumbers99.blogspot.jp/2012/01/eclipse-android-gitignore.html
そのまま使う。毎回調べるよりこっちに残しておいたほうが楽そうなので…
# 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 settings
.classpath
.project
.settings/