配置adb命令
http://stackoverflow.com/questions/5526470/trying-to-add-adb-to-path-variable-osx
http://stackoverflow.com/questions/19986214/setting-android-home-enviromental-variable-on-mac-os-x
in your terminal, navigate to home directory
cd
create file .bash_profile
touch .bash_profile
open file with TextEdit
open -e .bash_profile
insert line into TextEdit
export PATH=$PATH:/Users/username/Library/Android/sdk/platform-tools/
save file and reload file
source ~/.bash_profile
check if adb was set into path
adb version