Download and unpack the Android SDK, move it to your home folder. I prefer to set a point in front of the directory folder to make it be hidden so that my home directoy still looks tidy: .android-sdk-linux. Then add this to your path:

export PATH=${PATH}:~/.android-sdk-linux/tools:~/.android-sdk-linux/platform-tools

.android-sdk-tools is for running android command, and .android-sdk-tools/platform-tools is for running adb command And add it to your .bashrc-file so that this path is loaded automatically when you log on.