export PATH=$PATH:$ANDROID_HOME/platform-tools:$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools/adb:$ANDROID_HOME/build-tools:$JAVA_HOME/bin code example

Example: save android studio home bash_profile

nano ~/.bash_profile 

export ANDROID_HOME=/YOUR_PATH_TO/android-sdk
export PATH=$ANDROID_HOME/platform-tools:$PATH
export PATH=$ANDROID_HOME/tools:$PATH

source ~/.bash_profile
echo $ANDROID_HOME