I have Mac OS Catalina (version 10.15.7) and I observed that none of the commands are working in my terminal. Tried following commands:
$ java -version
-bash: java: command not found
$ touch ~.bash_profile
-bash: touch: command not found
A few corrections:
1) You don't need to export PATH multiple times. One is enough.
2) These commands are resetting PATH and annuling all the previous ones:
PATH=$ANDROID_HOME/build-tools
PATH=$ANDROID_HOME/platform-tools
PATH=$ANDROID_HOME/tools
You can do more than one at a time, but don't forget to concatenate with the previous value of PATH.
For example, these three could become
PATH=$ANDROID_HOME/build-tools:$ANDROID_HOME/platform-tools:$ANDROID_HOME/tools:$PATH
This adds these three directories at the head of the PATH.
If you omit the final :$PATH, then the previous value of PATH is discarded.
3) Same thing here, add :$PATH at the end
# Setting PATH for Appium
PATH="/usr/local/lib/node_modules/appium"
export PATH
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
export PATH
4) These are duplicates, delete one of them.
# Setting PATH for Python 3.9
# The original version is saved in .bash_profile.pysave
PATH="/Library/Frameworks/Python.framework/Versions/3.9/bin:${PATH}"
export PATH
# Setting PATH for Python 3.9
# The original version is saved in .bash_profile.pysave
PATH="/Library/Frameworks/Python.framework/Versions/3.9/bin:${PATH}"
export PATH
What Bob Harris said about your PATH environment variable. If you are still using the Bash shell, then you want the PATH export statement in the $HOME/.bash_profile. If you switched to the zsh shell in Catalina, then it will not read your .bash_profile to get the PATH, and you need to create a $HOME/.zshrc file with the PATH statement in it.
In either case,
export PATH=".:/usr/local/bin:$PATH"
and after you have saved the dot file, you can make the PATH current by the respective shell:
source ~/.bash_profile
source ~/.zshrc
Afterward, your Java -version result will be useless until you have installed a current and compatible version of Java from Oracle. I would not recommend this unless you have an explicit purpose that requires Java.
A single
export PATH
at the end is enough.
I don't know where adb is located, but I am assuming it is somewhere that is not in the PATH.
I would expect it to be somewhere that Android Studio could find it.
You can try this in the Terminal:
find /usr $ANDROID_HOME -name 'adb'
The OP is already using bash.
None of the commands are working in my Terminal