Kueue is an android app that lets you add tracks directly to the Spotify Queue.
Fire up a terminal and type the following command :
git clone https://github.com/pramodbhadana/Kueue.git
or
Open Android Studio
Go to File --> New --> Project from Version Control --> Github
Enter https://github.com/pramodbhadana/Kueue.git into the Git Repository URL field, follow other instructions and you are good to go.
Register an app and generate a client ID at https://developer.spotify.com/dashboard/login
Add an empty text file : /app/src/main/assets/privateKeys.txt
Add your secret API keys here. The client ID generated in step one goes here :
spotify_client_id = your_spotify_client_id