Using riot-api-java within Android app.

GlobalClass.java

import android.app.Application;
import main.java.riotapi.RiotApi;

public class GlobalClass extends Application {

    private RiotApi api;

    public GlobalClass() {
        this.api = new RiotApi("API-KEY");
    }

    public RiotApi getApi() {
        return api;
    }

}

"Note that embedding a key in a distributed client application, like a desktop or mobile application, means that your key can be compromised. Even secure storage or encrypted keys on a client can be breached. The only way to ensure your API key remains safe is to have the client application access your own server, which then makes the appropriate request to the API using HTTPS." For more information go here: https://developer.riotgames.com/discussion/riot-games-api/show/oomYkEK4