Can't get it to work within an Android App about riot-api-java HOT 3 CLOSED

public class MainActivity extends Activity{

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final Button button = (Button) findViewById(R.id.button1);
        button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                FetchSummonerTask summonerTask = new FetchSummonerTask();
                summonerTask.execute("summoner name");
            }
        });

    }

    public class FetchSummonerTask extends AsyncTask<String, Void, Summoner> {

        @Override
        protected Summoner doInBackground(String... params) {

            RiotApi api = new RiotApi(
                    "API-KEY");
            try {
                api.setRegion(Region.EUW);
                Map<String, Summoner> summoners = api.getSummonerByName(params[0]);
                if(summoners != null) {
                    return summoners.get(params[0].replaceAll("\\s+", "").toLowerCase());
                }
            } catch (RiotApiException e) {
                e.printStackTrace();
            }

            return null;
        }

        @Override
        protected void onPostExecute(Summoner result) {
            super.onPostExecute(result);
            if(result != null) {
                TextView dis = (TextView) findViewById(R.id.textView1);
                dis.setText(String.valueOf((result.getSummonerLevel())));
            }
        }
    }
}

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;
    }

}

 protected Summoner doInBackground(String... params) {

                try {
                    Summoner summoner = ((GlobalClass)getActivity().getApplication()).getApi()
                            .getSummonerByName(params[0])
                            .get(params[0].replaceAll("\\s+", "").toLowerCase());
                    if(summoner != null) {
                        return summoner;
                    }
                } catch (RiotApiException e) {
                    e.printStackTrace();
                }

                return null;
            }