Android : 'Cannot resolve a value from a method with a void result type' when returning HashMap

So in this class(DataProvider) is data for a ExpanableList. The app is not running correctly and I think it's due to the DataProvider not returning Hashmap. Whenever I try to return the Hashmap(return moviesDetails;) it gives me the error: 'Cannot resolve a value from a method with a void result type' even though there is clearly no void in my class. If someone can clear this up for me, I'd appreciate it.

DataProvider:

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class DataProvider {
public static HashMap<String, List<String>> getInfo;
    HashMap<String, List<String>> moviesDetails = new HashMap<String, List<String>>();

List<String> actionMovies;
    List<String> romanticMovies;
    List<String> horrorMovies;
    List<String> comedyMovies;


public DataProvider() {

    actionMovies = new ArrayList<String>();
    actionMovies.add("Test1");
    romanticMovies = new ArrayList<String>();
    romanticMovies.add("Test2");
    horrorMovies = new ArrayList<String>();
    horrorMovies.add("Test3");
    comedyMovies = new ArrayList<String>();
    comedyMovies.add("Test4");




     moviesDetails.put("Test1", actionMovies);
            moviesDetails.put("Test2", romanticMovies);
            moviesDetails.put("Test3", horrorMovies);
            moviesDetails.put("Test4", comedyMovies);

//this is the error
return moviesDetails;


}

}

MainActivity:

import android.app.Activity;
import android.os.Bundle;
import android.widget.ExpandableListView;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;


public class MainActivity extends Activity {
HashMap<String, List<String>> Movies_categories;
    List<String> Movies_list;
    ExpandableListView Exp_list;
    MoviesAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Exp_list = (ExpandableListView) findViewById(R.id.exp_list);
        Movies_categories = DataProvider.getInfo;
        Movies_list = new ArrayList<String>(Movies_categories.keySet());
        adapter = new MoviesAdapter(this, Movies_categories, Movies_list);
        Exp_list.setAdapter(adapter);







    }
}