การ query แสดงข้อมูลในโค๊ด Android Studio ทำยังไงคะ

package com.delivery.user.deliveryman;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;
import android.widget.TextView;


public class HeadMainActivity extends Activity {

    ConnectionClass connectionClass;
    TextView staffid, staffname, logout;
    ListView listView;
    SharedPreferences shp;





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

        connectionClass = new ConnectionClass();
        staffid = (TextView) findViewById(R.id.staffid);
        staffname = (TextView) findViewById(R.id.staffname);
        logout = (TextView) findViewById(R.id.logout);

        logout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent gotoLogin = new Intent(HeadMainActivity.this, SigninActivity.class);
                startActivity(gotoLogin);
                finish();
            }
        });

        shp = this.getSharedPreferences("UserInfo", MODE_PRIVATE);

        String userid = shp.getString("UserId", "none");
        String password = shp.getString("UserPass", "none");
        String COL_NAME = shp.getString("LocalName", "none");


            SharedPreferences.Editor edit = shp.edit();
            edit.commit();
            staffid.setText(userid);
            staffname.setText(COL_NAME);


        }

}