MainActivity

package com.example.provadatabase;

import java.util.List;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;

public class MainActivity extends Activity implements android.view.View.OnClickListener{
    private DataSource db;
    private Button bu;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        MyOpenHelper o=new MyOpenHelper(this);
        db=new DataSource(o);
        db.open();
        bu=(Button) findViewById(R.id.button1);
        bu.setOnClickListener(this);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    public void onClick(View v) {
        // TODO Auto-generated method stub
        List<Coordinate> lista=db.vediCoordinate();
        ListView l=(ListView) findViewById(R.id.listView1);
        ArrayAdapter<Coordinate> a=new ArrayAdapter<Coordinate>(this, android.R.layout.simple_list_item_1,lista);
        l.setAdapter(a);
    }


}