public class MainActivity extends AppCompatActivity implements View.OnClickListener
{
    //Some fields
    ListView lv1;
	//Other fields

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

        Toolbar myToolbar = (Toolbar) findViewById(R.id.my_toolbar);
        setSupportActionBar(myToolbar);
        findViewById(R.id.bgl0).setBackgroundColor(Color.rgb(175, 175, 175));

        //Creating fields


        lv1 = (ListView) findViewById(R.id.custom_list);
        lv1.setBackgroundColor(Color.rgb(175, 175, 175));
        lv1.setLongClickable(true);
        lv1.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener()
        {
            @Override
            public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int pos, long id)
            {
                //WHEN I HOLD AN ITEM, I'D LIKE TO GET ALL THE INFORMATION HERE, BUT THEY ARE INSIDE THE CustomListAdapter
                return true;
            }
        });

       //Setting listeners
	   start();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        getMenuInflater().inflate(R.menu.menu, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item)
    {
        switch (item.getItemId())
        {
            //Setting menu items
        }
    }

    @Override
    public void onClick(View v)
    {
        //Setting buttons
    }


    private void start()
    {
        //Some code
		lv1.setAdapter(new CustomListAdapter(MainActivity.this, myArrayList));
    }

}