Initialization:
...
public void refresh(){
    this.adapter = new ListViewAdapter(this, this.list, R.layout.listview_row);
    setListAdapter(this.adapter);
    this.adapter.notifyDataSetChanged();
}
...


...

Adapter:

package org.rudolf_kremsner.projects.calli.activities.helpers;

import java.util.ArrayList;
import java.util.List;
import java.util.zip.Inflater;

import org.rudolf_kremsner.projects.calli.R;
import org.rudolf_kremsner.projects.calli.calendar.mvc.CalendarEvent;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

public class ListViewAdapter extends ArrayAdapter<CalendarEvent> {

    private List<CalendarEvent> events;


    public ListViewAdapter(Context context, ArrayList<CalendarEvent> list, int resource) {
        super(context, resource);
        this.events = (List<CalendarEvent>) list;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view = super.getView(position, convertView, parent);

        CalendarEvent event = events.get(position);
        if(event != null)
            if(event.isToday()){
                TextView tv = (TextView)view.findViewById(R.id.event_name);
                tv.setTextColor(AdapterConstants.TODAY_TEXT_COLOR);
                tv.setText("Heute");

                tv = (TextView)view.findViewById(R.id.event_time);
                tv.setTextColor(AdapterConstants.TODAY_TEXT_COLOR);
                tv.setText(event.getFromToString());
                view.setBackgroundColor(AdapterConstants.TODAY_BACKGROUND_COLOR);
            }else{
                TextView tv = (TextView)view.findViewById(R.id.event_name);
                tv.setTextColor(AdapterConstants.DEFAULT_TEXT_COLOR);
                tv.setText(event.getSummary());

                tv = (TextView)view.findViewById(R.id.event_time);
                tv.setTextColor(AdapterConstants.DEFAULT_TEXT_COLOR);
                tv.setText(event.getFromToString());
                view.setBackgroundColor(AdapterConstants.DEFAULT_BACKGROUND_COLOR);

            }
        return view;
    }

    @Override
    public boolean isEmpty() {
        if(events.size() == 0)
            return true;
        return false;
    }
}