ListView Alternate colors

I need to make a ListView with alternate color.

code:

public View getView(int position, View convertView, ViewGroup parent) {

  if(position %2==0)
  {
      view.setBackgroundColor(Color.BLUE);
  }
  return view;
}

but I don't know how to use it in my Adapter:

SimpleAdapter adapter = new SimpleAdapter(this, propositions, android.R.layout.simple_list_item_2,
    new String[] {"Date", "Trajet"},
    new int[] { android.R.id.text1, 
    android.R.id.text2});
lvTrajets.setAdapter(adapter);

Can someone help me about how to do this please ?

Override getView for the adapter

SimpleAdapter adapter = new SimpleAdapter(this, propositions, android.R.layout.simple_list_item_2,
new String[] {"Date", "Trajet"},
new int[] { android.R.id.text1, 
android.R.id.text2})
    {
        @Override
        public View getView (int position, View convertView, ViewGroup parent)
        {
            View v = super.getView(position, convertView, parent);
             if(position %2==0)
             {
                  v.setBackgroundColor(Color.BLUE);
             }
             else
             {
                  v.setBackgroundColor(Color.WHITE);
             }

            return v;
        }


    };