MiWidget.java

package net.sgoliver.android.widgets;

import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;

public class MiWidget extends AppWidgetProvider {
	@Override
    public void onUpdate(Context context,
                 AppWidgetManager appWidgetManager,
                 int[] appWidgetIds) {
        //Actualizar el widget
        //...
    }
}