MyWidget.java

package com.example.mywidget;

import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.view.View;
import android.widget.RemoteViews;

public class MyWidget extends AppWidgetProvider {

  public static final String BTN_CLICKED = "buttonClick";
	public static final String BTN_READY = "buttonReady";

	@Override
	public void onUpdate(Context context, AppWidgetManager appWidgetManager,
			int[] appWidgetIds) {
		RemoteViews remoteViews;
		ComponentName watchWidget;

		remoteViews = new RemoteViews(context.getPackageName(),
				R.layout.my_layout);
		watchWidget = new ComponentName(context, MyWidget.class);

		Intent intent = new Intent(context, getClass());
		intent.setAction(BTN_CLICKED);
		remoteViews.setOnClickPendingIntent(R.id.button,
				PendingIntent.getBroadcast(context, 0, intent, 0));
		appWidgetManager.updateAppWidget(watchWidget, remoteViews);
	}

	@Override
	public void onReceive(Context context, Intent intent) {
		// TODO Auto-generated method stub
		super.onReceive(context, intent);

		if (BTN_CLICKED.equals(intent.getAction())) {
			context.startService(new Intent(context, WidgetService.class));

			AppWidgetManager appWidgetManager = AppWidgetManager
					.getInstance(context);
			RemoteViews remoteViews;
			ComponentName watchWidget;
			remoteViews = new RemoteViews(context.getPackageName(),
					R.layout.my_layout);
			watchWidget = new ComponentName(context, MyWidget.class);
      
			remoteViews.setViewVisibility(R.id.button, View.GONE);
			remoteViews.setViewVisibility(R.id.progressBar, View.VISIBLE);

			appWidgetManager.updateAppWidget(watchWidget, remoteViews);
		}
		if (BTN_READY.equals(intent.getAction())) {
			AppWidgetManager appWidgetManager = AppWidgetManager
					.getInstance(context);
			RemoteViews remoteViews;
			ComponentName watchWidget;
			remoteViews = new RemoteViews(context.getPackageName(),
					R.layout.my_layout);
			watchWidget = new ComponentName(context, MyWidget.class);
      
			remoteViews.setViewVisibility(R.id.button, View.VISIBLE);
			remoteViews.setViewVisibility(R.id.progressBar, View.GONE);

			appWidgetManager.updateAppWidget(watchWidget, remoteViews);
		}
	}

}