For the "Family Fortunes" buzzer widget, you click the icon and you'll hear the famous "EURGH-ERRRR" noise.

I'm also selling a "Dramatic Sound Effect" Widget - download it by scanning this code. Go on, it's a mere 50p!

This is a quick tutorial showing how to build a sound playing widget in Android. It assumes you've already set up Eclipse and know how to create your own projects.

The Source Code

Here's the main Java source code - with comments.

package mobi.shkspr.android.ButtonWidget;

import mobi.shkspr.android.ButtonWidget.R;

//All the Androidy bits and bobs you need to import.
import android.media.*;
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.content.Intent;
import android.widget.RemoteViews;

public class ButtonWidget extends AppWidgetProvider {
    public static String ACTION_WIDGET_RECEIVER = "ActionReceiverWidget";

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        //First up, the icon. I've created a file called h_yellow_x.png and placed it in /res/drawable
                int drawableResourse = R.drawable.h_yellow_x;
                //Set Up the widget
        RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget);
                //Set the image which will appear on the screen
        remoteViews.setImageViewResource(R.id.ImageView01, drawableResourse );
        Intent active = new Intent(context, ButtonWidget.class);
        active.setAction(ACTION_WIDGET_RECEIVER);
        PendingIntent actionPendingIntent = PendingIntent.getBroadcast(context, 0, active, 0);
        remoteViews.setOnClickPendingIntent(R.id.ImageView01, actionPendingIntent);
        appWidgetManager.updateAppWidget(appWidgetIds, remoteViews);
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        // v1.5 fix that doesn't call onDelete Action
        final String action = intent.getAction();
        if (AppWidgetManager.ACTION_APPWIDGET_DELETED.equals(action)) {
            //The widget is being deleted off the desktop
            final int appWidgetId = intent.getExtras().getInt(
                    AppWidgetManager.EXTRA_APPWIDGET_ID,
                    AppWidgetManager.INVALID_APPWIDGET_ID);
            if (appWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID) {
                this.onDeleted(context, new int[] { appWidgetId });
            }
        } else {
            // check, if our Action was called
            if (intent.getAction().equals(ACTION_WIDGET_RECEIVER)) {

                //Play the audio file
                                //The audio file is in /res/raw/ and is an OGG file
                MediaPlayer mPlay = MediaPlayer.create(context, R.raw.ff);
                mPlay.start();
            } else {
                // do nothing
            }


            super.onReceive(context, intent);
        }
    }
}

Also

The Manifest

The XML you'll need to get everything configured.

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="mobi.shkspr.android.ButtonWidget"
    android:versionCode="1"
    android:versionName="1.0">

    <application android:icon="@drawable/icon" android:label="@string/app_name">

        <!-- Broadcast Receiver that will process AppWidget updates -->
        <receiver android:name=".ButtonWidget" android:label="@string/app_name">
            <intent -filter>
                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
                <!-- Broadcast Receiver that will also process our self created action -->
                <action android:name="my.package.name.ButtonWidget.ACTION_WIDGET_RECEIVER"/>
            </intent>
            <meta -data android:name="android.appwidget.provider" android:resource="@xml/widget_def" />
        </receiver>

    </application>

    <uses -sdk android:minSdkVersion="3" />
</manifest>