Clickable widgets in android

Solution 1:

First, add a static variable with a constant.

public static String YOUR_AWESOME_ACTION = "YourAwesomeAction";

Then you need to add the action to the intent before you add the intent to the pending intent:

Intent intent = new Intent(context, widget.class);
intent.setAction(YOUR_AWESOME_ACTION);

(Where widget.class is the class of your AppWidgetProvider, your current class)

You then need to create a PendingIntent with getBroadcast

PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);

Set the onClickPendingIntent for the clickable view in your widget

remoteView.setOnClickPendingIntent(R.id.widgetFrameLayout, pendingIntent);

Next, override the onReceive method in the same class:

@Override
public void onReceive(Context context, Intent intent) {
 super.onReceive(context, intent);

And then respond to your button presses by querying the intent returned for your action within the onReceive method:

if (intent.getAction().equals(YOUR_AWESOME_ACTION)) {
   //do some really cool stuff here
}

And that should do it!

Solution 2:

Leave the onUpdate method as it was and copy-paste the logic to updateAppWidget.

static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
                            int appWidgetId) {

    // Create an Intent to launch ExampleActivity when clicked
    Intent intent = new Intent(context, ExampleActivity.class);
    PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
    // Construct the RemoteViews object
    RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.appwidget_provider_layout);
    // Widgets allow click handlers to only launch pending intents
    views.setOnClickPendingIntent(R.id.button, pendingIntent);
    // Instruct the widget manager to update the widget
    appWidgetManager.updateAppWidget(appWidgetId, views);
}

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
    // There may be multiple widgets active, so update all of them
    for (int appWidgetId : appWidgetIds) {
        updateAppWidget(context, appWidgetManager, appWidgetId);
    }
}

PS. PendingIntent is just "box" for an Intent, that allows other applications to have access and run that Intent in your application.