Android Programming Tutorials

More Home Cooking

Figure 59. The app widget with the newly-added button

Step #3: Migrate Update Logic to an IntentService

Right now, we are doing our database I/O right in our AppWidgetProvider

implementation's onUpdate() method. That is probably fine, but if we add

too much logic, we run the risk of timing out, as onUpdate() is called on the

main application thread. Since we can update our app widget

asynchronously without issue, it is safer if we can delegate this work to

something that can be done off the main thread, such as an IntentService.

With that in mind, create an IntentService named WidgetService in the

LunchList project, with the following implementation:

package apt.tutorial;

import android.app.IntentService;

import android.app.PendingIntent;

import android.appwidget.AppWidgetManager;

import android.content.ComponentName;

import android.content.Context;

import android.content.Intent;

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