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README.md

WordListLoader - Solution Code

Client app for the word list content provider that uses a CursorLoader to load the word list in the background.

Introduction

This is the solution code for Practical 13.1, "Load and display data fetched from a content provider".

In this practical you will learn how to load data provided by another app's content provider in the background and display it to the user, when it is ready. Querying a ContentProvider for data you want to display takes time. If you run the query directly from an activity, it may get blocked and cause the system to issue an "Application Not Responding" message. Even if it doesn't, users will see an annoying delay in the UI. To avoid these problems, you should initiate a query on a separate thread, wait for it to finish, and then display the results. You can do this in a straightforward way by using an object that runs a query asynchronously in the background and reconnects to your activity when it's finished. You do this with a loader, specifically, a CursorLoader. Besides doing the initial background query, a CursorLoader automatically re-runs the query when data associated with the query changes.

Pre-requisites

For this sample you should be familiar with:

  • Displaying data in a RecyclerView
  • Adapters
  • Cursors (see previous practical and concepts)
  • AsyncTaskLoader
  • Content Providers

Getting Started

  1. Download and run this sample.

License

Copyright 2016 Google, Inc.

Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

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