76 lines
2.8 KiB
Markdown
76 lines
2.8 KiB
Markdown
|
|
Android ContentProviderPaging Sample
|
|
===================================
|
|
|
|
This sample demonstrates how to use the ContentProvider with paging support introduced
|
|
in Android O. The ContentProvider now accepts additional arguments for the offset and
|
|
the limit in the query method to support paging instead of fetching all the data in
|
|
a single query method call.
|
|
|
|
Introduction
|
|
------------
|
|
|
|
[ContentProvider][1] and [DocumentsProvider][2] now supports paging instead of fetching the all
|
|
data at once.
|
|
|
|
Starting from Android O, ContentProvider#query(Uri, String[], Bundle, CancellationSignal) and
|
|
DocumentsProvider#query(Uri, String[], Bundle, CancellationSignal) methods are introduced.
|
|
The Bundle accepts the keys for ContentResolver.QUERY_ARG_OFFSET as an starting offset and
|
|
ContentResolver.QUERY_ARG_LIMIT as the number of items included in the returned Cursor object.
|
|
|
|
Similarly, the returned Cursor object now has a Bundle object obtained by Cursor#getExtras().
|
|
The Bundle is able to include data such as the total size of the underlying data set.
|
|
|
|
[1]: https://developer.android.com/reference/android/content/ContentProvider.html
|
|
[2]: https://developer.android.com/reference/android/provider/DocumentsProvider.html
|
|
|
|
Pre-requisites
|
|
--------------
|
|
|
|
- Android SDK 27
|
|
- Android Build Tools v27.0.2
|
|
- Android Support Repository
|
|
|
|
Screenshots
|
|
-------------
|
|
|
|
<img src="screenshots/screenshot-1.png" height="400" alt="Screenshot"/>
|
|
|
|
Getting Started
|
|
---------------
|
|
|
|
This sample uses the Gradle build system. To build this project, use the
|
|
"gradlew build" command or use "Import Project" in Android Studio.
|
|
|
|
Support
|
|
-------
|
|
|
|
- Google+ Community: https://plus.google.com/communities/105153134372062985968
|
|
- Stack Overflow: http://stackoverflow.com/questions/tagged/android
|
|
|
|
If you've found an error in this sample, please file an issue:
|
|
https://github.com/googlesamples/android-ContentProviderPaging
|
|
|
|
Patches are encouraged, and may be submitted by forking this project and
|
|
submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
|
|
|
|
License
|
|
-------
|
|
|
|
Copyright 2017 The Android Open Source Project, 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.
|