rk35xx-android12/developers/samples/android/ui/lists/CustomChoiceList

Android CustomChoiceList Sample

This sample demonstrates how to create custom checkable layouts, for use with ListView's choiceMode attribute.

Introduction

This sample demonstrates how to create custom single- or multi-choice ListView UIs on Android.

When a ListView has a android:choiceMode attribute set, it will allow users to "choose" one or more items. For exmaple, refer to res/layout/sample_main.xml in this project:

<ListView android:id="@android:id/list"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1"
    android:paddingLeft="@dimen/page_margin"
    android:paddingRight="@dimen/page_margin"
    android:scrollbarStyle="outsideOverlay"
    android:choiceMode="multipleChoice" />

The framework provides these default list item layouts that show standard radio buttons or check boxes next to a single line of text:

• android.R.layout.simple_list_item_single_choice
• android.R.layout.simple_list_item_multiple_choice.

In some cases, you may want to customize this layout. When doing so, the root view must implement the Checkable interface. For an example, see this sample's CheckableLinearLayout class.

Lastly, remember to use padding on your ListViews to adhere to the standard metrics described in the Android Design guidelines. When doing so, you should set the android:scrollbarStyle attribute such that the scrollbar doesn't inset.

Pre-requisites

• Android SDK 28
• Android Build Tools v28.0.3
• Android Support Repository

Screenshots

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-CustomChoiceList

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 2019 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.