81 lines
3.1 KiB
Markdown
81 lines
3.1 KiB
Markdown
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Android CustomTransition Sample
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===================================
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This sample shows how to implement a custom Transition extending the
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standard Transition class.
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Introduction
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------------
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In order to create a custom Transition, you first need to override
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[captureStartValues][1] and [captureEndValues][2]. In those method, you have to
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extract all the relevant properties from a View. These methods are called for
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each of the Views in the hierarchy.
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Then, you need to override [createAnimator][3] and create an Animator based on
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the property values you extracted. This method will also be called for each of
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the Views in the hierarchy. If you want to skip some Views, simply return null.
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The instantiated custom Transition can be applied by passing it as the second
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parameter of [TransitionManager.go][4].
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```java
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TransitionManager.go(mScenes[mCurrentScene], mTransition);
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```
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[1]: https://developer.android.com/reference/android/transition/Transition.html#captureStartValues(android.transition.TransitionValues)
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[2]: https://developer.android.com/reference/android/transition/Transition.html#captureEndValues(android.transition.TransitionValues)
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[3]: https://developer.android.com/reference/android/transition/Transition.html#createAnimator(android.view.ViewGroup, android.transition.TransitionValues, android.transition.TransitionValues)
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[4]: https://developer.android.com/reference/android/transition/TransitionManager.html#go(android.transition.Scene, android.transition.Transition)
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Pre-requisites
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--------------
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- Android SDK 27
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- Android Build Tools v27.0.2
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- Android Support Repository
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Screenshots
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-------------
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<img src="screenshots/main.png" height="400" alt="Screenshot"/>
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Getting Started
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---------------
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This sample uses the Gradle build system. To build this project, use the
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"gradlew build" command or use "Import Project" in Android Studio.
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Support
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-------
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- Google+ Community: https://plus.google.com/communities/105153134372062985968
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- Stack Overflow: http://stackoverflow.com/questions/tagged/android
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If you've found an error in this sample, please file an issue:
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https://github.com/googlesamples/android-CustomTransition
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Patches are encouraged, and may be submitted by forking this project and
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submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
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License
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-------
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Copyright 2017 The Android Open Source Project, Inc.
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Licensed to the Apache Software Foundation (ASF) under one or more contributor
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license agreements. See the NOTICE file distributed with this work for
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additional information regarding copyright ownership. The ASF licenses this
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file to you under the Apache License, Version 2.0 (the "License"); you may not
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use this file except in compliance with the License. You may obtain a copy of
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the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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License for the specific language governing permissions and limitations under
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the License.
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