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9.6K Stars 2.1K Forks Apache License 2.0 383 Commits 178 Opened issues


Android library to observe scroll events on scrollable views.

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Android library to observe scroll events on scrollable views.
It's easy to interact with the Toolbar introduced in Android 5.0 Lollipop and may be helpful to implement look and feel of Material Design apps.


Download from Google Play

Get it on Google Play

Please note that the app on the Play store is not always the latest version.

Download from wercker

If you are a wercker user, you can download the latest build artifact.
See here for details.

wercker status

Install manually

Just clone and execute

task with Gradle.
See here for details.


  1. Add
    to your
  2. Add
    or other views you'd like to use.
  3. Write some animation codes to the callbacks such as
    , etc.

See the quick start guide for details, and the documentation for further more.


Apps that use this library


If you're using this library in your app and you'd like to list it here,
please let me know via email or pull requests or issues.


Any contributions are welcome!
Please check the FAQ and contributing guideline before submitting a new issue.

Developed By



Copyright 2014 Soichiro Kashima

Licensed 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

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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