这是一个使用Material Design设计的演示应用程序。 它是使用创建的。 Google Play: 开源许可证: Copyright 2018 Eajy Licensed under the Apache License, Version 2.0. 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 b