精通Android Material Design：打造精美界面

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"Learning Material Design" 是一本关于Android Material Design开发的学习资料，旨在帮助读者掌握Material Design，并能创建美观、动态的移动和网页应用界面。 Android Material Design是Google推出的一种设计语言，它强调了深度、动画和响应式交互，旨在提供一致、直观且富有表现力的用户体验。这一设计系统广泛应用于Android应用开发，同时也支持跨平台的设计，包括Web和iOS等。本书由Kyle Mew编写，他可能是UI/UX设计领域的专家，通过这本书，读者可以学习到以下关键知识点： 1. **Material Design基础**：了解Material Design的核心原则，如色彩系统、类型层次、布局网格、触觉反馈和动效等。理解这些基本元素如何协同工作以创建一致的视觉效果和用户体验。 2. **组件和控件**：学习使用Button、TextInput、CardView、Snackbar、Dialogs等Material Design组件。理解如何在应用中正确使用这些元素以实现功能性和美观性的平衡。 3. **动画和过渡**：Material Design强调动画的使用，它们不仅仅是视觉装饰，也是增强用户理解和引导用户行为的关键。学习如何创建和集成各种动效，如触摸反馈、页面过渡和状态变化动画。 4. **响应式设计**：了解如何根据不同的屏幕尺寸和设备方向进行设计，以确保应用在各种设备上都能提供良好的用户体验。 5. **自定义组件**：学习如何根据项目需求定制Material Design组件，以及如何扩展和创建自己的Material Design组件。 6. **Material Design库和工具**：熟悉Android Support Library（现为AndroidX）中的Material Components，以及如何利用这些库简化开发流程。同时，了解使用设计工具，如Sketch、Adobe XD或Android Studio内置的设计工具进行Material Design设计。 7. **实例项目**：书中可能包含实际项目案例，让读者通过实践来加深对Material Design的理解，将理论知识应用到真实世界的开发场景中。 8. **最佳实践和设计指南**：学习业界最佳实践，理解如何遵循Google的Material Design指南来提升应用的整体质量。 9. **适配与兼容性**：探讨如何在不同版本的Android系统上实现Material Design的兼容性，以及如何为旧版本的Android设备优化设计。 10. **持续更新与演进**：Material Design是一个不断演进的设计系统，书中可能涵盖最新的Material Design更新，如Material Design 2.0（又称Material Design Lite）的特性。通过阅读《Learning Material Design》，开发者不仅可以提升其Android应用的视觉吸引力，还能深入理解如何利用Material Design提升用户体验，从而创建出更具吸引力和用户友好性的应用。

Preface

[ ix ]

Downloading the color images of this book

We also provide you with a PDF le that has color images of the screenshots/diagrams

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the output. You can download this le from https://www.packtpub.com/sites/

default/files/downloads/LearningMaterialDesign_ColoredImages.pdf

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Getting Started with Material Design

[ 2 ]

Based largely on age-old principles taken from color theory, animation, traditional

print design, and physics, Material Design provides a virtual space where developers

can use surface and light to create meaningful interfaces and movement to design

intuitive user interactions.

This book covers both the design principles and the tools required to create the

elegant and responsive interfaces that have made Material Design so popular and

successful. The journey begins with the Android SDK and Android Studio, which

we will use to build working material UIs for a variety of form factors, ranging from

tiny wearable devices to large at screen TVs. This will provide a solid foundation

for the design principles behind the subject, and how mobile interfaces are dened

using XML and then brought to life with Java.

With the aspects of design covered, the book concludes by exploring the different

guidelines and tools required to build material web apps. There are several subtle

differences in the design rules, and the possible absence of a touch-screen on desktop

computers requires a different approach to user interaction. More signicantly, when

building web pages, we will need to work in HTML, and to implement material, we

will need a tool called Polymer and its associate, Paper Elements.

With the journey outlined, we will begin by taking a quick look at the physical

properties of material, and then we'll dive straight in and produce our rst interface.

To do this, we will need to download and congure Android Studio and SDK

tools, as well as create a device emulator to compile and run our apps on. With our

development environment in place, we can then take a look at the material themes

available as default on recent Android versions.

In this chapter, you will learn how to:

• Understand the physical properties of material

• Install Android Studio

• Configure the Android SDK

• Install Google support libraries

• Create a virtual device

• Set up a real device for development

• Create a hello world app in Android Studio

• Create an Android style with XML

• Customize the material theme

• Apply a material palette

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Chapter 1

[ 3 ]

Material properties

As mentioned in the introduction, material can be thought of as being bound by

physical laws. There are things it can do and things it cannot. It can split apart and

heal again, and change color and shape, but it cannot occupy the same space as

another sheet of material or rotate around two of its axes. We will be dealing with

these properties throughout the book, but it is a good idea to begin with a quick look

at the things material can and can't do.

The third dimension is fundamental when it comes to material. This is what gives

the user the illusion that they are interacting with something more tangible than

a rectangle of light. The illusion is generated by the widening and softening of

shadows beneath material that is closer to the user. Material exists in virtual space,

but a space that, nevertheless, represents the real dimensions of a phone or tablet.

The x axis can be thought of as existing between the top and bottom of the screen,

the y axis between the right and left edges, and the z axis conned to the space

between the back of the handset and the glass of the screen. It is for this reason that

material should not rotate around the x or y axes, as this would break the illusion of

a space inside the phone.

The basic laws of the physics of material are outlined, as follows, in the form of a list:

• All material is 1 dp thick (along the z axis).

• Material is solid, only one sheet can exist in one place at a time and material

cannot pass through other material. For example, if a card needs to move

past another, it must move over it.

• Elevation, or position along the z axis, is portrayed by shadow, with higher

objects having wider, softer shadows.

• The z axis should be used to prompt interaction. For example, an action

button rising up toward the user to demonstrate that it can be used to

perform some action.

• Material does not fold or bend.

• Material cannot appear to rise higher than the screen surface.

• Material can grow and shrink along both x and y axes.

• Material can move along any axis.

• Material can be spontaneously created and destroyed, but this must not be

without movement. The arrivals and departures of material components

must be animated. For example, a card growing from the point that it was

summoned from or sliding off the screen when dismissed.

• A sheet of material can split apart anywhere along the x or y axes, and join

together again with its original partner or with other material.

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