轻松入门Android编程：HeadFirst指南

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"这是一本名为《HeadFirst Android Development》的Android编程入门教程，作者是Jonathan Simon，由O'Reilly Media, Inc.出版。该书旨在以轻松、吸引人的方式帮助初学者快速掌握Android开发，避免枯燥的API手册学习方式。" 在Android编程的世界里，这本书提供了理想的学习路径，特别是对那些编程新手来说。它通过独特的HeadFirst教学方法，将复杂的概念以易于理解的方式呈现，使读者在享受阅读的过程中不断提升技能。作者Jonathan Simon试图打破传统的技术书籍模式，创建一个既有趣又能深入传授专业知识的教程。书中涵盖了Android开发的基础到高级主题，包括但不限于环境设置、Android应用程序的基本结构、用户界面设计、活动管理、数据存储、网络通信、多线程、传感器集成以及Google Play服务的使用等。每个主题都以易于消化的形式展开，比如使用丰富的插图、幽默的故事、记忆技巧和互动练习，以激发读者的兴趣和参与度。此外，本书还可能涉及了Android Studio的使用，这是目前官方推荐的Android开发集成开发环境（IDE），以及如何使用Gradle构建系统进行项目管理和依赖管理。书中也可能会介绍Android SDK中的重要工具，如AVD Manager（Android虚拟设备管理器）用于测试不同版本的Android系统，以及调试工具的使用。在实际应用方面，读者会学习如何创建自己的第一个Android应用，从布局设计到实现基本的用户交互。随着学习的深入，他们将掌握如何使用Intent进行应用间的通信，处理触摸事件，以及实现自定义视图和动画效果。《HeadFirst Android Development》不仅教授技术知识，还培养解决问题和创新思考的能力，对于想要进入Android开发领域的初学者来说，无疑是一份宝贵的资源。这本书的实践导向和寓教于乐的风格，使得即使是复杂的编程概念也能变得生动有趣，帮助读者迅速建立起坚实的Android开发基础。

xvi intro

how to use this book

Here’s what WE did:

We used pictures, because your brain is tuned for visuals, not text. As far as your brain’s

concerned, a picture really is worth a thousand words. And when text and pictures work

together, we embedded the text in the pictures because your brain works more effectively

when the text is within the thing the text refers to, as opposed to in a caption or buried in the

text somewhere.

We used redundancy, saying the same thing in different ways and with different media types,

and multiple senses, to increase the chance that the content gets coded into more than one area

of your brain.

We used concepts and pictures in unexpected ways because your brain is tuned for novelty,

and we used pictures and ideas with at least some emotional content, because your brain

is tuned to pay attention to the biochemistry of emotions. That which causes you to feel

something is more likely to be remembered, even if that feeling is nothing more than a little

humor, surprise, or interest.

We used a personalized, conversational style, because your brain is tuned to pay more

attention when it believes you’re in a conversation than if it thinks you’re passively listening

to a presentation. Your brain does this even when you’re reading.

We included more than 80 activities, because your brain is tuned to learn and remember

more when you do things than when you read about things. And we made the exercises

challenging-yet-do-able, because that’s what most people prefer.

We used multiple learning styles, because you might prefer step-by-step procedures, while

someone else wants to understand the big picture first, and someone else just wants to see

an example. But regardless of your own learning preference, everyone benefits from seeing the

same content represented in multiple ways.

We include content for both sides of your brain, because the more of your brain you

engage, the more likely you are to learn and remember, and the longer you can stay focused.

Since working one side of the brain often means giving the other side a chance to rest, you

can be more productive at learning for a longer period of time.

And we included stories and exercises that present more than one point of view,

because your brain is tuned to learn more deeply when it’s forced to make evaluations and

judgments.

We included challenges, with exercises, and by asking questions that don’t always have

a straight answer, because your brain is tuned to learn and remember when it has to work at

something. Think about it—you can’t get your body in shape just by watching people at the

gym. But we did our best to make sure that when you’re working hard, it’s on the right things.

That you’re not spending one extra dendrite processing a hard-to-understand example,

or parsing difficult, jargon-laden, or overly terse text.

We used people. In stories, examples, pictures, etc., because, well, because you’re a person.

And your brain pays more attention to people than it does to things.

you are here 4 xvii

the intro

So, we did our part. The rest is up to you. These tips are a

starting point; listen to your brain and figure out what works

for you and what doesn’t. Try new things.

Drink water. Lots of it.

Your brain works best in a nice bath of fluid.

Dehydration (which can happen before you ever

feel thirsty) decreases cognitive function.

Get your hands dirty!

There’s only one way to learn to Android: get

your hands dirty. And that’s what you’re going to

do throughout this book. Android Development

is a skill, and the only way to get good at it is to

practice. We’re going to give you a lot of practice:

every chapter has exercises that pose a problem for

you to solve. Don’t just skip over them—a lot of the

learning happens when you solve the exercises. We

included a solution to each exercise—don’t be afraid

to peek at the solution if you get stuck! (It’s easy to

get snagged on something small.) But try to solve

the problem before you look at the solution. And

definitely get it working before you move on to the

next part of the book.

Feel something.

Your brain needs to know that this matters. Get

involved with the stories. Make up your own

captions for the photos. Groaning over a bad joke

is still better than feeling nothing at all.

Listen to your brain.

Pay attention to whether your brain is getting

overloaded. If you find yourself starting to skim

the surface or forget what you just read, it’s time

for a break. Once you go past a certain point, you

won’t learn faster by trying to shove more in, and

you might even hurt the process.

Talk about it. Out loud.

Speaking activates a different part of the brain. If

you’re trying to understand something, or increase

your chance of remembering it later, say it out loud.

Better still, try to explain it out loud to someone else.

You’ll learn more quickly, and you might uncover

ideas you hadn’t known were there when you were

reading about it.

Make this the last thing you read before bed.

Or at least the last challenging thing.

Part of the learning (especially the transfer to

long-term memory) happens

after

you put the book

down. Your brain needs time on its own, to do more

processing. If you put in something new during that

processing time, some of what you just learned will

be lost.

Read the “There are No Dumb Questions”

That means all of them. They’re not optional

sidebars, they’re part of the core content!

Don’t skip them.

Cut this out and stick

it on your refrigerator.

Here’s what YOU can do to bend

your brain into submission

Do the exercises. Write your own notes.

We put them in, but if we did them for you, that

would be like having someone else do your workouts

for you. And don’t just look at the exercises. Use a

pencil. There’s plenty of evidence that physical

activity

while

learning can increase the learning.

Don’t just read. Stop and think. When the book asks

you a question, don’t just skip to the answer. Imagine

that someone really is asking the question. The

more deeply you force your brain to think, the better

chance you have of learning and remembering.

Slow down. The more you understand, the

less you have to memorize.

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