Android数据库编程实战教程（2012年）- Jason Wei

4星 · 超过85%的资源需积分: 10 62 浏览量更新于2024-07-27 收藏 3.03MB PDF 举报

《Android Database Programming (2012.6)》是由Jason Wei编写的实用教程，专注于帮助开发者利用数据为中心和数据驱动的Android应用。该书深入探讨了Android数据库编程的相关技术和实践，为读者提供了构建高效、可扩展的Android应用所需的知识和技能。在2012年出版的这本书中，作者Jason Wei以其丰富的经验和深厚的专业知识，引领读者理解Android平台的数据存储机制，包括SQLite（Android的默认本地数据库）以及如何与Content Providers、Cursor和SQLiteOpenHelper等核心组件协同工作。通过本书，开发者可以学习到如何设计数据模型，执行SQL查询，处理事务，以及优化查询性能等关键知识点。此外，书中还涵盖了与数据库相关的最佳实践，如异常处理、数据同步、备份与恢复策略，以及如何在多线程环境中安全地操作数据库。对于那些希望创建具备良好用户体验和数据管理能力的Android应用的开发者而言，这本书是一本不可或缺的参考资料。值得注意的是，版权方面，所有内容未经Packt Publishing事先书面许可，不得进行任何形式的复制、存储或传输，除非用于嵌入在评论或批评文章中。尽管作者和出版社已经尽最大努力确保信息的准确性，但书中提供的信息是“按现状销售”，不提供任何形式的明示或默示保证，且作者、Packt Publishing及其经销商和分销商不对因本书导致或声称导致的任何直接或间接损失负责。最后，Packt Publishing在书中正确地引用了提及的所有公司和产品的商标信息，但并不能保证这些信息的准确性。《Android Database Programming (2012.6)》作为一本专业书籍，旨在为Android开发人员提供一个全面的学习平台，帮助他们在这个快速发展的领域保持竞争力。

Preface

[ 5 ]

Errata

Although we have taken every care to ensure the accuracy of our content, mistakes

do happen. If you nd a mistake in one of our books—maybe a mistake in the

text or the code—we would be grateful if you would report this to us. By doing

so, you can save other readers from frustration and help us improve subsequent

versions of this book. If you nd any errata, please report them by visiting

http://www.packtpub.com/support, selecting your book, clicking on the errata

submission form link, and entering the details of your errata. Once your errata are

veried, your submission will be accepted and the errata will be uploaded to our

website, or added to any list of existing errata, under the Errata section of that title.

Piracy

Piracy of copyright material on the Internet is an ongoing problem across all media.

At Packt, we take the protection of our copyright and licenses very seriously. If you

come across any illegal copies of our works, in any form, on the Internet, please

provide us with the location address or website name immediately so that we can

pursue a remedy.

Please contact us at

pirated material.

We appreciate your help in protecting our authors, and our ability to bring you

valuable content.

Questions

You can contact us at questions@packtpub.com if you are having a problem with

any aspect of the book, and we will do our best to address it.

Chapter 1

[ 9 ]

Here the rst argument simply species which shared preference mapping you

want (each application can own several separate shared preference mappings, and

so, just like you would specify the table name in a database, you must specify which

mapping you want to retrieve). The second argument is a little more complex — in

the example above, we pass in MODE_PRIVATE as the argument and this argument

simply species the visibility of the shared preference instance you are retrieving

(in this case the visibility is set to private, so that only your application can access

the mappings contents). Other modes include:

•

MODE_WORLD_READABLE: Makes the visibility of your map accessible by other

applications, though contents can only be read

•

MODE_WORD_WRITEABLE: Makes the visibility of your map accessible by other

applications for both reading and writing

•

MODE_MULTI_PROCESS: This mode, available since API Level 11, allows you

to modify your map by multiple processes which may be writing to the same

shared preference instance

Now, once we have our shared preference object, we can immediately start

retrieving contents by its various

get() methods — for instance, the getString()

and getBoolean() methods we saw earlier. These get() methods will typically take

two parameters: the rst being the key, and the second being the default value if the

given key is not found. Taking the previous example, we have:

String stringValue = sp.getString("strKey", "error");

boolean booleanValue = sp.getBoolean("boolKey", false);

And so, in the rst case, we're trying to retrieve the string value associated with the

key strKey, and defaulting to the string error if no such key is found. Likewise,

in the second case, we're trying to retrieve a boolean value associated with the key

boolKey, and defaulting to the boolean false if no such key is found.

However, if you want to edit contents or add new content, then you'll have to retrieve

the

Editor object that each shared preference instance contains. This Editor object

contains all of the put() methods which allow you to pass a key along with its

associated value (just like you would for a standard Map object) — the only caveat is

that after you add or update the content of your shared preference, you need to call

the Editor object's commit() method to save down those changes. Furthermore, again,

just like a standard Map object, the Editor class also contains remove() and clear()

methods for you to freely manipulate the contents of your shared preference.

剩余211页未读，继续阅读

天使之梦魇

粉丝: 26
资源: 100

Android数据库编程实战教程（2012年）- Jason Wei

Android.Database.Best.Practices.0134437993

VB.Database.Programming.code.password.rar_vb database

McGraw.Hill.Oracle.Database.11g.PL.SQL.Programming.Mar.2008

import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; 什么意思

import android.database.Cursor 在androidx.appcompat.app.AlertController类中使用代表啥

database-design(java).rar_java programming

Stellar.Phoenix.SQL.Database.Recovery.v.2.0

最新资源