深入实践：Android数据库编程指南

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"Android数据库编程 - Jason Wei" 在移动应用开发领域，尤其是在Android平台上，数据库编程是构建数据驱动型应用的基础。Jason Wei的《Android Database Programming》深入浅出地介绍了如何利用Android系统内置的SQLite数据库来打造高效、稳定的数据存储解决方案。这本书针对Android开发者，旨在帮助他们充分利用数据为中心的应用程序开发的威力。首先，本书会讲解Android中数据库的基本概念，包括SQLite数据库系统的工作原理，它是如何嵌入到Android应用程序中的，以及如何通过SQLiteOpenHelper类来管理数据库的版本和生命周期。SQLiteOpenHelper是一个关键类，它提供创建、升级和打开数据库的方法，确保了数据库操作的正确性。其次，读者将学习如何设计数据库模式，包括创建表、定义字段和约束，以及理解SQL语句，如SELECT、INSERT、UPDATE和DELETE，这些是进行数据查询和修改的基础。书中还会涵盖事务处理，以确保数据的一致性和完整性。此外，Jason Wei还会详细介绍ContentProvider，这是Android中实现数据共享的标准机制。通过ContentProvider，不同的应用程序可以安全地访问和修改其他应用的数据。学习如何创建和使用ContentProvider是提升应用程序互操作性的关键。书中还涵盖了Cursor对象的使用，Cursor是Android中读取数据库查询结果的主要接口。理解如何遍历Cursor并将其数据绑定到UI组件（如ListView）上，对于创建动态和响应式的用户界面至关重要。除了基本操作，Jason Wei还将探讨更高级的主题，如数据库性能优化，包括索引创建、查询优化以及批量插入和更新策略。同时，还会涉及数据备份和恢复，以及如何使用 Room，这是一个现代的、简化版的SQLite数据库库，它提供了更好的抽象层和错误处理。最后，书中可能还会讨论到异步数据库操作，如使用AsyncTask或Loader，以避免阻塞主线程，确保应用程序的流畅运行。这在处理大量数据或长时间运行的数据库操作时尤为重要。《Android Database Programming》是一本全面的指南，涵盖了从基础到进阶的Android数据库编程技术，无论你是初学者还是经验丰富的开发者，都能从中受益，提升你的Android数据库开发技能。通过学习本书，你可以创建更加健壮、功能丰富的数据驱动的Android应用程序。

Preface

[ 5 ]

Errata

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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.

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深入实践：Android数据库编程指南

android-database-sqlcipher-4.4.0+sqlite-2.1.0.zip

android-database-sqlcipher-4.0.1

Android数据库编程实战教程（2012年）- Jason Wei

实战Android数据库编程

精通Android数据库编程

深入探索Android数据库编程

掌握Android数据库编程：实战指南

掌握Android数据驱动应用：实战教程

精通Android数据库开发：打造高效数据应用

实践教程：Android应用的数据库驱动设计

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