模块与包 Android Studio [英] Modules vs Package Android Studio

问题描述

我对 Android Studio 和 Java 非常陌生.

I am very new to Android Studio and Java.

我正在开发应用程序.这个应用程序将基本上遵循分层架构，具有不同的层，例如，UI、数据访问层、服务层等.

I am in the process of developing an app. This app will basically follow a layered architecture, with different layers, for instance, the UI, Data Access Layer, Service layer etc.

我不清楚包和模块之间的区别.

I am not clear on the differences between packages and modules.

我的问题是，将所有这些不同的层放在模块中还是包中?

My question is, where would one put all these different layers, in modules, or packages?

指向@Angel 对 this 问题，两者之间的唯一区别是\，模块定义了更严格的规则，谁可以访问它们，必须导入模块的命名空间.

Pointing to @Angel reponse to this question, the only difference between the two is \, modules define a more strict rule by who can access them, by having to import the namespaces for the modules.

推荐答案

A module 是项目中源代码的容器.一个项目可以有多个模块，但每个模块都是一组独立的代码和资源.

A module is the container for the source code within a project. A single project can have multiple modules, but each module is a separate set of code and resources.

例如，当您使用默认设置创建一个新项目时，Android Studio 会生成一个名为 app 的模块.此模块包含您的应用程序的所有源代码、资源文件和应用级设置.

For instance, when you create a new project with the default settings, Android Studio generates a module called app. This module holds all of the source code, resource files and app-level settings for your application.

但是，如果您使用手机/平板电脑应用程序以及 Android Wear 应用程序创建一个新项目，您将看到两个模块；mobile 和 wear.这些模块中的每一个都包含各自应用程序的源代码、资源文件和应用程序级设置.

But, if you create a new project with a Phone/Tablet application as well as an Android Wear application, you will see two modules; mobile and wear. Each of these modules contain the source code, resource files and app-level settings for their respective application.

您还可以创建另一个模块在多个模块之间共享；此模块将被视为库模块.

You can also create another module to be shared between multiple modules; this module would be considered a library module.

包 是本质上是源代码所属的目录(文件夹).通常，这是一个唯一标识您的应用程序的目录结构；例如 com.example.app.然后你可以在你的应用程序包中创建包来分隔你的代码；例如 com.example.app.ui 或 com.example.app.data.

A package is essentially the directory (folder) to which source code belongs. Normally, this is a directory structure that uniquely identifies your application; such as com.example.app. Then you can create packages within your application package that separates your code; such as com.example.app.ui or com.example.app.data.

因此，为了回答您的问题，每个应用程序的包都位于应用程序模块的 src/main/java 目录中.您可以在应用程序包中放置一个单独的包，以分隔应用程序架构的每个层".

Therefore, to answer your question, the package for each application resides within the src/main/java directory of the application module. You could place a separate package within the application pacakge to separate each "layer" of your application architechture.

仅作为视觉示例，这是我的一个项目的基本结构:

Just for a visual example, this is the basic structure for one of my projects:

project
|-- build.gradle
|-- settings.gradle
~
|-- common // a common library module for both mobile and wear
|   |-- build.gradle
|   |-- proguard-rules.pro
|   +-- src
|       +-- main
|           |-- AndroidManifest.xml
|           |-- assets
|           |-- java
|           |   +-- com
|           |       +-- example
|           |           +-- library // common module library package
|           |               |-- data
|           |               +-- util
|           +-- res
|
|-- mobile // mobile application module
|   |-- build.gradle
|   |-- proguard-rules.pro
|   +-- src
|       +-- main
|           |-- AndroidManifest.xml
|           |-- assets
|           |-- java
|           |   +-- com
|           |       +-- example
|           |           +-- app // mobile module application package
|           |               |-- data
|           |               |-- ui
|           |               +-- util
|           +-- res
|
+-- wear // wear application module
    |-- build.gradle
    |-- proguard-rules.pro
    +-- src
        +-- main
            |-- AndroidManifest.xml
            |-- assets
            |-- java
            |   +-- com
            |       +-- example
            |           +-- app // wear module application package
            |               |-- data
            |               |-- ui
            |               +-- util
            +-- res

这篇关于模块与包 Android Studio的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！