在Android工作室中集成第三方库的最佳方式 [英] The best way to integrate third party library in Android studio

问题描述

我们可以找到一些非常好的开源库android。我想知道什么是最好的方式来将它们集成到我们自己的项目在Android工作室。以下是一些基本方法：

• 将源代码和资源文件复制到我们自己的项目中。我们需要更改很多代码（包名称和xml中的名称等）


• 如果提供了jar文件，我只需为我的项目创建libs文件夹，然后复制jar文件内。并在模块设置的依赖关系中添加jar文件。但不幸的是，我收到了很多错误消息，如Gradle：com.google.gson不存在。

一个一般的规则添加第三方源或jar文件到现有的Android工作室项目？感谢

解决方案

我更喜欢使用中央存储库来管理依赖。因此对于 gson 2.3 依赖关系，您应该添加到gradle文件中：

• 指定要为您的依赖关系使用maven中央存储库

  
  
  

  repositories {jcenter（）}




• 添加对 gson 2.6.2 p>



  dependencies {compile'c​​om.google.code.gson：gson：2.6.2'}

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Android Studio以及CI服务器应该可以轻松地构建项目。

我更喜欢使用中央存储库来管理依赖关系，因为：

• 更容易的范围管理 - 一些库只用于测试，一些应该包括到apk，一些是运行环境的一部分（如android.jar本身）


• 如果你使用jar-with-dependencies，你可能会在dexing期间得到class already added的错误。


• / li>
  

示例：

• Robolectric仅用于单元测试，不应该是apk本身的一部分


• 存储库对于jars的不同文件夹是干净的，checkout要少得多。无需使用新的jars下载和替换旧jars

我应该注意到：

• 很少有图书馆在maven中心，你应该努力在项目中使用它们。


• 已添加错误。


• 您可以混合使用中央存储库和lib文件夹中的依赖关系，但我更喜欢使用一种简单方法。

We can find some very good open source libraries for android. I want to know what is the best way to integrate them to our own projects in Android studio. Here are some basic methods:

• Copy the source code and resource files into our own project. We need to change a lot of codes (the package name, and the name in xml,etc)
• If jar files is provided, I just create libs folder for my project and copy the jar files inside. And add the jar file in Module setting's dependencies. But unfortunately I got a lot of error messages like "Gradle: Package com.google.gson doesn't exist".

Is there a general rule to add third party source or jar files into an existing android studio project? Thanks

解决方案

I prefer to use central repository for dependencies management. So for gson 2.3 dependency you should add to gradle file:

• Specify that you want to use maven central repository for your dependency

  repositories {jcenter()}

• Add compile dependency to gson 2.6.2

  dependencies {compile 'com.google.code.gson:gson:2.6.2'}

Android Studio as well as your CI server should easily build your project now. And you can continue app development.

I prefer to use central repository for dependencies management because:

• easier scope management - some libraries are only for testing, some should be included to apk and some are part of running environment (like android.jar itself)
• easier transitive dependencies management - it is quite hard to collect libraries dependencies and if you use "jar-with-dependencies" you could get error "class already added" during dexing
• lighter repository and easier dependency upgrade

Examples:

• Robolectric jar should be used for unit testing only and shouldn't be part of apk itself
• Repository is clean from different folders with jars, checkout takes much less. No needs to download and replace old jars with new jars

I should notice:

• Not many libraries are in maven central and you should make some effort to use them such way in your project
• You could much easier get to "class already added" error during dexing with central repository approach
• You can mix usage of dependencies from central repository and from lib folder, but I prefer to use only one way for simplicity

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