blocks|key|4481786|text|我调查了一下google-services插件和json，找到了这个插件的源代码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4481787|首先要做的事情|4481788|由classpath引用的gradle-plugin+google-services只是一个构建时插件！所以它只影响你的应用程序的构建过程，而不是运行时过程！|4481789|这个插件只是一个快速入门的助手，用于在你的应用程序中快速集成Google服务。显然，这个过程有些复杂，而且没有文档记录，所以谷歌应该清楚这个过程的作用。|4481790|事实上，我找到了插件版本com.google.gms的源代码:+Google+-services:1.4.0-beta3，但没有找到任何关于appinvite的具体引用，也没有找到任何用于应用邀请的Google+API！(但可能它只是使用了一个带有项目id的通用API项目，我没有尝试这样做)|4481791|它的作用|4481792|google-services+gradle-plugin在app-module中查找提到的google-services.json文件。然后，它查找由Google+API开发人员控制台生成到google-services.json文件中的已配置设置，如project-id和tracking+id等。从它找到的设置中，Android资源值生成到以下路径：|4481793|$project.buildDir/generated/res/google-services/$variant.dirName/values/values.xml|code-block|syntax|javascript|4481794|例如，对于应用程序的调试构建：|4481795|app/build/generated/res/google-services/debug/values/values.xml|4481796|例如，如果你遵循了GCM教程，JSON文件将包含API项目的id作为以下android-resource：|4481797|<string+name="gcm_defaultSenderId">project-id</string>|4481798|因此，这个插件和JSON文件对于运行或发布你的应用程序并不是必须的，它只是一个快速入门的帮助器，用于生成一些基本的android资源文件，以便更容易地集成特定的Google+API功能。|4481799|请注意，在下面引用的源代码中，谷歌服务插件总是为你的应用程序/build.gradle中定义的每个应用程序变体生成这些android-resource。|4481800|如果你不想这样，你应该在你想要的应用程序中使用那些生成的资源--变体，然后删除其他的。别忘了从app/build.gradle中删除谷歌服务插件应用，否则它将为所有app-variants重新生成。|4481801|它不能做什么|4481802|这个插件和JSON文件不会直接影响你的应用程序的Google功能的内部工作！如果你已经遵循了developer.android.com上关于如何集成GCM或Google+Analytics的旧教程，那么你甚至不需要集成gradle-plugin+google-services或google-services.json文件！|4481803|请注意我在哪里找到了源代码|4481804|在集成了google-services+gradle-plugin之后，在同步您的项目时，Gradle会自动将google-services依赖项下载到类似下面的路径(在Windows上，您可能需要查看Linux的home/.gradle+)：|4481805|C:\Users\user\.gradle\caches\modules-2\files-2.1\com.google.gms\google-services\1.4.0-beta3\f1580f62e3be313eba041ce19b64fd3f44cf8951\google-services-1.4.0-beta3-sources.jar|4481806|如果解压这个jar文件，您会发现两个文件：|4481807|GoogleServicesPlugin.groovy
GoogleServicesTask.java|4481808|其中包含gradle-plugin的纯源代码。|4481809|GoogleServicesPlugin.groovy|4481810|包含应用程序变量的处理和路径的基本定义等。|4481811|GoogleServicesTask.java|4481812|包含实际的任务定义，请查看以下方法以了解其真正的作用：|4481813|@TaskAction
public+void+action()+throws+IOException+{+|4481814|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|20|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|21|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|22|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|23|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|24|8|@]|9|@]|A|$]]|$1|N|3|O|5|P|7|25|8|@]|9|@]|A|$Q|R]]|$1|S|3|T|5|6|7|26|8|@]|9|@]|A|$]]|$1|U|3|V|5|P|7|27|8|@]|9|@]|A|$Q|R]]|$1|W|3|X|5|6|7|28|8|@]|9|@]|A|$]]|$1|Y|3|Z|5|P|7|29|8|@]|9|@]|A|$Q|R]]|$1|10|3|11|5|6|7|2A|8|@]|9|@]|A|$]]|$1|12|3|13|5|6|7|2B|8|@]|9|@]|A|$]]|$1|14|3|15|5|6|7|2C|8|@]|9|@]|A|$]]|$1|16|3|17|5|6|7|2D|8|@]|9|@]|A|$]]|$1|18|3|19|5|6|7|2E|8|@]|9|@]|A|$]]|$1|1A|3|1B|5|6|7|2F|8|@]|9|@]|A|$]]|$1|1C|3|1D|5|6|7|2G|8|@]|9|@]|A|$]]|$1|1E|3|1F|5|P|7|2H|8|@]|9|@]|A|$Q|R]]|$1|1G|3|1H|5|6|7|2I|8|@]|9|@]|A|$]]|$1|1I|3|1J|5|P|7|2J|8|@]|9|@]|A|$Q|R]]|$1|1K|3|1L|5|6|7|2K|8|@]|9|@]|A|$]]|$1|1M|3|1N|5|P|7|2L|8|@]|9|@]|A|$Q|R]]|$1|1O|3|1P|5|6|7|2M|8|@]|9|@]|A|$]]|$1|1Q|3|1R|5|P|7|2N|8|@]|9|@]|A|$Q|R]]|$1|1S|3|1T|5|6|7|2O|8|@]|9|@]|A|$]]|$1|1U|3|1V|5|P|7|2P|8|@]|9|@]|A|$Q|R]]|$1|1W|3|-4|5|6|7|2Q|8|@]|9|@]|A|$]]]|1X|$]]

I investigated a bit regarding the google-services plugin and json and found the sources to this plugin.

<h2>First things first</h2>

The gradle-plugin google-services that is referenced by classpath and with apply is a build-time plugin only! So it only influences the build-process of your app, but not the runtime-process!

This plugin is only meant as a quickstart-helper to integrating Google-services quickly in your app. Obviously, the process is somewhat convoluted and not documented, so Google should have made it clear what this process does.

In fact, I found the source code for the plugin version com.google.gms:google-services:1.4.0-beta3 and didnt find any specific reference in it regarding appinvites nor did I find any Google API for App Invites! (But maybe it just uses a generic API project with its project id, I didnt try this)

<h2>What it does</h2>

The google-services gradle-plugin looks for the mentioned google-services.json file in your app-module. Then it looks for configured settings like project-id's and tracking-id's and such, generated by the Google API developer console into the google-services.json file.
From the settings it found, Android resource values are generated into the following path:

<pre><code>$project.buildDir/generated/res/google-services/$variant.dirName/values/values.xml
</code></pre>

For example for a debug-build of your app:

<pre><code>app/build/generated/res/google-services/debug/values/values.xml
</code></pre>

E.g. if you followed the GCM tutorial, the JSON file would include the API project's id as the following android-resource:

<pre><code>&lt;string name="gcm_defaultSenderId"&gt;project-id&lt;/string&gt;
</code></pre>

So this plugin and JSON file are not essential to running or publishing your app, it is just a quickstart helper to generate some basic android-resource files for easier integration of specific Google API features.

Notice in the source code referenced below that the google-services plugin always generates those android-resources for every app-variant that is defined in your app/build.gradle.

If you don't want that, you should use those generated resources in the app-variants you want, and delete the others. Don't forget to remove the google-services plugin apply from app/build.gradle, or else it will be regenerated for all app-variants.

<h2>What it does not</h2>

This plugin and JSON-file do NOT directly influence the inner workings of said Google-features for your app!
If you already have followed older tutorials on developer.android.com on how to integrate e.g. GCM or Google Analytics, then you don't even need to integrate either the gradle-plugin google-services or the google-services.json file!

<h2>Notice about where I found the sources</h2>

After you integrated the google-services gradle-plugin and when sync your project, Gradle automatically downloads the google-services dependency to a path similar to this (on Windows, you might need to look into your home/.gradle for Linux):

<pre><code>C:\Users\user\.gradle\caches\modules-2\files-2.1\com.google.gms\google-services\1.4.0-beta3\f1580f62e3be313eba041ce19b64fd3f44cf8951\google-services-1.4.0-beta3-sources.jar
</code></pre>

If you extract this jar-file, you will find two files:

<pre><code>GoogleServicesPlugin.groovy
GoogleServicesTask.java
</code></pre>

which contain the plain source code of the gradle-plugin.

<pre><code>GoogleServicesPlugin.groovy
</code></pre>

contains the handling of the app-variants and basic definitions of paths etc.

<pre><code>GoogleServicesTask.java
</code></pre>

contains the actual task-definition, look for the following method to see what it really does:

<pre><code>@TaskAction
public void action() throws IOException { 
</code></pre>

blocks|key|4481871|text|将google-services.json添加到您的模块中，并进行清理和A重建。你的项目属性将在app/build/generated/res/google-services/debug/values/values.xml中生成一个xml文件，然后你就可以像普通的xml字符串一样简单地访问它。示例：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4481872|String+serverClientId+=+getString(R.string.default_web_client_id);|code-block|syntax|javascript|4481873|在google-service.json+doc中有一个包含所有字符串和更多信息的列表|offset|length|4481874|entityMap|0|LINK|mutability|MUTABLE|url|https://developers.google.com/android/guides/google-services-plugin^0|0|0|1|N|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Add google-services.json to your module and do a CLEAN and A REBUILD.
A xml file will be generated in app/build/generated/res/google-services/debug/values/values.xml with your project properties and you can easilly access then like normal xml string.
Example:

<pre><code>String serverClientId = getString(R.string.default_web_client_id);
</code></pre>

there is a list with all strings and more info in <a href="https://developers.google.com/android/guides/google-services-plugin" rel="nofollow noreferrer">google-service.json doc</a>

I work on adding Google Analytics and GCM services to my current app. 
On the guide for both services implementation, google asks developer to generate a json file: google-services.json and put it under root directory of the app.

I found that even if I delete this json file from my app, the services still works.

Just want to know for sure, what is this file really for? What its usage and how does it work?

What does google-services.json really do?

Android

Windows

Linux

JSON

我的工作是将谷歌分析和GCM服务添加到我当前的应用程序中。在这两个服务的实现指南中，google要求开发人员生成一个json文件: google-services.json，并将其放在应用程序的根目录下。我发现，即使我从我的应用程序中删除了这个json文件，这些服务仍然可以工作。我只想确定一下，这个文件到底是用来做什么...

问google-services.json到底是做什么的？
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