如何在build.gradle中获取资源值? [英] How to get a resource value in build.gradle?

问题描述

resValue方法(或任何称为它的方法)使您可以设置在buildTypes或productFlavors中的资源值. 是否有相应的方法来获取由resValue设置的资源值?

The resValue method (or whatever it's called) allows you to set a resource value in buildTypes or productFlavors. Is there a corresponding way to get a resource value that was set by resValue?

看来productFlavors在buildTypes之前被求值，所以在buildTypes中设置的resValue优先.我想在调试版本中将"Debug"附加到应用程序名称中，但是我需要获取在产品风格中设置的值才能附加到它.

It appears that productFlavors is evaluated before buildTypes, so a resValue set in buildTypes takes precedence. I want to append "Debug" to the app name in debug builds, but I need to get the value that was set in the product flavor in order to append to it.

我尝试了MarcinKoziński的建议使用变量，但在 any 构建类型之前先评估了 all 产品风味.因此，这不起作用:

I tried Marcin Koziński's suggestion to use a variable, but all product flavors are evaluated before any build type. Therefore, this does not work:

android {
    String appName = ""

    productFlavors {
        Foo {
            appName = "Foo"
        }

        Bar {
            appName = "Bar"
        }
    }

    buildTypes {
        release {
            resValue "string", "app_name", appName 
        }

        debug {
            resValue "string", "app_name", appName + " Debug"
        }
    }
}

在buildTypes中，appName始终具有来自 last 产品风味的值.因此，在此示例中，所有内部版本均使用名称"Bar"或"Bar Debug".

In buildTypes, appName always has the value from the last product flavor. So in this example, all builds receive the name "Bar" or "Bar Debug".

基本上，我需要一个类似于applicationIdSuffix的resValueSuffix.显然不存在这种动物. com.android.application插件是否公开了我可以用来实现这一目标的任何东西?

Basically, I need a resValueSuffix analogous to applicationIdSuffix. Apparently no such animal exists. Does the com.android.application plugin expose anything that I could use to achieve this?

推荐答案

如果仅尝试设置应用标签(或其他清单值)，则可以使用

If you are only trying to set the App Label (or other manifest values) you can solve this with manifest placeholders.

android {

    productFlavors {
        Foo {
             applicationId "com.myexample.foo"
             manifestPlaceholders.appName = "Foo"
        }

        Bar {
             applicationId "com.myexample.bar"
             manifestPlaceholders.appName = "Bar"
        }
    }

    buildTypes {
        release {
            manifestPlaceholders.appNameSuffix =""
        }

        debug {
            manifestPlaceholders.appNameSuffix =".Debug"
            applicationIdSuffix ".debug"
        }
    }
}

然后，在您的Android清单中，您只需将两个占位符都用作您的应用名称(或其他值)

Then in your Android Manifest you simply use both placeholders for your app name (or other values)

 <application
        android:label="${appName}${appNameSuffix}"
        ...
 </application>

这允许您将所有4个变体并排安装在单个设备上，并在应用程序抽屉/启动器中为它们指定不同的名称.

This allow you to install all 4 variants side by side on a single device as well as give them different names in the app drawer / launcher.

编辑，2019年11月22日

EDIT 11/22/2019

根据来自@javaxian的反馈更新了如何设置占位符值

Updated how placeholders values are set based on feedback from @javaxian

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