如何在android Studio中用gradle替换buildvariant的字符串？

Question

flavor1 -> packagename: com.example.flavor1 
flavor2 -> packagename: com.example.flavor2

问题是：如何替换BuildVariant的字符串资源？

我尝试了以下方法（在本文中描述）：

buildTypes{
    flavor1Rev{
        packageName 'com.example.rev.flavor1'
        filter(org.apache.tools.ant.filters.ReplaceTokens, tokens: ['package_permission' : 'com.example.rev.flavor1.permission.MAPS_RECEIVE'])
    }
}

但是使用这个，我得到了这个错误：

<string name="package_permission">package_permission</string>

buildTypes{
    flavor1Rev{
        copy{
            from('src/res/'){
                include '**/*.xml'
                 filter{String line -> line.replaceAll(package_permission, 'com.example.rev.flavor1.permission.MAPS_RECEIVE')}
            }
            into '$buildDir/res'
        }
    }
} 

Answer 1

我自己解决了这个问题，所以这里是“一步一步”的解决方案--也许它会帮助其他一些新手分级：）

>

一般复制任务：

copy{
    from("pathToMyFolder"){
        include "my.file"
    }
    // you have to use a new path for youre modified file
    into("pathToFolderWhereToCopyMyNewFile")
}

一般替换一行：

copy {
   ...
   filter{
       String line -> line.replaceAll("<complete line of regular expression>",
                                      "<complete line of modified expression>")
   }
}

android.applicationVariants.each{ variant -> 
    variant.processManifest.doLast{ 
        copy{
            from("${buildDir}/manifests"){
                include "${variant.dirName}/AndroidManifest.xml"
            }
            into("${buildDir}/manifests/$variant.name")

            // define a variable for your key:
            def gmaps_key = "<your-key>"

            filter{
                String line -> line.replaceAll("<meta-data android:name=\"com.google.android.maps.v2.API_KEY\" android:value=\"\"/>",
                                               "<meta-data android:name=\"com.google.android.maps.v2.API_KEY\" android:value=\"" + gmaps_key + "\"/>")
            }

            // set the path to the modified Manifest:
            variant.processResources.manifestFile = file("${buildDir}/manifests/${variant.name}/${variant.dirName}/AndroidManifest.xml")
        }    
   }
}