android 自定义资源id，aapt2，public.xml,支持最新gradle 5.4.1

1.创建public.xml

public.xml

2.创建public-xml.gradle 

工程目录结构：

  

完整public-xml.gradle如下：

import org.gradle.util.GFileUtils
apply plugin: PublicPlugin

class PublicPlugin implements Plugin<Project> {
    void apply(Project project) {
        project.afterEvaluate {
            if (project.plugins.hasPlugin("com.android.application")) {
                def android = project.extensions.getByName("android")
                def aaptOptions = android.aaptOptions
                android.applicationVariants.all {def variant ->
                    project.logger.error "xxxxx ${variant.name.capitalize()}"
//       def processResourcesTask = project.tasks.getByName("process${variant.name.capitalize()}Resources")
                    project.logger.error "xxxxx ${aaptOptions}"
                    if (aaptOptions) {
//                        def aaptOptions = processResourcesTask.aaptOptions
                        File publicTxtFile = project.rootProject.file('generate_public.txt')
                        //public文件存在，则应用，不存在则生成
                        if (publicTxtFile.exists()) {
                            project.logger.error "${publicTxtFile} exists, apply it."
                            //aapt2添加--stable-ids参数应用
                            aaptOptions.additionalParameters("--stable-ids", "${publicTxtFile}")
                        } else {
                            project.logger.info "${publicTxtFile} not exists, generate it."
                            //aapt2添加--emit-ids参数生成
                            aaptOptions.additionalParameters("--emit-ids", "${publicTxtFile}")
                        }
                    }

                }
            }
        }
    }
}

task convertPublicXmlToPublicTxt(){

    project.logger.error "start convertPublicXmlToPublicTxt"
//源public.xml
    File publicXmlFile = project.rootProject.file('app/src/main/res/values/public.xml')
//目标public.txt
    File publicTxtFile = project.rootProject.file('generate_public.txt')
//包名
    String applicationId = "com.geniatech.oobe"
    GFileUtils.deleteQuietly(publicTxtFile)
    GFileUtils.touch(publicTxtFile)
    def nodes = new XmlParser().parse(publicXmlFile)
//        Pattern drawableGeneratePattern = Pattern.compile('^(.*?_)([0-9]{0,})$')
    nodes.each {
        project.logger.error "${it}"
/*            if ("drawable".equalsIgnoreCase("${[e-mail]}")) {
//以'_数字'结尾的drawable资源，此类资源是aapt编译时生成的nested资源，如avd_hide_password_1, avd_hide_password_2
//但是可能会有其他资源掺杂，如abc_btn_check_to_on_mtrl_000, abc_btn_check_to_on_mtrl_015
//为了将此类资源过滤掉，将正则匹配到的数字转成int，对比原始数字部分匹配字符串，如果一致，则是aapt生成
//重要：为了避免此类nested资源生成顺序发生改变，应该禁止修改此类资源
//aapt生成的是以下表1开始，aapt2是以下标0开始，因此转换的过程需要-1
                Matcher matcher = drawableGeneratePattern.matcher([e-mail])
                if (matcher.matches() && matcher.groupCount() == 2) {
                    String number = matcher.group(2)
                    if (number.equalsIgnoreCase(Integer.parseInt(number).toString())) {
                        String prefixName = matcher.group(1)
                        publicTxtFile.append("${applicationId}:${[e-mail]}/\$${prefixName}_${Integer.parseInt(number) - 1} = ${[e-mail]}\n")
                        return
                    }
                }
            }*/
        publicTxtFile.append( "${applicationId}:${[e-mail]}/${[e-mail]} = ${[e-mail]}\n")
    }

    doFirst{
        project.logger.error 'convertPublicXmlToPublicTxt doFirst'
    }

    doLast {
        project.logger.error 'convertPublicXmlToPublicTxt doLast'
    }
}

 3.引入我们的public-xml.gradle和在根build.gradle中自动触发task convertPublicXmlToPublicTxt

this.afterEvaluate { Project project ->
    project.logger.error "start afterEvaluate"
    tasks.matching {
        project.logger.error "test task ${it.name}"
        it.name.startsWith('wrapper')
    }.each { task ->
        task.dependsOn(convertPublicXmlToPublicTxt)
    }
}