aapt與aapt2--資源id固定和PUBLIC標記

mkdir compiled
aapt2 compile src/main/res/layout/activity_main.xml -o compiled/

aapt2 link -o out.apk \
-I $ANDROID_HOME/platforms/android-28/android.jar \
compiled/layout_activity_main.xml.flat \
--java src/main/java \
--manifest src/main/AndroidManifest.xml

aapt2 dump out.apk

Binary APK
Package name=com.geminiwen.hello id=7f
  type layout id=01 entryCount=1
    resource 0x7f010000 layout/activity_main
      () (file) res/layout/activity_main.xml type=XML

aapt2 dump $ANDROID_HOME/platforms/android-28/android.jar > test.out

resource 0x010a0000 anim/fade_in PUBLIC
      () (file) res/anim/fade_in.xml type=XML
    resource 0x010a0001 anim/fade_out PUBLIC
      () (file) res/anim/fade_out.xml type=XML
    resource 0x010a0002 anim/slide_in_left PUBLIC
      () (file) res/anim/slide_in_left.xml type=XML
    resource 0x010a0003 anim/slide_out_right PUBLIC
      () (file) res/anim/slide_out_right.xml type=XML

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <item name="forecast_list" type="id"/>
<!--    <item name="app_name" type="string" />-->
</resources>

Execution failed for task ':app:mergeDebugResources'.
> [string/app_name] /Users/tanzx/AndroidStudioProjects/AaptDemo/app/src/main/res/values/strings.xml	[string/app_name] /Users/tanzx/AndroidStudioProjects/AaptDemo/app/src/main/res/values/ids.xml: Error: Duplicate resources

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <public name="forecast_list" id="0x7f040001" type="id" />
    <public name="app_name" id="0x7f070002" type="string" />
    <public name="string3" id="0x7f070003" type="string" />
</resources>

afterEvaluate {
    for (variant in android.applicationVariants) {
        def scope = variant.getVariantData().getScope()
        String mergeTaskName = scope.getMergeResourcesTask().name
        def mergeTask = tasks.getByName(mergeTaskName)
        mergeTask.doLast {
            copy {
                int i=0
                from(android.sourceSets.main.res.srcDirs) {
                    include 'values/public.xml'
                    rename 'public.xml', (i++ == 0? "public.xml": "public_${i}.xml")
                }
                into(mergeTask.outputDir)
            }
        }
    }
}

android {
  aaptOptions {
        File publicTxtFile = project.rootProject.file('public.txt')
        //public檔案存在，則應用，不存在則生成
        if (publicTxtFile.exists()) {
            project.logger.error "${publicTxtFile} exists, apply it."
            //aapt2新增--stable-ids引數應用
            aaptOptions.additionalParameters("--stable-ids", "${publicTxtFile}")
        } else {
            project.logger.error "${publicTxtFile} not exists, generate it."
            //aapt2新增--emit-ids引數生成
            aaptOptions.additionalParameters("--emit-ids", "${publicTxtFile}")
        }
    }
}

android {
    aaptOptions {
        File rFile = project.rootProject.file('R.txt')
        List<String> sortedLines = new ArrayList<>()
        // 一行一行讀取
        rFile.eachLine {line ->
            //rLines.add(line)
            String[] test = line.split(" ")
            String type = test[1]
            String name = test[2]
            String idValue = test[3]
            if ("styleable" != type) {
                sortedLines.add("${applicationId}:${type}/${name} = ${idValue}")
            }
        }
        Collections.sort(sortedLines)
        File publicTxtFile = project.rootProject.file('public.txt')
        if (!publicTxtFile.exists()) {
            publicTxtFile.createNewFile()
            sortedLines?.each {
                publicTxtFile.append("${it}\n")
            }
        }
    }
}

android {
    //將public.txt轉化為public.xml，並對public.xml進行aapt2的編譯將結果複製到${ergeResourceTask.outputDir}
  //下面大部分程式碼是copy自tinker的原始碼
  applicationVariants.all { def variant ->
      def mergeResourceTask = project.tasks.findByName("merge${variant.getName().capitalize()}Resources")
      if (mergeResourceTask) {
          mergeResourceTask.doLast {
              //目標轉換檔案，注意public.xml上級目錄必須帶values目錄，否則aapt2執行時會報非法檔案路徑
              File publicXmlFile = new File(project.buildDir, "intermediates/res/public/${variant.getDirName()}/values/public.xml")
              //轉換public.txt檔案為publicXml檔案，最後一個引數true標識固定資源id
              convertPublicTxtToPublicXml(project.rootProject.file('public.txt'), publicXmlFile, false)
              def variantData = variant.getMetaClass().getProperty(variant, 'variantData')
              def variantScope = variantData.getScope()
              def globalScope = variantScope.getGlobalScope()
              def androidBuilder = globalScope.getAndroidBuilder()
              def targetInfo = androidBuilder.getTargetInfo()
              def mBuildToolInfo = targetInfo.getBuildTools()
              Map<BuildToolInfo.PathId, String> mPaths = mBuildToolInfo.getMetaClass().getProperty(mBuildToolInfo, "mPaths") as Map<BuildToolInfo.PathId, String>
                //通過aapt2 compile命令自己生成public.arsc.flat並輸出到${mergeResourceTask.outputDir}
              project.exec(new Action<ExecSpec>() {
                  @Override
                  void execute(ExecSpec execSpec) {
                      execSpec.executable "${mPaths.get(BuildToolInfo.PathId.AAPT2)}"
                      execSpec.args("compile")
                      execSpec.args("--legacy")
                      execSpec.args("-o")
                      execSpec.args("${mergeResourceTask.outputDir}")
                      execSpec.args("${publicXmlFile}")
                  }
              })
          }
      }
  }
}

/**
 * 轉換publicTxt為publicXml
 * copy tinker:com.tencent.tinker.build.gradle.task.TinkerResourceIdTask#convertPublicTxtToPublicXml
 */
@SuppressWarnings("GrMethodMayBeStatic")
void convertPublicTxtToPublicXml(File publicTxtFile, File publicXmlFile, boolean withId) {
    if (publicTxtFile == null || publicXmlFile == null || !publicTxtFile.exists() || !publicTxtFile.isFile()) {
        throw new GradleException("publicTxtFile ${publicTxtFile} is not exist or not a file")
    }

    GFileUtils.deleteQuietly(publicXmlFile)
    GFileUtils.mkdirs(publicXmlFile.getParentFile())
    GFileUtils.touch(publicXmlFile)

    project.logger.info "convert publicTxtFile ${publicTxtFile} to publicXmlFile ${publicXmlFile}"

    publicXmlFile.append("<!-- AUTO-GENERATED FILE.  DO NOT MODIFY -->")
    publicXmlFile.append("\n")
    publicXmlFile.append("<resources>")
    publicXmlFile.append("\n")
    Pattern linePattern = Pattern.compile(".*?:(.*?)/(.*?)\\s+=\\s+(.*?)")

    publicTxtFile.eachLine {def line ->
        Matcher matcher = linePattern.matcher(line)
        if (matcher.matches() && matcher.groupCount() == 3) {
            String resType = matcher.group(1)
            String resName = matcher.group(2)
            if (resName.startsWith('$')) {
                project.logger.info "ignore to public res ${resName} because it's a nested resource"
            } else if (resType.equalsIgnoreCase("styleable")) {
                project.logger.info "ignore to public res ${resName} because it's a styleable resource"
            } else {
                if (withId) {
                    publicXmlFile.append("\t<public type=\"${resType}\" name=\"${resName}\" id=\"${matcher.group(3)}\" />\n")
                } else {
                    publicXmlFile.append("\t<public type=\"${resType}\" name=\"${resName}\" />\n")
                }

            }
        }
    }
    publicXmlFile.append("</resources>")
}

no signature of method com.android.build.gradle.internal.variant.applicationvariantdata.getscope() is applicable for argument types: () values: []