Cannot set the value of readonly property ‘outputFile‘ for ApkVariantOutputImpl_Decorated

gradle升级后，之前的打包生成apk并重命名代码出现了问题，经查一共有2个地方要修改，下边代码是修改前：

    applicationVariants.all { variant ->
        variant.outputs.each { output ->
            def environment = 'TUI';
            def oldFile = output.outputFile
            if (variant.buildType.name == 'release') {
                def releaseApkName = 'PORSCHE_'+ defaultConfig.versionName + '_' +releaseTime()+ '_'+environment+'_release.apk'
                output.outputFile = new File(oldFile.parent, releaseApkName)
            } else {
                def debugApkName = 'PORSCHE_' + defaultConfig.versionName + '_' /*+ releaseTime()+ '_'*/+environment+'_debug.apk'
                output.outputFile = new File(oldFile.parent, debugApkName)
            }
        }
    }

这个是修改后：

applicationVariants.all { variant ->
        variant.outputs.each { output ->
            def environment = 'TUI';
            def oldFile = output.packageApplication.outputDirectory.toPath()
                    .relativize(rootDir.toPath()).toFile()
            if (variant.buildType.name == 'release') {
                def releaseApkName = 'PORSCHE_'+ defaultConfig.versionName + '_' +releaseTime()+ '_'+environment+'_release.apk'
                output.outputFileName = new File(oldFile.parent, releaseApkName)
            } else {
                def debugApkName = 'PORSCHE_' + defaultConfig.versionName + '_' /*+ releaseTime()+ '_'*/+environment+'_debug.apk'
                output.outputFileName = new File(oldFile.parent, debugApkName)
            }
        }
    }

第一处：output.outputFile = 改成 output.outputFileName =

第二处：def oldFile = output.outputFile 改成 output.packageApplication.outputDirectory.toPath()
.relativize(rootDir.toPath()).toFile()

否则就会报 Absolute path are not supported when setting an output file name 错误