Android Studio3.3系列variantOutput.getPackageApplication()' is obsolete

原因:
build.gradle中修改apk名称输出目录等操作调用将废弃的api
如output.outputFile output.packageApplication

applicationVariants.all { variant ->
        variant.outputs.all { output ->
            def outputFile = output.outputFile
			...
            if (outputFile != null && outputFile.name.endsWith('.apk')) {
             ...
            }
        }
    }

可以直接删掉或者替换掉

def outputFile = output.outputFile
if (outputFile != null && outputFile.name.endsWith(’.apk’)) {
}

//将app移动到项目根目录
def relativeRootDir = output.packageApplication.outputDirectory.toPath()
                        .relativize(rootDir.toPath()).toFile()
outputFileName = new File("$relativeRootDir/apk", fileName)

简单粗暴的方法是将
outputFileName = new File("$relativeRootDir/apk", fileName)
改为
outputFileName = new File("../../../../../../apk", fileName)