HarmonyOS 鸿蒙Next rawfile文件判断以及解压

关于如何判断rawfile文件夹中是否包含指定文件，通过getRawFileContent方法来获取文件，如果能获取到就包含。

关于的第二个lzma，我并没有使用过，这边有个zip的demo案例，你看下是否能提供一些思路

import fs from '@ohos.file.fs';
import { hilog } from '@kit.PerformanceAnalysisKit';
import { BusinessError, zlib } from '@kit.BasicServicesKit';

@Entry
@Component
struct FileTest {
  build() {
    Column() {
      Button('解压rawfile下文件').fontSize(20).fontWeight(FontWeight.Bold).margin(10).onClick(() => {
        rawfileZlibDecompress()
      })
    }.justifyContent(FlexAlign.Center).height('100%').width('100%')
  }
}

//解压rawfile下文件
function rawfileZlibDecompress() {
  //获取resources/rawfile目录下对应的rawfile文件内容,返回获取的rawfile文件内容
  getContext().resourceManager.getRawFileContent('file1.zip', (_err, value) => {
    let myBuffer: ArrayBufferLike =
      value.buffer
    //将rawfile下的文件拷贝至沙箱下，沙箱路径：/data/storage/el2/base/haps/entry/filesfile1.zip
    let filePath = getContext().filesDir + 'file1.zip';
    let file = fs.openSync(filePath, fs.OpenMode.READ_WRITE | fs.OpenMode.CREATE);
    let writeLen = fs.writeSync(file.fd, myBuffer);
    hilog.info(0xFF00, "LOG_TAG", `write data to file succeed and size is:${writeLen}`);
    fs.closeSync(file);
    let outFileDir = getContext().filesDir;
    //解压的配置参数
    let options: zlib.Options = { level: zlib.CompressLevel.COMPRESS_LEVEL_DEFAULT_COMPRESSION };
    //解压沙箱下的文件
    try {
      zlib.decompressFile(filePath, outFileDir, options, (errData: BusinessError) => {
        if (errData !== null) {
          hilog.error(0xFF00, "LOG_TAG", `errData is errCode:${errData.code} message:${errData.message}`);
        }
      })
    } catch (errData) {
      let code = (errData as BusinessError).code;
      let message = (errData as BusinessError).message;
      hilog.error(0xFF00, "LOG_TAG", `errData is errCode:${code} message:${message}`);
    }
  })
}