5.0的模拟器要如何安装代理呢？

import fs from '@ohos.file.fs'; 
import { BusinessError } from '@kit.BasicServicesKit'; 
import { buffer } from '@kit.ArkTS'; 
import { picker } from '@kit.CoreFileKit'; 
import { resourceManager } from '@kit.LocalizationKit'; 
import { common, Want } from '@kit.AbilityKit'; 
 
@Entry 
@Component 
struct Index { 
  certFileName: string = "xxx.pem"; 
  saveUri: string = ""; 
  certFileData: string = ""; 
  @State status: string = ""; 
 
  createPem() : void { 
    try { 
      let docOpts = new picker.DocumentSaveOptions 
      docOpts.newFileNames = [this.certFileName] 
      let docPicker = new picker.DocumentViewPicker 
      docPicker.save(docOpts).then((result: Array<string>) => { 
        console.error('DocumentViewPicker.save succeed. ' + JSON.stringify(result)); 
        this.saveUri = result[0] 
        this.status = "Create file succeed.\nUri: " + this.saveUri 
      }).catch((err: BusinessError) => { 
        console.error('DocumentViewPicker.save failed with err: ' + JSON.stringify(err)); 
        this.status = "Create file failed.\nError message:" + err.message 
      }) 
    } catch (e) { 
      let err = e as BusinessError 
      console.error('DocumentViewPicker failed with err: ' + JSON.stringify(err)); 
      this.status = "Create file failed.\nError message:" + err.message 
    } 
  } 
 
  getCertData(filename: string) : void { 
    getContext().resourceManager.getRawFd(filename).then((value: resourceManager.RawFileDescriptor) => { 
      console.error('getRawFd succeed id is ' + value.fd); 
      console.error('getRawFd succeed offset is ' + value.offset); 
      console.error('getRawFd succeed length is ' + value.length); 
 
      let arrayBuffer = new ArrayBuffer(4096); 
      fs.read(value.fd, arrayBuffer, {offset: value.offset, length: value.length}).then((readLen: number) => { 
        console.info("read file data succeed"); 
        let buf = buffer.from(arrayBuffer, 0, readLen); 
        console.info(`The content of file: ${buf.toString()}`); 
        this.certFileData = buf.toString(); 
        this.status = "Get cert data succeed.\n" 
      }).catch((err: BusinessError) => { 
        console.error("read file data failed with error message: " + err.message + ", error code: " + err.code); 
        this.status = "Get cert data failed.\nError message:" + err.message 
      }) 
    }).catch((err: BusinessError) => { 
      console.error('getRawFd failed with err: ' + JSON.stringify(err)); 
      this.status = "Get cert data failed.\nError message:" + err.message 
    }) 
  } 
 
  writeFile(uri: string) : void { 
    try { 
      let file = fs.openSync(uri, fs.OpenMode.READ_WRITE); 
      let certData = this.certFileData; 
      // 写入一段内容至文件 
      fs.writeSync(file.fd, certData); 
      // 从文件读取一段内容 
      let arrayBuffer = new ArrayBuffer(4096); 
      class Option { 
        public offset: number = 0; 
        public length: number = 0; 
      } 
 
      let option = new Option(); 
      option.length = arrayBuffer.byteLength; 
      let readLen = fs.readSync(file.fd, arrayBuffer, option); 
      let buf = buffer.from(arrayBuffer, 0, readLen); 
      console.info("the content of file: " + buf.toString()); 
      console.info("test.txt dir:" + file.path); 
      fs.closeSync(file); 
      this.status = "Write data succeed." 
    } catch (e) { 
      let err = e as BusinessError 
      console.error('fs.openSync failed with err: ' + JSON.stringify(err)); 
      this.status = "Write data failed.\nError message:" + err.message 
    } 
  } 
 
  openCertManager() : void { 
    let wantInfo : Want = { 
      deviceId: '', // deviceId为空表示本设备 
      bundleName: 'com.ohos.certmanager', 
      abilityName: 'MainAbility', 
    } 
    // context为调用方UIAbility的AbilityContext 
    let context = getContext(this) as common.UIAbilityContext 
    context.startAbility(wantInfo).then(() => { 
      console.error('openCertManager succeed'); 
      this.status = "Open CertManager succeed." 
    }).catch((err: BusinessError) => { 
      console.error('openCertManager failed with err: ' + JSON.stringify(err)); 
      this.status = "Open CertManager failed.\nError message:" + err.message 
    }) 
  } 
 
  build() { 
    Row() { 
      Column() { 
        Text("Just click one by one.") 
          .fontSize(30) 
          .fontWeight(FontWeight.Bold) 
        Blank().height('20vp') 
        Text("Step1: Create File(.pem)") 
          .fontSize(25) 
          .fontWeight(FontWeight.Bold) 
          .onClick(() => { 
            this.createPem() 
          }) 
        Blank().height('10vp') 
        Text("Step2: Get certfile datas.") 
          .fontSize(25) 
          .fontWeight(FontWeight.Bold) 
          .onClick(() => { 
            this.getCertData(this.certFileName) 
          }) 
        Blank().height('10vp') 
        Text("Step3: Write data to file.") 
          .fontSize(25) 
          .fontWeight(FontWeight.Bold) 
          .onClick(() => { 
            this.writeFile(this.saveUri) 
          }) 
        Blank().height('10vp') 
        Text("Step4: Open CertManager") 
          .fontSize(25) 
          .fontWeight(FontWeight.Bold) 
          .onClick(() => { 
            this.openCertManager() 
          }) 
        Blank().height('10vp') 
        Text(this.status) 
 
      } 
      .width('100%') 
    } 
    .height('100%') 
  } 
}