资源目录下的文件到沙箱的单向流动

fs.openSync(path: string, mode?: number): File
fs.writeSync(fd: number, buffer: ArrayBuffer | string, options?: WriteOptions): ResourceManager。ResourceManager.numbergetRawFileContentSync(path: string): Uint8Array

import fileUri from '@ohos.file.fileuri'; 
import common from '@ohos.app.ability.common'; 
import fs from '@ohos.file.fs'; 
 
@Entry 
@Component 
struct Index { 
  @State message string = 'Hello World'; 
  @State uri string = 
 
  build() { 
    Row() { 
      Column() { 
        Text(this.message) 
          .fontSize(50) 
          .fontWeight(FontWeight.Bold) 
          .onClick(() = { 
            let context = getContext(this) as common.UIAbilityContext 
            //此处context在页面侧用该方法获取 
            let filePath = context.filesDir + test.png 
            //获取rawfile里的图片arraybuffer 
            let arrayBuff = context.resourceManager.getRawFileContentSync(icon.png).buffer 
            console.log('testTag-----',arrayBuff) 
            //文件操作 
            let file = fs.openSync(filePath,fs.OpenMode.CREATE | fs.OpenMode.READ_WRITE) 
            fs.writeSync(file.fd,arrayBuff) 
            //获取uri，使用uri来通过image展示，因为image组件目前不支持直接用路径 
            this.uri = fileUri.getUriFromPath(filePath) 
            console.log('testTag-----',filePath) 
          }) 
        Image(this.uri) 
          .width(100) 
          .height(100) 
      } 
      .width('100%') 
    } 
    .height('100%') 
  } 
}