HarmonyOS 鸿蒙Next记录工具类【1】将一个base64编码的图片字符串写入到设备的文件系统中，并返回图片的沙箱路径URI。【2】读取指定路径的图片文件，将其转换为像素地图（PixelMap），并返回这个像素地图对象。

import { buffer } from ‘@kit.ArkTS’;
import { fileIo, fileUri } from ‘@kit.CoreFileKit’;
import image from ‘@ohos.multimedia.image’;
import fs from ‘@ohos.file.fs’;
import { common } from ‘@kit.AbilityKit’;

interface objType {
uri: string
path: string
}
export class FileOperate {
// data为需要转换的base64字符串，返回沙箱路径uri
static async writeFile(data: string): Promise<string> {
let uri = ‘’
let filesDir = getContext().filesDir;
console.info(filesDir:${filesDir})
try {
let filePath = filesDir + “/1.png”;
uri = fileUri.getUriFromPath(filePath);
let file = fileIo.openSync(filePath, fileIo.OpenMode.READ_WRITE | fileIo.OpenMode.CREATE);
console.info("file fd: " + file.fd);
const reg = new RegExp(“data:image/\w+;base64,”)
const base64 = data.replace(reg, “”);
console.log(“base64flag”, base64)
const dataBuffer = buffer.from(base64, ‘base64’)
  await fileIo.writeSync(file.fd, dataBuffer.buffer);
  fileIo.closeSync(file);
  console.log(<span class="hljs-string"><span class="hljs-string">"base64 写入成功 uri--&gt;"</span></span>, uri)
} <span class="hljs-keyword"><span class="hljs-keyword">catch</span></span> (<span class="hljs-built_in"><span class="hljs-built_in">Error</span></span>) {
  console.log(<span class="hljs-string"><span class="hljs-string">'Error.code'</span></span>, <span class="hljs-string"><span class="hljs-string">'-----&gt;👉'</span></span>, <span class="hljs-built_in"><span class="hljs-built_in">JSON</span></span>.stringify(<span class="hljs-built_in"><span class="hljs-built_in">Error</span></span>));
}

<span class="hljs-comment"><span class="hljs-comment">//uri:file://com.midea.weexwebsdkdemo/data/storage/el2/base/haps/entry/files/1.png</span></span>
<span class="hljs-keyword"><span class="hljs-keyword">return</span></span> uri
}
static async fileChangePixelMap(path: string) {
try {
  <span class="hljs-comment"><span class="hljs-comment">// 打开文件读取流</span></span>
  <span class="hljs-keyword"><span class="hljs-keyword">let</span></span> file = fs.openSync(path, fs.OpenMode.READ_ONLY);
  <span class="hljs-comment"><span class="hljs-comment">// 获取当前上下文</span></span>
  <span class="hljs-keyword"><span class="hljs-keyword">let</span></span> context = getContext() as common.UIAbilityContext;
  <span class="hljs-comment"><span class="hljs-comment">// 新建一个保存裁剪后图片的路径</span></span>
  <span class="hljs-keyword"><span class="hljs-keyword">let</span></span> newPath = context.filesDir + <span class="hljs-string"><span class="hljs-string">'/test'</span></span> + <span class="hljs-keyword"><span class="hljs-keyword">new</span></span> <span class="hljs-built_in"><span class="hljs-built_in">Date</span></span>().getTime() + <span class="hljs-string"><span class="hljs-string">'.jpg'</span></span>;
  <span class="hljs-comment"><span class="hljs-comment">// 复制图片到新的路径</span></span>
  fs.copyFileSync(file.fd, newPath);
  <span class="hljs-comment"><span class="hljs-comment">// 关闭文件读取流</span></span>
  fs.closeSync(file);

  <span class="hljs-comment"><span class="hljs-comment">// 创建图片源对象</span></span>
  <span class="hljs-keyword"><span class="hljs-keyword">const</span></span> imageSource: image.ImageSource = image.createImageSource(newPath);
  console.log(<span class="hljs-string"><span class="hljs-string">'imageSource🥳'</span></span>, <span class="hljs-string"><span class="hljs-string">'-----&gt;👉'</span></span>, <span class="hljs-built_in"><span class="hljs-built_in">JSON</span></span>.stringify(imageSource));
  <span class="hljs-comment"><span class="hljs-comment">// 图片解码选项</span></span>
  <span class="hljs-keyword"><span class="hljs-keyword">let</span></span> decodingOptions: image.DecodingOptions = {
    editable: <span class="hljs-literal"><span class="hljs-literal">true</span></span>,
    desiredPixelFormat: <span class="hljs-number"><span class="hljs-number">3</span></span>,
  };
  <span class="hljs-comment"><span class="hljs-comment">// 创建像素地图</span></span>
  <span class="hljs-keyword"><span class="hljs-keyword">let</span></span> mPixelMap: image.PixelMap = await imageSource.createPixelMap(decodingOptions);
  <span class="hljs-comment"><span class="hljs-comment">// 获取图片信息</span></span>
  <span class="hljs-keyword"><span class="hljs-keyword">let</span></span> mImageInfo: image.ImageInfo = await mPixelMap.getImageInfo();
  console.log(<span class="hljs-string"><span class="hljs-string">'mImageInfo🥳'</span></span>, <span class="hljs-string"><span class="hljs-string">'-----&gt;👉'</span></span>, <span class="hljs-built_in"><span class="hljs-built_in">JSON</span></span>.stringify(mImageInfo));
  <span class="hljs-keyword"><span class="hljs-keyword">return</span></span> mPixelMap
} <span class="hljs-keyword"><span class="hljs-keyword">catch</span></span> (e) {
  console.error(<span class="hljs-string"><span class="hljs-string">'imgChange🥳'</span></span>, <span class="hljs-built_in"><span class="hljs-built_in">JSON</span></span>.stringify(e));
  <span class="hljs-keyword"><span class="hljs-keyword">return</span></span> <span class="hljs-literal"><span class="hljs-literal">undefined</span></span>
}
}
}
@Entry
@Component
struct Page41 {
@State mPixelMap: image.PixelMap | undefined = undefined
@State uri: string = “”
@State base64Str: string =
‘data:image/png;base64,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’
build() {
Column() {
Button(‘测试 writeFile’).onClick(async () => {
this.uri = await FileOperate.writeFile(this.base64Str)
})
Button(‘测试 fileChangePixelMap’).onClick(async () => {
this.mPixelMap = await FileOperate.fileChangePixelMap(this.uri)
})
Image(this.mPixelMap).width(‘200lpx’)
}
.height(‘100%’)
.width(‘100%’)
}
}<button style="position: absolute; padding: 4px 8px 0px; cursor: pointer; top: 8px; right: 8px; font-size: 14px;">复制</button>