HarmonyOS camera api 相机拍照分辨率设置问题

PhotoOutput获取拍照图片时，无法设置分辨率，这个问题，可以设置分辨率，我们这边设置的是相机支持的分辨率，PhotoOutput中的profile属性不能自定义，只能通过接口获取，参考链接：https://developer.huawei.com/consumer/cn/doc/harmonyos-references-V5/js-apis-camera-V5#getsupportedoutputcapability11；

第二个问题，开发者输出出来的图片无法预览，是因为开发者的带直接写进文件的是yuv数据，请参考下面的代码，生成yuv格式的图片：

async yuv(receiver: image.ImageReceiver): Promise<void> {
  receiver.on('imageArrival', () => {
  console.error("imageArrival callback");
  receiver.readNextImage((err, nextImage: image.Image) => {
  let a = nextImage.format
  nextImage.getComponent(image.ComponentType.JPEG, (err: BusinessError, imgComponent: image.Component) => {
  if (err || imgComponent === undefined) {
  // CLog.error('getComponent failed');
}
if (imgComponent) {
  let path: string = getContext().filesDir + "/image1.yuv";
  if (fileIo.accessSync(path)) {
    fileIo.rmdirSync(path)
  }
  let file = fileIo.openSync(path, fileIo.OpenMode.READ_WRITE | fileIo.OpenMode.CREATE);
  let opt: WriteOptions = {
    // 多出2048字节数据
    length: imgComponent.byteBuffer.byteLength
  }
  fileIo.writeSync(file.fd, imgComponent.byteBuffer, opt)
  fileIo.close(file)
} else {
  // CLog.error('byteBuffer is null');
}
})
})
})
}

如果想获取JPEG，请参考这个demo：

async onImageArrival(receiver: image.ImageReceiver): Promise<void> {
  receiver.on('imageArrival', () => {
  console.error("imageArrival callback");
  receiver.readNextImage((err, nextImage: image.Image) => {
  nextImage.getComponent(image.ComponentType.JPEG, async (err, imgComponent: image.Component) => {
  if (err || imgComponent === undefined) {
  return;
}

if (imgComponent.byteBuffer as ArrayBuffer) {
  let sourceOptions: image.SourceOptions = {
    sourceDensity: 120,
    sourcePixelFormat: 8, // NV21
    sourceSize: {
      height: this.previewProfilesObj2!.size.height,
      width: this.previewProfilesObj2!.size.width
    },
  }
  let imageResource = image.createImageSource(imgComponent.byteBuffer, sourceOptions);
  // // 设置参数
  let decodingOptions: image.DecodingOptions = {
    sampleSize:1, // 缩略图采样大小
    editable: true, // 是否可编辑
    desiredSize:{ width:500, height:500}, // 期望输出大小
    rotate: 270, // 旋转角度
    desiredPixelFormat:8, // 解码的像素格式
    desiredRegion: { size: { height:500, width:500 }, x: 0, y: 0 }, // 解码的区域
    index:0 // 图片序号
  };
  imageResource.createPixelMap(decodingOptions).then((res)=>{
    this.imgUrl = res;
  });
} else {
  return;
}
nextImage.release();
})
})
})
}