HarmonyOS 如何使用ShareKit分享应用内生成的图片

app内生成了一张图片，图片路径为/data/storage/el2/base/haps/entry/cache/1722330970.661.png。想通过ShareKit分享这张图片，但是无法正常分享或者保存图片。使用的代码如下：

let shareImage = '/data/storage/el2/base/haps/entry/cache/1722330970.661.png'
let data: systemShare.SharedData = new systemShare.SharedData({
  utd: utd.UniformDataType.IMAGE,
  title: "语言",
  uri: shareImage
});
// 构建ShareController
let controller: systemShare.ShareController = new systemShare.ShareController(data);
// 获取UIAbility上下文对象
let context: common.UIAbilityContext = getContext(this) as common.UIAbilityContext;
// 注册分享面板关闭监听
controller.on('dismiss', () => {
  console.info('Share panel closed');
  // 分享结束，可处理其他业务。
});
// 进行分享面板显示
controller.show(context, {
  previewMode: systemShare.SharePreviewMode.DETAIL,
  selectionMode: systemShare.SelectionMode.SINGLE
});

把图片地址改为file:///data/storage/el2/base/haps/entry/cache/1722330970.661.png仍然不能正常分享。