＃放码来战．端云一体化开发＃HarmonyOS 5 【农民叔叔】15.【端侧工程】拉起手机摄像头拍照或从相册中选取图片-优快云博客

核心技术：相机服务Camera Kit

请参见官方资料：https://developer.huawei.com/consumer/cn/doc/harmonyos-guides/camera-overview

一、申请相机权限

打开src>>main>>module.json5文件，在requestPermissions数组中添加ohos.permission.CAMERA

{
        "name": "ohos.permission.CAMERA",
        "reason": "$string:camera_reason",
        "usedScene": {
          "abilities": [
            "EntryAbility"
          ],
          "when": "always"
        }
      }

二、定义拉起手机摄像头异步方法

/**
   * 拍照
   */
  async pickerCamera():Promise<void>{
    try {
      let pProfile:cameraPicker.PickerProfile={
        cameraPosition:camera.CameraPosition.CAMERA_POSITION_BACK
      };
      let pResult:cameraPicker.PickerResult=await cameraPicker.pick(getContext(this)
      ,[cameraPicker.PickerMediaType.PHOTO],pProfile);
      this.photoUri=pResult.resultUri;
      console.log(this.photoUri);
      let pModel:PestModel =new PestModel();
      pModel.Img=this.photoUri;
      // 跳转病害详情页面
      router.pushUrl({url:'pages/PestInfoPage',params:pModel});
    }catch (err){
      console.error((err as BusinessError).message);
    }
  }

三、定义打开手机相册异步方法

/**
   * 从相册选择
   */
  async getPhotoFromAlbum():Promise<void>{
    let photoSelectOpt=new photoAccessHelper.PhotoSelectOptions();
    photoSelectOpt.MIMEType=photoAccessHelper.PhotoViewMIMETypes.IMAGE_TYPE;
    photoSelectOpt.maxSelectNumber=1;
    let photoPicker=new photoAccessHelper.PhotoViewPicker();
    let photoSelectResult:photoAccessHelper.PhotoSelectResult=await photoPicker.select(photoSelectOpt);
    this.photoUri=photoSelectResult.photoUris[0];
    console.log(this.photoUri);
    if(this.photoUri !==undefined){
      let pModel:PestModel =new PestModel();
      pModel.Img=this.photoUri;
      // 跳转病害详情页面
      router.pushUrl({url:'pages/PestInfoPage',params:pModel});
    }
  }

打开手机摄像头拍照或从相册选择图片后，跳转到病虫害详情页面，展示该图片及更多信息。