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【HarmonyOS】鸿蒙应用唤起系统相机拍照

方案一：

官方推荐的方式，使用CameraPicker来调用安全相机进行拍照。

    let pathDir = getContext().filesDir;let fileName = `${new Date().getTime()}`let filePath = pathDir + `/${fileName}.tmp`fileIo.createRandomAccessFileSync(filePath, fileIo.OpenMode.CREATE);let uri = fileUri.getUriFromPath(filePath);let pickerProfile: picker.PickerProfile = {cameraPosition: camera.CameraPosition.CAMERA_POSITION_BACK,saveUri: uri // 用于保存图片};let result: picker.PickerResult =await picker.pick(getContext(), [picker.PickerMediaType.PHOTO],pickerProfile);console.info(`picker resultCode: ${result.resultCode},resultUri: ${result.resultUri},mediaType: ${result.mediaType}`);if (result.resultCode == 0) {if (result.mediaType === picker.PickerMediaType.PHOTO) {this.imgSrc = result.resultUri;} }

注意：
在应用调试时，开发者需在release模式下调用系统相机（CameraPicker）。
由于系统限制了debug模式下不允许调试release应用，在debug模式下调用系统相机，将导致异常。

方案二：

使用startAbility拉起相机系统应用，通过want接收回调信息。

private async thirdPartyCall(supportMultiMode: boolean) {this.isCrop = false;console.log("thirdPartyCall savaPath=" + this.savePath);// 拉起拍照功能let want: Want = {"action": 'ohos.want.action.imageCapture',"parameters": {supportMultiMode: supportMultiMode,// 回调包名很重要，若不匹配将无法获取返回图片Uri的操作权限callBundleName: "com.example.persontest"}};// 获取图片uriif (this.context) {let result: common.AbilityResult = await this.context.startAbilityForResult(want);let params = result?.want?.parameters as Record<string, string | number>let imagePathSrc = params?.resourceUri as string;console.info(this.TAG, 'thirdPartyCall imagePathSrc= ' + imagePathSrc);console.info(this.TAG, 'thirdPartyCall params= ' + JSON.stringify(params));await this.getImage(imagePathSrc);}}