有哪位知道怎样调用系统相机拍照

invokeCamera(callback?: (uri: string) => void) { 
  const context = getContext(this) as common.UIAbilityContext 
  context.startAbilityForResult({ 
    action: “ohos.want.action.imageCapture”, 
    parameters: { 
      callBundleName: “com.example.mydemo” //本应用bundlename 
    } 
  }, (err: BusinessError, data: common.AbilityResult) => { 
    if (err && err.code != 0) { 
      console.error(“imageCapture error:” + ${JSON.stringify(err)}); 
      return; 
    } 
    console.warn(“imageCapture data:” + ${JSON.stringify(data)}); 
    let uri = data?.want?.parameters?.resourceUri; 
    if (callback && uri) { 
      callback(uri.toString()); 
    } 
  })