react-native-image-picker launchCamera 在 android 中无法工作

Question

我在 React Native 中使用

"react-native-image-picker": "^3.0.1"

来捕获图像。但我在 android 9 中打开相机时出现错误。

我遇到错误：

{"errorCode": "others", "errorMessage": "This library does not require Manifest.permission.CAMERA, if you add this permission in manifest then you have to obtain the same."}

这是我的代码

ImagePicker.launchCamera(
          {
            includeBase64: false,
            mediaType: 'photo',
            quality: 0.8,
          },
          async (response) => {
            if (response.didCancel) {
              console.log('User cancelled image picker');
            } else if (response.error) {
              console.log('ImagePicker Error: ', response.error);
            } else {
              
            }
          },
        );

Answer 1

在捕获图像之前，请向用户询问“相机权限”。在 Android marshmallow 版本以上，您还应该请求 Run Time 权限，这称为危险权限。

const requestCameraPermission = async () => {
  try {
    const granted = await PermissionsAndroid.request(
      PermissionsAndroid.PERMISSIONS.CAMERA,
      {
        title: "App Camera Permission",
        message:"App needs access to your camera ",
        buttonNeutral: "Ask Me Later",
        buttonNegative: "Cancel",
        buttonPositive: "OK"
      }
    );
    if (granted === PermissionsAndroid.RESULTS.GRANTED) {
      console.log("Camera permission given");
    } else {
      console.log("Camera permission denied");
    }
  } catch (err) {
    console.warn(err);
  }
};

然后，如果获得许可，则在 

if

内调用

ImagePicker.launchCamera

Answer 2

Answer 3

将选项添加到 android pp\src\main\AndroidManifest.xml -> 部分

application

- >参数android：requestLegacyExternalStorage =“true” android pp\src\main\AndroidManifest.xml

...
    <application
      ...
      android:requestLegacyExternalStorage="true"
      ...>

Answer 4

将await添加到函数launchCamera

• 添加 includeBase64: false
• 添加参数 saveToPhotos: true
• 添加媒体类型：'照片'
{ 包括Base64：假， 保存到照片：正确， 媒体类型：'照片'， 质量：0.5， }

 await launchCamera(
  {
    includeBase64: false,
    saveToPhotos:true,
    mediaType: 'photo',
    quality: 0.5,
  },
  (resp) => {
    try {
      if (resp.didCancel) {
        return;
      }

      if (!resp.assets) {
        return;
      }

      const assets = resp.assets[0];
      const uri = assets.uri;

      if (uri) {
        const filename = `/${documento.code}.jpg`;
        saveFileStorage(
          readFileImagePath + phoneStorageDir + filename,
          uri,
          documento,
        );
      } else {
        console.log('No hay una imagen valida');
      }
      console.log(uri);

    } catch (error) {
      console.log(error)
    }
  },
);