Camera Permission on Android


We run into a problem with permission with Android.
Here is the permissons in App.json

 "permissions": [

and when I try to use Expo.ImagePicker.launchImageLibraryAsync(options) or Expo.ImagePicker.launchCameraAsync(options), it will show

user rejected permissions

which prevents me from taking a picture or pick a picture. Any idea how this happens?

I have figured it out, Expo.ImagePicker is looking for WRITE_EXTERNAL_STORAGE and CAMERA permission, if anyone of them is missing, expo will throw the above error