expo-camera: Error: Permissions module is null - react-native

Question

I have an error in console after to install expo-camera.
expo install expo-camera
add permission in android manifest
add module expo camera in maven
allprojects {
repositories {
// * Your other repositories here *
// * Add a new maven block after other repositories / blocks *
maven {
// expo-camera bundles a custom com.google.android:cameraview
url "$rootDir/../node_modules/expo-camera/android/maven"
}
}
}
start the protect
click on the button to show camera ... error in log
Error: Permissions module is null.
Permission:
<uses-permission android:name="android.permission.CAMERA" />
update 1 :
I test with this code example to check my permission
https://reactnative.dev/docs/permissionsandroid
my example function
// state local
const [hasPermission, setHasPermission] = useState(null);
// function
const requestCameraPermission = async () => {
console.log('requestCameraPermission')
try {
const granted = await PermissionsAndroid.request(
PermissionsAndroid.PERMISSIONS.CAMERA,
{
title: "Cool Photo App Camera Permission",
message:
"Cool Photo App needs access to your camera " +
"so you can take awesome pictures.",
buttonNeutral: "Ask Me Later",
buttonNegative: "Cancel",
buttonPositive: "OK"
}
);
if (granted === PermissionsAndroid.RESULTS.GRANTED) {
setHasPermission(true)
console.log("You can use the camera");
} else {
console.log("Camera permission denied");
setHasPermission(false)
}
} catch (err) {
console.warn(err);
}
};
// result of requestCameraPermission : You can use the camera
// Error : Attempt to invoke interface method 'boolan expo.modules.interfaces.permission.Permission.hasGrantedPermissions(java.lang.string[]) on a null object reference
I make something wrong ?
thanks for help

Answer 1

If you did just these steps, you have to do more things to make it works on Android device.
Github page says:
Adjust the android/build.gradle to add a new maven block after all other repositories as described below:
allprojects {
repositories {
// * Your other repositories here *
// * Add a new maven block after other repositories / blocks *
maven {
// expo-camera bundles a custom com.google.android:cameraview
url "$rootDir/../node_modules/expo-camera/android/maven"
}
}
}
But before do that, you should:
For bare React Native projects, you must ensure that you have installed and configured the react-native-unimodules package before continuing.