Please provide the following:
- SDK Version: 36
- Platforms(Android/iOS/web/all): all
I am working on a react-native
application and I want to get the camera types (front and back) on the web and native.
In the documentation, it is written:
Camera.getAvailableCameraTypesAsync(): string[]
Returns a list of camera types['front', 'back']
. This is useful for desktop browsers which only have front-facing cameras.import { Camera } from 'expo-camera'; const types = await Camera.getAvailableCameraTypesAsync();
This is my Camera.js
:
import React, { useState, useEffect } from 'react';
import { Platform, View, TouchableOpacity } from 'react-native';
import { FAB, Text } from 'react-native-paper';
import { Camera } from 'expo-camera';
export default function CoreCamera() {
const [hasPermission, setHasPermission] = useState(null);
const [type, setType] = useState(Camera.Constants.Type.back);
const [types, setTypes] = useState(null);
useEffect(() => {
(async () => {
const types = await Camera.getAvailableCameraTypesAsync();
alert(JSON.stringify(types));
setTypes(types);
if (Platform.OS === 'web') {
setHasPermission(true);
} else {
const { status } = await Camera.requestPermissionsAsync();
setHasPermission(status === 'granted');
}
})();
}, []);
if (hasPermission === null) {
return <View />;
}
if (hasPermission === false) {
return <Text>No access to camera</Text>;
}
return (
<View style={{ flex: 1 }}>
<Camera style={{ flex: 1 }} type={type}>
<View
style={{
flex: 1,
backgroundColor: 'transparent',
flexDirection: 'row',
}}
>
<TouchableOpacity
style={{
flex: 0.1,
alignSelf: 'flex-end',
alignItems: 'center',
}}
onPress={() => {
setType(
type === Camera.Constants.Type.back
? Camera.Constants.Type.front
: Camera.Constants.Type.back,
);
}}
>
<FAB
style={{ marginBottom: 20 }}
icon="camera-switch"
/>
</TouchableOpacity>
</View>
</Camera>
</View>
);
}
On Android, it gives me the following error:
[Unhandled promise rejection: Error: The method or property expo-camera.getAvailableCameraTypesAsync is not available on android, are you sure you've linked all the native dependencies properly?]
On iOS, it gives me the following error:
[Unhandled promise rejection: Error: The method or property expo-camera.getAvailableCameraTypesAsync is not available on ios, are you sure you've linked all the native dependencies properly?]
On the web, it gives me the following error:
bundle.js:73612 Uncaught (in promise) TypeError: Cannot read property 'getAvailableCameraTypesAsync' of undefined
at getAvailableCameraTypesAsync$ (bundle.js:73612)
at tryCatch (bundle.js:185959)
I have tried to replace:
-import { Camera } from 'expo-camera';
+import Camera from 'expo-camera/build/Camera';
Now the alert shows an empty array on the web.
How can I test the presence of the back camera on the web with expo?
expo-camera version 8.0.0
edit
I have tried to update expo-camera@8.2.0
and it is worst: