This is a convenient React Native plugin designed to manage the flashlight on/off functionality.
npm install --save react-native-torch
react-native link react-native-torch
If you want to switch the flashlight without permissions check, use the following code:
import Torch from 'react-native-torch';
Torch.switchState(true); // Turn ON
Torch.switchState(false); // Turn OFF
To include an extra permission check and dialog for Android users only, try this code:
import Torch from 'react-native-torch';
import { Platform } from 'react-native';
if (Platform.OS === 'ios') {
Torch.switchState(this.isTorchOn);
} else {
const cameraAllowed = await Torch.requestCameraPermission(
'Camera Permissions', // dialog title
'We require camera permissions to use the torch on the back of your phone.' // dialog body
);
if (cameraAllowed) {
Torch.switchState(this.isTorchOn);
}
}
In case of an exception while trying to access the Torch on Android devices, handle it with the following code:
try {
await Torch.switchState(newTorchState);
this.setState({ isTorchOn: newTorchState });
} catch (e) {
ToastAndroid.show(
'We seem to have an issue accessing your torch',
ToastAndroid.SHORT
);
}
Please note that iOS may fail silently while Android devices can still function properly even without the try/catch block in place.
The Android version of this plugin comes with support for flow.