face_detection_lock

Description:

face detection lock

A flutter package for IOS and Android to secure all or part of your app under face detection.
Features #

Widget will lock screen when a face is not detected looking at phone
A snapshot of the face which unlocked the screen can be accessed via a callback function.

Getting started #
First, this package used google Mk kit for face detection. So you have to connect your project to a firebase project and past the google-services.json file in the android/app/ directory in your flutter project.
Second, add camera as a dependency in your pubspec.yaml file.
#iOS

This package uses the camera for face detection. So make sure you request for camera permission.

Add two rows to the ios/Runner/Info.plist:
one with the key Privacy - Camera Usage Description and a usage description.
and one with the key Privacy - Microphone Usage Description and a usage description.
If editing Info.plist as text, add:
<key>NSCameraUsageDescription</key>
<string>your usage description here</string>
<key>NSMicrophoneUsageDescription</key>
<string>your usage description here</string>
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#Android
Change the minimum Android SDK version to 21 (or higher) in your android/app/build.gradle file.
minSdkVersion 21
Usage #
If you wish to use this widget only to lock only a single page of your app or the whole app, then you can simply wrap the page you want to lock or the whole app with FaceDetectionLock widget respectively as follows;
return FaceDetectionLock(
body: MyAppOrWidgetToSecure()
);
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However, if you wish to pass an existing camera controller and/or get hold of the faces that triggered the app unlock, then do the following.

You can get hold of the faces, that unlocked the device
via a call back function. For this function to be initialized
you need to set the isBlocInitializeAbove to true and make
sure you initialize the FaceDetectionBloc a widget above and
call the initializeCam event prior to calling the FaceDetectionLock
for example

MaterialApp(
home: BlocProvider(
create:(context) => FaceDetectionBloc(cameraController: controller, onFaceSnapshot: callbackFunction )
..add(const FaceDetectionEvent.initializeCam());
child: BodyWidget()
)
)
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Then make sure that when calling the FaceDetectionLock widget lower in the widget true you set the parameter isBlocInitializeAbove to true. For instance
return FaceDetectionLock(
isBlocInitializeAbove: true,
body: BankAccountPageToSecure()
);
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