Tap to focus for Flutter camera - flutter

Question

A simple, but very complicated question: What’s the best way to add a tap to focus functionality for the Flutter camera?
I’ve searched the entire World Wide Web about elegant solutions, but I found nothing.
Do you have an idea?

Answer 1

I might be late but you can try adv_camera package.
Here is a simple example:
import 'package:adv_camera/adv_camera.dart';
import 'package:flutter/material.dart';
class CameraApp extends StatefulWidget {
final String id;
const CameraApp({Key? key, required this.id}) : super(key: key);
#override
_CameraAppState createState() => _CameraAppState();
}
class _CameraAppState extends State<CameraApp> {
List<String> pictureSizes = <String>[];
String? imagePath;
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('AdvCamera Example'),
),
body: SafeArea(
child: AdvCamera(
initialCameraType: CameraType.rear,
onCameraCreated: _onCameraCreated,
onImageCaptured: (String path) {
if (this.mounted)
setState(() {
imagePath = path;
});
},
cameraPreviewRatio: CameraPreviewRatio.r16_9,
focusRectColor: Colors.purple,
focusRectSize: 200,
),
),
floatingActionButton: FloatingActionButton(
heroTag: "capture",
child: Icon(Icons.camera),
onPressed: () {
cameraController!.captureImage();
},
),
);
}
AdvCameraController? cameraController;
_onCameraCreated(AdvCameraController controller) {
this.cameraController = controller;
this.cameraController!.getPictureSizes().then((pictureSizes) {
setState(() {
this.pictureSizes = pictureSizes ?? <String>[];
});
});
}
}