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fix black screen

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This commit is contained in:
otsmr 2026-07-29 14:34:36 +02:00
parent 79d668e004
commit e8e3254278
4 changed files with 82 additions and 3 deletions
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33
lib/src/visual/views/camera/camera_preview_components/camera_preview_controller_view.dart
View file

@ -168,6 +168,7 @@ class _CameraPreviewViewState extends State<CameraPreviewView> {
super.initState();
initVolumeControl();
initAsync();
_checkAndInitCamera();
}
@override
@ -176,12 +177,26 @@ class _CameraPreviewViewState extends State<CameraPreviewView> {
if (oldWidget.isVisible != widget.isVisible) {
if (widget.isVisible) {
initVolumeControl();
_checkAndInitCamera();
} else {
_deInitVolumeControl();
}
}
}
void _checkAndInitCamera() {
if (widget.isVisible &&
mc.cameraController == null &&
!mc.initCameraStarted) {
unawaited(
mc.selectCamera(
mc.selectedCameraDetails.cameraId,
false,
),
);
}
}
@override
void dispose() {
_videoRecordingTimer?.cancel();
@ -686,7 +701,23 @@ class _CameraPreviewViewState extends State<CameraPreviewView> {
Widget build(BuildContext context) {
if (mc.selectedCameraDetails.cameraId >= AppEnvironment.cameras.length ||
mc.cameraController == null) {
return Container();
if (widget.isVisible && !mc.initCameraStarted) {
WidgetsBinding.instance.addPostFrameCallback((_) {
_checkAndInitCamera();
});
}
// Show a loader instead of an empty container to prevent a black screen
// while the camera is initializing or if initialization failed.
return Center(
child: SizedBox(
height: 60,
width: 60,
child: ThreeRotatingDots(
size: 40,
color: context.color.primary,
),
),
);
}
return StreamBuilder(
stream: userService.onUserUpdated,

21
lib/src/visual/views/camera/camera_preview_components/main_camera_controller.dart
View file

@ -155,6 +155,7 @@ class MainCameraController {
} catch (e) {
Log.error('Error querying available cameras: $e');
initCameraStarted = false;
setState?.call();
return;
}
@ -164,6 +165,7 @@ class MainCameraController {
'Trying to select a non existing camera $cameraId >= ${AppEnvironment.cameras.length}',
);
initCameraStarted = false;
setState?.call();
return;
}
@ -192,7 +194,7 @@ class MainCameraController {
final hasMic = await micPermissionFuture;
if (sessionId != _cameraSessionId) return;
final controller = CameraController(
var controller = CameraController(
AppEnvironment.cameras[cameraId],
ResolutionPreset.high,
enableAudio: hasMic,
@ -204,7 +206,21 @@ class MainCameraController {
var assignedToGlobal = false;
try {
_initializeFuture = controller.initialize();
await _initializeFuture;
try {
await _initializeFuture;
} on CameraException catch (e) {
// If specific image format is unsupported on this hardware, fallback to default format
Log.warn('Initial camera format initialization failed ($e), trying fallback format...');
await controller.dispose();
controller = CameraController(
AppEnvironment.cameras[cameraId],
ResolutionPreset.high,
enableAudio: hasMic,
);
_initializeFuture = controller.initialize();
await _initializeFuture;
}
if (sessionId != _cameraSessionId) {
unawaited(controller.dispose());
return;
@ -256,6 +272,7 @@ class MainCameraController {
unawaited(controller.dispose());
}
initCameraStarted = false;
setState?.call();
return;
}
} else {

15
lib/src/visual/views/camera/camera_qr_scanner.view.dart
View file

@ -1,6 +1,8 @@
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:twonly/globals.dart';
import 'package:twonly/src/database/daos/contacts.dao.dart';
import 'package:twonly/src/database/twonly.db.dart';
import 'package:twonly/src/services/key_verification.service.dart';
@ -8,6 +10,7 @@ import 'package:twonly/src/utils/misc.dart';
import 'package:twonly/src/visual/views/camera/camera_preview_components/camera_preview.dart';
import 'package:twonly/src/visual/views/camera/camera_preview_components/camera_preview_controller_view.dart';
import 'package:twonly/src/visual/views/camera/camera_preview_components/main_camera_controller.dart';
import 'package:twonly/src/visual/views/camera/share_image_editor_components/action_button.dart';
class QrCodeScannerView extends StatefulWidget {
const QrCodeScannerView({
@ -41,6 +44,7 @@ class QrCodeScannerViewState extends State<QrCodeScannerView> {
}
Permission.camera.isGranted.then((hasPermission) {
if (hasPermission && mounted) {
AppState.hasCameraPermissions = true;
unawaited(_mainCameraController.selectCamera(0, true));
}
});
@ -100,6 +104,17 @@ class QrCodeScannerViewState extends State<QrCodeScannerView> {
),
),
),
// Always-visible back button so the user can exit regardless of
// camera state (e.g. during init or after init failure).
Positioned(
left: 5,
top: MediaQuery.paddingOf(context).top + 10,
child: ActionButton(
FontAwesomeIcons.xmark,
tooltipText: context.lang.close,
onPressed: () => Navigator.pop(context),
),
),
],
),
);

16
lib/src/visual/views/camera/camera_send_to.view.dart
View file

@ -1,10 +1,14 @@
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:twonly/globals.dart';
import 'package:twonly/src/database/twonly.db.dart';
import 'package:twonly/src/utils/misc.dart';
import 'package:twonly/src/visual/views/camera/camera_preview_components/camera_preview.dart';
import 'package:twonly/src/visual/views/camera/camera_preview_components/camera_preview_controller_view.dart';
import 'package:twonly/src/visual/views/camera/camera_preview_components/main_camera_controller.dart';
import 'package:twonly/src/visual/views/camera/share_image_editor_components/action_button.dart';
class CameraSendToView extends StatefulWidget {
const CameraSendToView(this.sendToGroup, {super.key});
@ -24,6 +28,7 @@ class CameraSendToViewState extends State<CameraSendToView> {
};
Permission.camera.isGranted.then((hasPermission) {
if (hasPermission && mounted) {
AppState.hasCameraPermissions = true;
unawaited(_mainCameraController.selectCamera(0, true));
}
});
@ -58,6 +63,17 @@ class CameraSendToViewState extends State<CameraSendToView> {
isVisible: true,
),
),
// Always-visible back button so the user can exit regardless of
// camera state (e.g. during init or after init failure).
Positioned(
left: 5,
top: MediaQuery.paddingOf(context).top + 10,
child: ActionButton(
FontAwesomeIcons.xmark,
tooltipText: context.lang.close,
onPressed: () => Navigator.pop(context),
),
),
],
),
);