Flutter WeChat Camera Picker #

Language: English | 中文

A camera picker for Flutter projects based on WeChat's UI, which is also a separate runnable extension to the wechat_assets_picker.

Current WeChat version that UI based on: 8.0.49 UI designs will be updated following the WeChat update in anytime.

See the Migration Guide to learn how to migrate between breaking changes.

Versions compatibility #

The package only guarantees to be working on the stable version of Flutter. We won't update it in real-time to align with other channels of Flutter.

	2.8.0	3.3.0	3.16.0
4.2.0+	❌	❌	✅
4.0.0+	❌	✅	❌
3.0.0+	✅	❌	❌

Package credits #

The package is built from these wonderful packages.

Name	Features
photo_manager	The basic abstractions and management for assets.
camera	Captures images and videos.
video_player	Plays videos and audios correspondingly.

Their implementation should be relatively stable in the package. If you've found any issues related to them when using the picker, submit issues to our issue tracker first.

Table of content

Flutter WeChat Camera Picker

Features ✨ #

♿ Complete a11y support with TalkBack and VoiceOver
♻️ Fully implementable with States override
🎏 Fully customizable theme based on ThemeData
💚 Completely WeChat style (even more)
⚡️ Adjustable performance with different configurations
📷 Picture taking support
🎥 Video recording support
- ⏱ Duration limitation support
- 🔍 Scale when recording support
☀️ Exposure adjust support
🔍️ Scale with pinch support
💱 i18n support
- ⏪ RTL language support
🖾 Foreground custom widget builder support
🕹️ Intercept saving with custom process

Screenshots 📸 #

READ THIS FIRST ‼️ #

Be aware of below notices before you started anything:

Due to understanding differences and the limitation of a single document, documents will not cover all the contents. If you find nothing related to your expected features and cannot understand about concepts, run the example project and check every options first. It has covered 90% of regular requests with the package.
The package deeply integrates with the photo_manager plugin, make sure you understand these two concepts as much as possible:
- Asset (photos/videos/audio) - AssetEntity
- Assets collection (albums/libraries) - AssetPathEntity

When you have questions about related APIs and behaviors, check photo_manager's API docs for more details.

Most usages are detailed covered by the example. Please walk through the example carefully before you have any questions.

Preparing for use 🍭 #

If you got a resolve conflict error when running flutter pub get, please use dependency_overrides to fix it.

Setup #

Run flutter pub add wechat_camera_picker, or add wechat_camera_picker to pubspec.yaml dependencies manually.

dependencies:
  wechat_camera_picker: ^latest_version

The latest stable version is:

The latest dev version is:

Follow these detailed setup guide before runs:

Then import the package in your code:

import 'package:wechat_camera_picker/wechat_camera_picker.dart';

Usage 📖 #

Localizations #

When you're picking assets, the package will obtain the Locale? from your BuildContext, and return the corresponding text delegate of the current language. Make sure you have a valid Locale in your widget tree that can be accessed from the BuildContext. Otherwise, the default Chinese delegate will be used.

Embedded text delegates languages are:

简体中文 (default)
English
Tiếng Việt

If you want to use a custom/fixed text delegate, pass it through the CameraPickerConfig.textDelegate.

Simple usage #

final AssetEntity? entity = await CameraPicker.pickFromCamera(context);

With configurations #

Use CameraPickerConfig for more picking behaviors.

final AssetEntity? entity = await CameraPicker.pickFromCamera(
  context,
  pickerConfig: const CameraPickerConfig(),
);

Fields in CameraPickerConfig:

Name	Type	Description	Default Value
enableRecording	`bool`	Whether the picker can record video.	`false`
onlyEnableRecording	`bool`	Whether the picker can only record video. Only available when `enableRecording` is `true` .	`false`
enableTapRecording	`bool`	Whether allow the record can start with single tap. Only available when `enableRecording` is `true` .	`false`
enableAudio	`bool`	Whether Whether the picker should record audio. Only available with recording.	`true`
enableSetExposure	`bool`	Whether users can set the exposure point by tapping.	`true`
enableExposureControlOnPoint	`bool`	Whether users can adjust exposure according to the set point.	`true`
enablePinchToZoom	`bool`	Whether users can zoom the camera by pinch.	`true`
enablePullToZoomInRecord	`bool`	Whether users can zoom by pulling up when recording video.	`true`
enableScaledPreview	`bool`	Whether the camera preview should be scaled during captures.	`false`
shouldDeletePreviewFile	`bool`	Whether the preview file will be delete when pop.	`false`
shouldAutoPreviewVideo	`bool`	Whether the video should be played instantly in the preview.	`true`
maximumRecordingDuration	`Duration?`	The maximum duration of the video recording process.	`const Duration(seconds: 15)`
minimumRecordingDuration	`Duration`	The minimum duration of the video recording process.	`const Duration(seconds: 1)`
theme	`ThemeData?`	Theme data for the picker.	`CameraPicker.themeData(wechatThemeColor)`
textDelegate	`CameraPickerTextDelegate?`	Text delegate that controls text in widgets.	`CameraPickerTextDelegate`
resolutionPreset	`ResolutionPreset`	Present resolution for the camera.	`ResolutionPreset.ultraHigh`
cameraQuarterTurns	`int`	The number of clockwise quarter turns the camera view should be rotated.	`0`
imageFormatGroup	`ImageFormatGroup`	Describes the output of the raw image format.	`ImageFormatGroup.unknown`
preferredLensDirection	`CameraLensDirection`	Which lens direction is preferred when first using the camera.	`CameraLensDirection.back`
lockCaptureOrientation	`DeviceOrientation?`	Whether the camera should be locked to the specific orientation during captures.	null
foregroundBuilder	`ForegroundBuilder?`	The foreground widget builder which will cover the whole camera preview.	null
previewTransformBuilder	`PreviewTransformBuilder?`	The widget builder which will transform the camera preview.	null
onEntitySaving	`EntitySaveCallback?`	The callback type define for saving entity in the viewer.	null
onError	`CameraErrorHandler?`	The error handler when any error occurred during the picking process.	null
onXFileCaptured	`XFileCapturedCallback?`	The callback type definition when the XFile is captured by the camera.	null
onMinimumRecordDurationNotMet	`VoidCallback?`	The callback when the recording is not met the minimum recording duration.	null
onPickConfirmed	`void Function(AssetEntity)?`	The callback when picture is taken or video is confirmed.	null
permissionRequestOption	`PermissionRequestOption?`	The permission request option when saving the captured file using the `photo_manager` package.	null

Using custom `State`s #

All user interface can be customized through custom States, including:

CameraPickerState
CameraPickerViewerState

After override States, pass them through the picking method, more specifically:

CameraPicker.pickFromCamera(createPickerState: () => CustomCameraPickerState());
CameraPickerViewer.pushToViewer(..., createViewerState: () => CustomCameraPickerViewerState());

Frequently asked question 💭 #

Why the orientation behavior is strange on iOS? #

Currently, the preview is not correctly synced on the iOS. You can find more details in this issue: https://github.com/flutter/flutter/issues/89216 . Other than that, please submit issues to describe your question.

Contributors ✨ #

Thank goes to these wonderful people (emoji key):

_{Alex Li} 💻 🎨 📖 💡 🤔 🚧 💬 👀	_Caijinglong 💡 🤔	_Lael 📖	_mjl0602 💻 🤔	_AliasWang 💻 🤔	_leftcoding 🐛	_{Luong The Vinh} 💻
_luomo-pro ️️️️♿️ 🐛	_LeonardoZhu 💻	_{Nguyen Phuc Loi} 🌍	_Amos 🐛	_{Tee Yu June} 💻