# Mood-Example is a Flutter app built to be read as much as run

> Mood-Example is a BSD-3-Clause Flutter 3 mood tracking sample whose own documentation says the goal is learning and practice, and whose laboratory section adds a uniapp mini program host, games, a 3D city and asynchronous FFI calls to C and C++.

**AmosHuKe/Mood-Example** — 🐦 Flutter 3 心情记录 样例工程 - 国际化 i18n、uni 小程序、深色模式、多主题、本地数据管理、路由管理、状态管理、无障碍（Semantics）、异步 FFI、集成测试、图表统计、Excel 导入导出、游戏…

- Repository: https://github.com/AmosHuKe/Mood-Example
- Stars: 650 · Forks: 117
- Language: Dart
- License: BSD-3-Clause
- Published: 2026-10-21 · Updated: 2026-10-21 · Language: en
- Canonical page: https://hysenlabs.com/projects/amoshuke-mood-example

## A sample project that says it is a sample

Mood-Example is a Flutter 3 mood tracking example project, and the repository is candid about its purpose. The README describes it as a project for managing your own emotions, recording what you see and think at the moment, along with other laboratory features that are updated from time to time, and it states that the Flutter project is used mainly for learning and practice.

The note attached to that is the sentence that should shape your expectations. Because it is a learning and practice project, the focus is on the learning, and many of the business logics may not correspond to reality. There is also a note that emoji can render differently depending on the device, which is a small detail that tells you the author pays attention to how the sample behaves on real hardware.

That framing is a strength, provided you hold it. A repository that pretends to be a production application invites you to copy its architecture without asking whether the architecture is right, while one that says this is a practice project invites you to copy the techniques and argue with the decisions. The second is more useful.

The stack is pinned by badges in the README. The sample is at version 1.9.14, built against Flutter 3.47.4 on the stable channel and Dart 3.13.3, and the licence is BSD-3-Clause. The topic list names Flutter, demo, mini-program, semantics and uniapp, which is an accurate summary of what the repository turns out to be.

## The feature list is a checklist of what a Flutter app can do

The checked feature list reads like a curriculum. Internationalisation with i18n and l10n, multiple themes, dark mode, local data management, routing management, state management, integration tests, the mood recording itself, chart statistics, Excel import and export, accessibility support through Semantics, web access, app lock authentication with a screen lock password and biometric recognition, local notifications, animations, and a laboratory section.

Two of those deserve comment. Excel import and export is the kind of feature that shows up in real applications and is rarely in tutorials, and here it is paired with chart statistics, so the sample covers both the analysis and the data interchange around a record. App lock authentication with a screen lock password and biometric recognition is the other, because it is a platform integration rather than a widget.

The accessibility entry is worth a sentence on its own. Semantics is Flutter's mechanism for describing widgets to assistive technology, and having it as a first-class feature in a learning project rather than an afterthought is a good signal about the author's priorities.

The laboratory section is described in the README as occupying most of the app's package size, with the source location given by the project structure. That is an honest warning and a useful one: if you are reading this repository to learn how a mood tracker is built, a large part of the app's package size is something else entirely.

## The laboratory: a mini program host, games, 3D and FFI

The laboratory sub-features are where the project stops being a mood tracker and starts being a Flutter platform demonstration.

The uniapp mini program piece runs on UniMPSDK v4.85, and it is the most deeply integrated of the set, because the repository structure shows the native work on both mobile platforms. On the Android side there is a libs directory holding the UniMPSDK dependency, assets in the main source set, a Kotlin package with a channel directory containing a method call handler and a method channel registration, a UniMpConfigFactory for initialisation configuration and a UniMpManager. On the iOS side there is a UniMP directory with a Swift method channel, a launch options builder, a manager, an application delegate for the SDK lifecycle and a registrant for capability registration, plus the SDK's own apps and core directories.

So embedding a mini program host in a Flutter app is not a plugin call, it is a platform integration on both sides, and the sample shows the whole shape of it: a method channel to cross the boundary, a manager to own the SDK, a registrant to declare capabilities, and the mini program content itself shipped as assets.

The other laboratory pieces are smaller. The game collection uses Bonfire and Flame, the two Flutter game engines, the 3D city loads obj format models, and the FFI section calls C and C++ asynchronously through the newer Hooks mechanism, with a dedicated hook directory at the top of the repository. The tilt feature appears in the feature tree as well, which is the sort of thing that needs platform sensors.

Together they cover a lot of ground that a tutorial application usually skips.

## A data, domain and features split in lib

The lib directory is organised into the three layers the README's structure diagram names, and the comments in that diagram describe each one.

The data layer holds a dao directory for raw data access operations, a database directory for the data infrastructure with a tables directory for sqflite table configuration, a database.dart for the sqflite related code and a shared_preferences_db.dart for the shared preferences side, and a repositories directory described as the repository implementation layer that coordinates business logic.

The domain layer holds models for the data, a repositories directory described as the repository abstraction layer that abstracts the business interfaces, and a use_cases directory for business use cases. So the repository pattern is applied in both directions, with an interface in the domain and an implementation in the data layer, which is the usual arrangement and is the point of the split.

The features directory is the view layer, with a home feature and the laboratory feature, and inside the laboratory the sub-features for 3D, FFI, games and the tilt experiment each with their own views.

Two details in the structure are worth noting because they show the project's tooling. The local data management is not a single choice: there is a sqflite database with configured tables and a shared preferences store, so the sample demonstrates both a relational local store and a key value store, with a repository that decides which to use. And the state management and routing layers sit alongside the three vertical layers rather than inside them, which is the arrangement where a feature screen and its provider live together.

## Running it: clone, fetch, run, and the integration test entry point

The start section is short and complete. The project is cloned, the dependencies are fetched, and the app is launched, with the more common run modes and a cache clean-up alongside:

```bash
$ git clone https://github.com/AmosHuKe/Mood-Example.git
$ flutter pub get
$ flutter run
```

```bash
$ flutter run --debug/release/profile/test
$ flutter clean
$ flutter test integration_test/app_test.dart --dart-define=test_mode=true
```

That last line is the interesting one. The integration test has a single entry point file at integration_test/app_test.dart, and the test run passes a Dart define called test_mode, which means the app is told it is running under test and can behave differently, for example by skipping the lock screen or the local notification setup. That is the standard Flutter pattern for making an app testable, and having it wired up in the sample means the integration test is a thing you can run, not just a thing you can read.

The development environment section records what the author used: Flutter on the stable channel at 3.47.4 on Windows and on macOS, with the Android toolchain at SDK version 37.0.0 for developing for Android devices. Both platforms are listed, and the badges confirm the Dart version of 3.13.3.

A note on the local package mirror. The README links the Flutter site in Chinese and English, and links both pub.dev and its Chinese mirror, pub-web.flutter-io.cn, which is the mirror to use if the default package host is slow from your network.

## Localisation, theming and the generated l10n bundles

The internationalisation section is the most instructive part of the documentation, and the structure it describes is the one Flutter recommends.

Inside lib there is an l10n directory holding the language packs, with a gen subdirectory that is generated rather than written, and an arb file per locale, the example being app_zh_CN.arb for Simplified Chinese. Next to it, under lib/shared/config, sits a language.dart file for the language configuration, and at the root of the project there is an l10n.yaml file that configures the whole mechanism. The README points at the official Flutter internationalisation tutorial in both its Chinese and English versions, which is the right reference because the generated directory and the arb format are part of the framework rather than of this project.

The practical consequence is that adding a language is a configuration change plus an arb file, and the localisation code is regenerated rather than hand-edited. That is the part worth learning here, since a hand-rolled translation map is the usual mistake.

The theme story is the same kind of checklist item. Multiple themes and dark mode are both on the list, which in Flutter means a theme definition with light and dark variants driven by colour variables rather than hard-coded colours, and the sample is a reasonable place to see how that is wired through the widget tree. The other features in this group, local notifications, animations and the app lock authentication, are the platform integration side of the same application.

## Versioning, licence and the shape of the repository

The licence is BSD-3-Clause, with a LICENSE file in the repository and a badge pointing at it. That is a permissive licence with the standard three-clause obligations, so you can reuse the code in a product with attribution and without any obligation to publish changes back, which is a reasonable position for a sample project that people are meant to copy from. This is a reading of the terms rather than legal advice.

The project publishes no GitHub releases, so there is no tag to pin and no release notes on the repository itself. The version lives in the README badge, at 1.9.14, and the change history is kept in CHANGELOG.md at the top of the repository, which is the file to consult before copying a feature out of it. The last push was on 2026-10-21.

The rest of the tree is the shape you would expect for a Flutter project with heavy native work: android and ios directories carrying the platform projects and the UniMPSDK integration, an assets directory, a hook directory for the FFI work, integration_test for the test entry point, and the Dart project files at the root, including pubspec.yaml with a matching pubspec.lock, l10n.yaml, analysis_options.yaml and a.metadata file.

The lock file and the analysis options are both signs of a project that expects to be opened in an editor and linted as part of a workflow, and the presence of a.github directory suggests the continuous integration side is handled there. For a learning repository, the important takeaway is that the sample is complete enough to run, lint and test end to end, which is more than a set of isolated widget demos would give you.

## Conclusion

Mood-Example fits a developer learning Flutter who wants one application that shows a realistic feature set, i18n with generated localisation bundles, a data, domain and features split, and an integration test entry point, all in a repository that can be cloned and run. It is the wrong starting point for a production mood tracker, since the author states plainly that many business rules are not realistic, and it is the wrong choice if you want a maintained application rather than a teaching artefact. Before building on it, read CHANGELOG.md against the version badge, expect the laboratory features to dominate the package size, and check the Flutter and Dart versions the project pins if your toolchain is newer.

## FAQ

### What is Mood-Example used for?

It is a Flutter 3 mood tracking sample project whose stated main purpose is learning and practice. The README notes that because it is a learning project, many business logics may not correspond to reality.

### How do I run the Mood-Example project?

Clone the repository, run flutter pub get to fetch the dependencies, and start it with flutter run, optionally in debug, release, profile or test mode. The development environment is Flutter on the stable channel at 3.47.4 with the Android toolchain at SDK version 37.0.0.

### How are the integration tests run in Mood-Example?

The test entry point is integration_test/app_test.dart and it is run with flutter test and a Dart define, test_mode=true, so the app knows it is running under test. The repository also documents flutter clean for clearing the build cache.

### Does Mood-Example include internationalisation?

Yes. Localisation is set up the way Flutter recommends, with arb language files in lib/l10n, a generated gen directory that is not hand-edited, a language configuration file at lib/shared/config/language.dart and an l10n.yaml at the project root.

### What is in the laboratory section of Mood-Example?

The laboratory covers a uniapp mini program running on UniMPSDK v4.85, a game collection built with Bonfire and Flame, a 3D city using obj format models, and asynchronous FFI calls to C and C++ through Hooks. The README says these features take up most of the app's package size.

## Sources

- [AmosHuKe/Mood-Example on GitHub](https://github.com/AmosHuKe/Mood-Example)
- [Issues](https://github.com/AmosHuKe/Mood-Example/issues)
- [License: BSD-3-Clause](https://github.com/AmosHuKe/Mood-Example/blob/main/LICENSE)
- [README](https://github.com/AmosHuKe/Mood-Example/blob/main/README.md)

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Hysen Labs editorial analysis, written from the project's own repository and release notes. Cite the canonical page: https://hysenlabs.com/projects/amoshuke-mood-example