Table of contents

• Table of contents
• Backstory
• Screenshots
• Development
• Contribution
• iOS Limitations

Backstory

Some time ago I've started developing the Material Lightmeter app. Unfortunately, the last update of this app was almost a year prior to creation of this repo. So after reading some positive review on Google Play saying that "this is an excellent app, too bad it is no longer updated", I've decided to make an update and also make this app open source. Maybe someone sometime will decide to contribute to this project.

But as the existing repo contained some sensitive data, that I've pushed due to lack of experience, I had to make a new one. And if creating a new repo, why not rewrite the app from scratch?

Without further delay behold my new Lightmeter app inspired by Material You (a.k.a. M3)

Screenshots

Development

1. Install Flutter

To build this app you need to install Flutter 3.10.0 stable. How to install.

3. Project setup

As part of the app's functionallity is in the private repo, you have to replace these lines in pubspec.yaml:

m3_lightmeter_iap:
  git:
    url: "https://github.com/vodemn/m3_lightmeter_iap"
    ref: main

with these:

m3_lightmeter_iap:
  path: iap

You can do it simply by running the script:

sh .github/scripts/stub_iap.sh

If you are using VSCode, you can open the workspace like so: File -> Open Workspace from File -> m3_lightmeter.code-workspace. Otherwise you have to run flutter pub get command from the iap folder.

Then you can fetch all the neccessary dependencies and generate translation files by running the following commands:

flutter pub get
flutter pub run intl_utils:generate

4. (Optional) Install Firebase

Out of the box Firebase Crashlytics won't work. If you want to add Crashlytics to your local build please follow this guide.

5. Build

Android

You can build an apk by running the following command from the root of the repository:

flutter build apk --release --flavor dev --dart-define cameraPreviewAspectRatio=240/320 -t lib/main_dev.dart

iOS

TBD

Contribution

To report a bug or suggest a new feature open a new issue.

In case you want to help develop this project feel free to open a Pull Request, but you need to follow this style guide.

iOS Limitations

A list of features, that Android version of the app has and that iOS does not.

Incident light metering

Apple does not provide API for reading Lux stream form the ambient light sensor. Lux can be calculated based on front camera image stream, but this would be a reflected light. So there is no way incident light metering can be implemented on iOS.

Volume buttons action

This can be implemented but the app will be rejected due to 2.5.9