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168 lines
No EOL
9.7 KiB
Markdown
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# receive_intent
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<p>
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<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
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<a href="#contributors-"><img src="https://img.shields.io/badge/all_contributors-1-orange.svg" alt="All Contributors" /></a>
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<!-- ALL-CONTRIBUTORS-BADGE:END -->
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<a href="https://pub.dev/packages/receive_intent"><img src="https://img.shields.io/pub/v/receive_intent?logo=dart" alt="pub.dev"></a>
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<a href="https://github.com/daadu/receive_intent/actions?query=workflow%3Aanalysis"><img src="https://github.com/daadu/receive_intent/workflows/analysis/badge.svg" alt="analysis"></a>
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<a href="https://pub.dev/packages/receive_intent/score"><img src="https://badges.bar/receive_intent/pub%20points" alt="pub points"></a>
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<a href="https://pub.dev/packages/receive_intent/score"><img src="https://badges.bar/receive_intent/popularity" alt="popularity"></a>
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<a href="https://pub.dev/packages/receive_intent/score"><img src="https://badges.bar/receive_intent/likes" alt="likes"></a>
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<a href="https://github.com/daadu/receive_intent/issues"><img src="https://img.shields.io/github/issues/daadu/receive_intent?logo=github" alt="GitHub issues"></a>
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<a href="https://github.com/daadu/receive_intent/milestone/1"><img src="https://img.shields.io/github/milestones/progress-percent/daadu/receive_intent/1?logo=github" alt="GitHub milestone"></a>
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<a href="https://github.com/daadu/receive_intent/stargazers"><img src="https://img.shields.io/github/stars/daadu/receive_intent?logo=github" alt="GitHub stars"></a>
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<a href="https://github.com/daadu/receive_intent/network"><img src="https://img.shields.io/github/forks/daadu/receive_intent?logo=github" alt="GitHub forks"></a></p>
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</p>
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A Flutter plugin to pass Android Intents to the Flutter environment.
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`Intent` in Android is the "payload" for the communication between and within apps. This plugin passes the `Intent`, that "started" the `Activity` to the flutter environment. It also passes any "new Intents" that are received (via [`Activity.onNewIntent`](https://developer.android.com/reference/android/app/Activity#onNewIntent(android.content.Intent))) while the `Activity` is already "started".
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If the `Intent` was "started" via `startActivityForResult`, then this plugin also sends additional information (package name and app signature) about the "calling" Android Component, and can send "result" back (via [`Activity.setResult`](https://developer.android.com/reference/android/app/Activity#setResult(int))) to it.
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This plugin is in active development.
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___Any contribution, idea, criticism or feedback is welcomed.___
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## Quick links
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| __package__ | https://pub.dev/packages/receive_intent |
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| __Git Repo__ | https://github.com/daadu/receive_intent |
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| __Issue Tracker__ | https://github.com/daadu/receive_intent/issues |
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## Use cases
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- [OAuth based App Flip](https://developers.google.com/identity/account-linking/app-flip-overview) - This was the initial motivation for this plugin. The plugin can be used to pass the `Intent` sent by Google App to the flutter environment - where the consent UI is shown - once it is authorized (or not), the result is sent back to the Google App.
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- Deeplink/Applink - This plugin is a generic implementation of [uni_links](https://pub.dev/packages/uni_links) plugin. While this plugin passes "any" Intents, `uni_links` only passes app-link/deep-link Intents.
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- Receive Share Intents - This plugin is a generic implementation of [receive_sharing_intent](https://pub.dev/packages/receive_sharing_intent) plugin. While this plugin passes "any" Intents, `receive_sharing_intent` only passes "android.intent.action.SEND" (or related) Intents.
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- In general, if you want other apps to "start" your app, then this plugin can pass the `Intent` that "triggered" it to the flutter environment of the app. These `Intent` will give the app understanding of why the app was started. Check [Getting started](#getting-started) section to implement this.
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## Getting started
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#### Add `<intent-filter>` to `AndroidMainfest.xml`
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You need to add `<intent-filter>` to `android/app/src/main/AndroidManifest.xml` file:
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```xml
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<manifest ...>
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<!-- ... other tags -->
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<application ...>
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<activity ...>
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<!-- ... other tags -->
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<!-- Describe Intent your app can receive with <intent-filter> -->
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<intent-filter>
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<action android:name="RECEIVE_INTENT_EXAMPLE_ACTION" />
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<category android:name="android.intent.category.DEFAULT"/>
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</intent-filter>
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</activity>
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</application>
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</manifest>
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```
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In this example we want to receive Intent with `action` matching `RECEIVE_INTENT_EXAMPLE_ACTION` literal. This `<intent-filter>` should be added to the `Activity` that extends `FlutterActivity` (for project generated from template it is `MainActivity`).
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To read more about "Intent and Intent Filter", encourage you to check [official docs](https://developer.android.com/guide/components/intents-filters) from Android.
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#### Recevie and handle Intent that launched the Activity in Flutter
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Inside flutter code, you can call `ReceiveIntent.getInitialIntent()` to get the `Intent` that started the `Activity`:
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```dart
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import 'package:receive_intent/receive_intent.dart';
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// ...
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Future<void> _initReceiveIntent() async {
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// Platform messages may fail, so we use a try/catch PlatformException.
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try {
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final receivedIntent = await ReceiveIntent.getInitialIntent();
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// Validate receivedIntent and warn the user, if it is not correct,
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// but keep in mind it could be `null` or "empty"(`receivedIntent.isNull`).
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} on PlatformException {
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// Handle exception
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}
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}
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// ...
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```
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#### Listen for any new Intent while the Activity is already running
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To listen to new `Intent` while the `Activity` is running, you can use the `ReceiveIntent.receivedIntentStream` stream:
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```dart
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import 'package:receive_intent/receive_intent.dart';
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// ...
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StreamSubscription _sub;
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Future<void> _initReceiveIntentit() async {
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// ... check initialIntent
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// Attach a listener to the stream
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_sub = ReceiveIntent.receivedIntentStream.listen((Intent? intent) {
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// Validate receivedIntent and warn the user, if it is not correct,
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}, onError: (err) {
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// Handle exception
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});
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// NOTE: Don't forget to call _sub.cancel() in dispose()
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}
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// ...
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```
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#### Send result to the calling Activity (Optional)
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If the calling `Activty` has "started" this activity with `startActivityWithResult` then you can send back result to that activity when ready with `ReceiveIntent.setResult`:
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```dart
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import 'package:receive_intent/receive_intent.dart';
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// ...
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Future<void> _setActivityResult() async {
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// ...
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await ReceiveIntent.setResult(kActivityResultOk, data: {"sum": 123})
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}
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// ...
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```
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You can read more about "Starting Activities and Getting Results" pattern, encourage you to check [official docs](https://developer.android.com/reference/android/app/Activity#starting-activities-and-getting-results) from Android.
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Additionaly, in the case of activity started with `startActivityWithResult`, the `Intent` object will also have package name (`intent.fromPackageName`) and app signautres (`intent.fromSignatures`) of the calling activity. This could be used to validate the calling app, so that sensitive information is not given to unintendent apps.
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#### Tools to test it
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You can test this with either [`adb`](https://developer.android.com/studio/command-line/adb) or [Intent Test](https://play.google.com/store/apps/details?id=com.applauncher.applauncher) app form Playstore.
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##### abd
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To invoke (start) our `FlutterAcitivity` with `RECEIVE_INTENT_EXAMPLE_ACTION` intent action name as mentioned in example `<intent-filter>` [above](#add-intent-filter-to-AndroidMainfest.xml):
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```sh
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adb shell 'am start -W -a RECEIVE_INTENT_EXAMPLE_ACTION -c android.intent.category.DEFAULT'
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```
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If you don't have [`adb`](https://developer.android.com/studio/command-line/adb) in your path, but have `$ANDROID_HOME` env variable then use `"$ANDROID_HOME"/platform-tools/adb ...`.
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Note: Alternatively you could simply enter an `adb shell` and run the [`am`](https://developer.android.com/studio/command-line/adb#am) commands in it.
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#### Check example app
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To know more or to get the working code check the [example app](https://github.com/daadu/receive_intent/tree/master/example).
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## Todo
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- Document API references properly
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- Receive Intent for non-`Activity` based `intent-filter` (`BroadcastReceiver`, `Service`)
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- Automatic testing
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## Contribute
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Check the [Todo](#todo) section above, before you begin with any contribution.
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1. You'll need a GitHub account.
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2. Fork the [repository](https://github.com/daadu/receive_intent).
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3. Pick an issue to work on from [issue tracker](https://github.com/daadu/receive_intent/issues).
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4. Implement it.
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5. Add your name and email in `authors` section in `pubspec.yaml` file.
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6. Send merge request.
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7. Star this project.
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8. Become a hero!!
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## Features and bugs
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Please file feature requests and bugs at the [issue tracker](https://github.com/daadu/receive_intent/issues).
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## Contributors ✨
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Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):
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<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
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<!-- prettier-ignore-start -->
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<!-- markdownlint-disable -->
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<table>
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<tr>
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<td align="center"><a href="https://bhikadia.com/"><img src="https://avatars.githubusercontent.com/u/4963236?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Harsh Bhikadia</b></sub></a><br /><a href="#ideas-daadu" title="Ideas, Planning, & Feedback">🤔</a> <a href="https://github.com/daadu/receive_intent/commits?author=daadu" title="Code">💻</a></td>
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</tr>
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</table>
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<!-- markdownlint-restore -->
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<!-- prettier-ignore-end -->
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<!-- ALL-CONTRIBUTORS-LIST:END -->
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This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome! |