initial working functionality

- `pupsec`: added `>=2.12.0` constraints to `environment.sdk`
- `ReceivedIntent`: added
- `ReceiveIntent`: `getInitialIntent`, `receivedIntentStream` and `giveResult` added
- `example`: simple working example added
- `ReceiveIntentPlugin`: handling `getInitialIntent` and `giveResult` methods and sending "newIntent" events

.gitignore

@@ -5,3 +5,6 @@
 .pub/
 
 build/
+
+# Flutter related
+**/pubspec.lock

android/src/main/kotlin/com/bhikadia/receive_intent/ReceiveIntentPlugin.kt

@@ -1,36 +1,130 @@
 package com.bhikadia.receive_intent
 
+import android.app.Activity
+import android.content.Context
+import android.content.Intent
 import androidx.annotation.NonNull
-
 import io.flutter.embedding.engine.plugins.FlutterPlugin
+import io.flutter.embedding.engine.plugins.activity.ActivityAware
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding
+import io.flutter.plugin.common.EventChannel
+import io.flutter.plugin.common.EventChannel.EventSink
 import io.flutter.plugin.common.MethodCall
 import io.flutter.plugin.common.MethodChannel
 import io.flutter.plugin.common.MethodChannel.MethodCallHandler
 import io.flutter.plugin.common.MethodChannel.Result
-import io.flutter.plugin.common.PluginRegistry.Registrar
+
 
 /** ReceiveIntentPlugin */
-class ReceiveIntentPlugin: FlutterPlugin, MethodCallHandler {
+class ReceiveIntentPlugin : FlutterPlugin, MethodCallHandler, EventChannel.StreamHandler, ActivityAware {
     /// The MethodChannel that will the communication between Flutter and native Android
     ///
     /// This local reference serves to register the plugin with the Flutter Engine and unregister it
     /// when the Flutter Engine is detached from the Activity
-  private lateinit var channel : MethodChannel
+    private lateinit var methodChannel: MethodChannel
+    private lateinit var eventChannel: EventChannel
+    private var eventSink: EventSink? = null
+
+    private lateinit var context: Context
+    private var activity: Activity? = null;
+
+
+    private var initialIntentMap: Map<String, Any?>? = null
+    private var latestIntentMap: Map<String, Any?>? = null
+    private var initialIntent = true
+
+    private fun intentToMap(intent: Intent, fromPackageName: String?): Map<String, Any?> {
+        return mapOf(
+                "fromPackageName" to fromPackageName,
+                "fromSignatures" to fromPackageName?.let { getApplicationSignature(context, it) },
+                "action" to intent.action,
+                "data" to intent.dataString,
+                "categories" to intent.categories,
+                "extra" to intent.extras?.let { bundleToMap(it) }
+        )
+    }
+
+    private fun handleIntent(intent: Intent, fromPackageName: String?) {
+        if (initialIntent) {
+            initialIntentMap = intentToMap(intent, fromPackageName)
+            initialIntent = false
+        }
+        latestIntentMap = intentToMap(intent, fromPackageName)
+        eventSink?.success(latestIntentMap)
+    }
+
+    private fun giveResult(result: Result, resultCode: Int?, data: Map<String, Any?>?) {
+        if (resultCode != null) {
+            if (data == null)
+                activity?.setResult(resultCode)
+            else
+                activity?.setResult(resultCode, mapToIntent(data))
+            result.success(null)
+        }
+        result.error("InvalidArg", "resultCode can not be null", null)
+    }
+
 
     override fun onAttachedToEngine(@NonNull flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
-    channel = MethodChannel(flutterPluginBinding.binaryMessenger, "receive_intent")
+        context = flutterPluginBinding.applicationContext
-    channel.setMethodCallHandler(this)
+
+        methodChannel = MethodChannel(flutterPluginBinding.binaryMessenger, "receive_intent")
+        methodChannel.setMethodCallHandler(this)
+
+        eventChannel = EventChannel(flutterPluginBinding.binaryMessenger, "receive_intent/event")
+        eventChannel.setStreamHandler(this)
     }
 
     override fun onMethodCall(@NonNull call: MethodCall, @NonNull result: Result) {
-    if (call.method == "getPlatformVersion") {
+        when (call.method) {
-      result.success("Android ${android.os.Build.VERSION.RELEASE}")
+            "getInitialIntent" -> {
-    } else {
+                result.success(initialIntentMap)
+            }
+            "giveResult" -> {
+                giveResult(result, call.argument("resultCode"), call.argument("data"))
+            }
+            else -> {
                 result.notImplemented()
             }
         }
+    }
+
+    override fun onListen(arguments: Any?, events: EventSink?) {
+        eventSink = events
+    }
+
+    override fun onCancel(arguments: Any?) {
+        eventSink = null
+    }
 
     override fun onDetachedFromEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
-    channel.setMethodCallHandler(null)
+        methodChannel.setMethodCallHandler(null)
+        eventChannel.setStreamHandler(null)
+    }
+
+    override fun onAttachedToActivity(binding: ActivityPluginBinding) {
+        activity = binding.activity
+        binding.addOnNewIntentListener(fun(intent: Intent?): Boolean {
+            intent?.let { handleIntent(it, binding.activity.callingActivity?.packageName) }
+            return false;
+        })
+        handleIntent(binding.activity.intent, binding.activity.callingActivity?.packageName)
+    }
+
+    override fun onDetachedFromActivityForConfigChanges() {
+        activity = null;
+    }
+
+    override fun onReattachedToActivityForConfigChanges(binding: ActivityPluginBinding) {
+        activity = binding.activity
+        binding.addOnNewIntentListener(fun(intent: Intent?): Boolean {
+            intent?.let { handleIntent(it, binding.activity.callingActivity?.packageName) }
+            return false;
+        })
+        handleIntent(binding.activity.intent, binding.activity.callingActivity?.packageName)
+    }
+
+    override fun onDetachedFromActivity() {
+        activity = null;
     }
 }

android/src/main/kotlin/com/bhikadia/receive_intent/Utils.kt

@@ -0,0 +1,96 @@
+package com.bhikadia.receive_intent
+
+import android.content.Context
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.os.Build
+import android.os.Bundle
+import android.os.Parcelable
+import java.security.MessageDigest
+
+fun mapToBundle(map: Map<String, Any?>): Bundle {
+    val bundle = Bundle();
+    map.forEach {
+        val k = it.key
+        val v = it.value
+        when (v) {
+            is Byte -> bundle.putByte(k, v)
+            is ByteArray -> bundle.putByteArray(k, v)
+            is Char -> bundle.putChar(k, v)
+            is CharArray -> bundle.putCharArray(k, v)
+            is CharSequence -> bundle.putCharSequence(k, v)
+            is Float -> bundle.putFloat(k, v)
+            is FloatArray -> bundle.putFloatArray(k, v)
+            is Parcelable -> bundle.putParcelable(k, v)
+            is Short -> bundle.putShort(k, v)
+            is ShortArray -> bundle.putShortArray(k, v)
+            else -> throw IllegalArgumentException("$v is of a type that is not currently supported")
+        }
+    }
+    return bundle;
+}
+
+fun mapToIntent(map: Map<String, Any?>): Intent = Intent().apply {
+    putExtras(mapToBundle(map))
+}
+
+
+fun bundleToMap(extras: Bundle): Map<String, Any?> {
+    val map: MutableMap<String, Any?> = HashMap()
+    val ks = extras.keySet()
+    val iterator: Iterator<String> = ks.iterator()
+    while (iterator.hasNext()) {
+        val key = iterator.next()
+        map[key] = extras.get(key)
+    }
+    return map
+}
+
+fun getApplicationSignature(context: Context, packageName: String): List<String> {
+    val signatureList: List<String>
+    try {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+            // New signature
+            val sig = context.packageManager.getPackageInfo(packageName, PackageManager.GET_SIGNING_CERTIFICATES).signingInfo
+            signatureList = if (sig.hasMultipleSigners()) {
+                // Send all with apkContentsSigners
+                sig.apkContentsSigners.map {
+                    val digest = MessageDigest.getInstance("SHA")
+                    digest.update(it.toByteArray())
+                    bytesToHex(digest.digest())
+                }
+            } else {
+                // Send one with signingCertificateHistory
+                sig.signingCertificateHistory.map {
+                    val digest = MessageDigest.getInstance("SHA")
+                    digest.update(it.toByteArray())
+                    bytesToHex(digest.digest())
+                }
+            }
+        } else {
+            val sig = context.packageManager.getPackageInfo(packageName, PackageManager.GET_SIGNATURES).signatures
+            signatureList = sig.map {
+                val digest = MessageDigest.getInstance("SHA")
+                digest.update(it.toByteArray())
+                bytesToHex(digest.digest())
+            }
+        }
+
+        return signatureList
+    } catch (e: Exception) {
+        // Handle error
+    }
+    return emptyList()
+}
+
+fun bytesToHex(bytes: ByteArray): String {
+    val hexArray = charArrayOf('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F')
+    val hexChars = CharArray(bytes.size * 2)
+    var v: Int
+    for (j in bytes.indices) {
+        v = bytes[j].toInt() and 0xFF
+        hexChars[j * 2] = hexArray[v.ushr(4)]
+        hexChars[j * 2 + 1] = hexArray[v and 0x0F]
+    }
+    return String(hexChars)
+}

example/android/app/src/main/AndroidManifest.xml

@@ -31,6 +31,10 @@
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
+            <intent-filter>
+                <action android:name="RECEIVE_INTENT_EXAMPLE_ACTION" />
+                <category android:name="android.intent.category.DEFAULT"/>
+            </intent-filter>
         </activity>
         <!-- Don't delete the meta-data below.
              This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->

example/lib/main.dart

@@ -1,7 +1,6 @@
-import 'package:flutter/material.dart';
 import 'dart:async';
 
-import 'package:flutter/services.dart';
+import 'package:flutter/material.dart';
 import 'package:receive_intent/receive_intent.dart';
 
 void main() {
@@ -14,34 +13,39 @@ class MyApp extends StatefulWidget {
 }
 
 class _MyAppState extends State<MyApp> {
-  String _platformVersion = 'Unknown';
+  ReceivedIntent _initialIntent;
 
   @override
   void initState() {
     super.initState();
-    initPlatformState();
+    _init();
   }
 
-  // Platform messages are asynchronous, so we initialize in an async method.
+  Future<void> _init() async {
-  Future<void> initPlatformState() async {
+    final receivedIntent = await ReceiveIntent.getInitialIntent();
-    String platformVersion;
-    // Platform messages may fail, so we use a try/catch PlatformException.
-    try {
-      platformVersion = await ReceiveIntent.platformVersion;
-    } on PlatformException {
-      platformVersion = 'Failed to get platform version.';
-    }
 
-    // If the widget was removed from the tree while the asynchronous platform
-    // message was in flight, we want to discard the reply rather than calling
-    // setState to update our non-existent appearance.
     if (!mounted) return;
 
     setState(() {
-      _platformVersion = platformVersion;
+      _initialIntent = receivedIntent;
     });
   }
 
+  Widget _buildFromIntent(String label, ReceivedIntent intent) {
+    return Center(
+      child: Column(
+        children: [
+          Text(label),
+          Text(
+              "fromPackage: ${intent?.fromPackageName}\nfromSignatures: ${_initialIntent?.fromSignatures}"),
+          Text(
+              'action: ${_initialIntent?.action}\ndata: ${_initialIntent?.data}\ncategories: ${_initialIntent?.categories}'),
+          Text("extras: ${_initialIntent?.extra}")
+        ],
+      ),
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
@@ -49,8 +53,19 @@ class _MyAppState extends State<MyApp> {
         appBar: AppBar(
           title: const Text('Plugin example app'),
         ),
-        body: Center(
+        body: Padding(
-          child: Text('Running on: $_platformVersion\n'),
+          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 20),
+          child: Column(
+            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+            children: [
+              _buildFromIntent("INITIAL", _initialIntent),
+              StreamBuilder<ReceivedIntent>(
+                stream: ReceiveIntent.receivedIntentStream,
+                builder: (context, snapshot) =>
+                    _buildFromIntent("STREAMED", snapshot.data),
+              )
+            ],
+          ),
         ),
       ),
     );

example/pubspec.lock

@@ -1,161 +0,0 @@
-# Generated by pub
-# See https://dart.dev/tools/pub/glossary#lockfile
-packages:
-  async:
-    dependency: transitive
-    description:
-      name: async
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.5.0"
-  boolean_selector:
-    dependency: transitive
-    description:
-      name: boolean_selector
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.0"
-  characters:
-    dependency: transitive
-    description:
-      name: characters
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.0"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.0"
-  clock:
-    dependency: transitive
-    description:
-      name: clock
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.0"
-  collection:
-    dependency: transitive
-    description:
-      name: collection
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.15.0"
-  cupertino_icons:
-    dependency: "direct main"
-    description:
-      name: cupertino_icons
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.2"
-  fake_async:
-    dependency: transitive
-    description:
-      name: fake_async
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.0"
-  flutter:
-    dependency: "direct main"
-    description: flutter
-    source: sdk
-    version: "0.0.0"
-  flutter_test:
-    dependency: "direct dev"
-    description: flutter
-    source: sdk
-    version: "0.0.0"
-  matcher:
-    dependency: transitive
-    description:
-      name: matcher
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.12.10"
-  meta:
-    dependency: transitive
-    description:
-      name: meta
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.0"
-  path:
-    dependency: transitive
-    description:
-      name: path
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.8.0"
-  receive_intent:
-    dependency: "direct main"
-    description:
-      path: ".."
-      relative: true
-    source: path
-    version: "0.0.1"
-  sky_engine:
-    dependency: transitive
-    description: flutter
-    source: sdk
-    version: "0.0.99"
-  source_span:
-    dependency: transitive
-    description:
-      name: source_span
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.8.0"
-  stack_trace:
-    dependency: transitive
-    description:
-      name: stack_trace
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.10.0"
-  stream_channel:
-    dependency: transitive
-    description:
-      name: stream_channel
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.0"
-  string_scanner:
-    dependency: transitive
-    description:
-      name: string_scanner
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.0"
-  term_glyph:
-    dependency: transitive
-    description:
-      name: term_glyph
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.0"
-  test_api:
-    dependency: transitive
-    description:
-      name: test_api
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.19"
-  typed_data:
-    dependency: transitive
-    description:
-      name: typed_data
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.0"
-  vector_math:
-    dependency: transitive
-    description:
-      name: vector_math
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.0"
-sdks:
-  dart: ">=2.12.0-0.0 <3.0.0"
-  flutter: ">=1.20.0"

lib/receive_intent.dart

@@ -1,14 +1,53 @@
-
 import 'dart:async';
 
 import 'package:flutter/services.dart';
 
-class ReceiveIntent {
+class ReceivedIntent {
-  static const MethodChannel _channel =
+  final String? fromPackageName;
-      const MethodChannel('receive_intent');
+  final List<String>? fromSignatures;
+  final String action;
+  final String? data;
+  final List<String>? categories;
+  final Map<String, dynamic>? extra;
 
-  static Future<String> get platformVersion async {
+  const ReceivedIntent({
-    final String version = await _channel.invokeMethod('getPlatformVersion');
+    this.fromPackageName,
-    return version;
+    this.fromSignatures,
+    required this.action,
+    this.data,
+    this.categories,
+    this.extra,
+  });
+
+  factory ReceivedIntent.fromMap(Map? map) => ReceivedIntent(
+        fromPackageName: map?["fromPackageName"],
+        fromSignatures: map?["fromSignatures"],
+        action: map?["action"],
+        data: map?["data"],
+        categories: map?["categories"],
+        extra: (map?["extra"] as Map?)?.map<String, dynamic>(
+            (key, value) => MapEntry(key.toString(), value)),
+      );
+}
+
+class ReceiveIntent {
+  static const MethodChannel _methodChannel =
+      const MethodChannel('receive_intent');
+  static const EventChannel _eventChannel =
+      const EventChannel("receive_intent/event");
+
+  static Future<ReceivedIntent?> getInitialIntent() async {
+    final renameMap = await _methodChannel.invokeMapMethod('getInitialIntent');
+    print("result: $renameMap");
+    return ReceivedIntent.fromMap(renameMap);
+  }
+
+  static Stream<ReceivedIntent?> receivedIntentStream = _eventChannel
+      .receiveBroadcastStream()
+      .map<ReceivedIntent?>((event) => ReceivedIntent.fromMap(event as Map?));
+
+  static Future<void> giveResult(int resultCode, {Map? data}) async {
+    await _methodChannel.invokeMethod('giveResult',
+        <String, dynamic>{"resultCode": resultCode, "data": data});
   }
 }

pubspec.lock

@@ -1,147 +0,0 @@
-# Generated by pub
-# See https://dart.dev/tools/pub/glossary#lockfile
-packages:
-  async:
-    dependency: transitive
-    description:
-      name: async
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.5.0"
-  boolean_selector:
-    dependency: transitive
-    description:
-      name: boolean_selector
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.0"
-  characters:
-    dependency: transitive
-    description:
-      name: characters
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.0"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.0"
-  clock:
-    dependency: transitive
-    description:
-      name: clock
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.0"
-  collection:
-    dependency: transitive
-    description:
-      name: collection
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.15.0"
-  fake_async:
-    dependency: transitive
-    description:
-      name: fake_async
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.0"
-  flutter:
-    dependency: "direct main"
-    description: flutter
-    source: sdk
-    version: "0.0.0"
-  flutter_test:
-    dependency: "direct dev"
-    description: flutter
-    source: sdk
-    version: "0.0.0"
-  matcher:
-    dependency: transitive
-    description:
-      name: matcher
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.12.10"
-  meta:
-    dependency: transitive
-    description:
-      name: meta
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.0"
-  path:
-    dependency: transitive
-    description:
-      name: path
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.8.0"
-  sky_engine:
-    dependency: transitive
-    description: flutter
-    source: sdk
-    version: "0.0.99"
-  source_span:
-    dependency: transitive
-    description:
-      name: source_span
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.8.0"
-  stack_trace:
-    dependency: transitive
-    description:
-      name: stack_trace
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.10.0"
-  stream_channel:
-    dependency: transitive
-    description:
-      name: stream_channel
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.0"
-  string_scanner:
-    dependency: transitive
-    description:
-      name: string_scanner
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.0"
-  term_glyph:
-    dependency: transitive
-    description:
-      name: term_glyph
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.2.0"
-  test_api:
-    dependency: transitive
-    description:
-      name: test_api
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.19"
-  typed_data:
-    dependency: transitive
-    description:
-      name: typed_data
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.0"
-  vector_math:
-    dependency: transitive
-    description:
-      name: vector_math
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.0"
-sdks:
-  dart: ">=2.12.0-0.0 <3.0.0"
-  flutter: ">=1.20.0"

pubspec.yaml

@@ -5,7 +5,7 @@ author:
 homepage:
 
 environment:
-  sdk: ">=2.7.0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
   flutter: ">=1.20.0"
 
 dependencies:

test/receive_intent_test.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
-import 'package:receive_intent/receive_intent.dart';
 
 void main() {
   const MethodChannel channel = MethodChannel('receive_intent');
@@ -17,7 +16,7 @@ void main() {
     channel.setMockMethodCallHandler(null);
   });
 
-  test('getPlatformVersion', () async {
+  // test('getPlatformVersion', () async {
-    expect(await ReceiveIntent.platformVersion, '42');
+  //   expect(await ReceiveIntent.platformVersion, '42');
-  });
+  // });
 }