feat: support Android 13+ ability to choose listen or not to broadcasts from other apps

README.md

@@ -11,6 +11,7 @@ First install the package via [pub.dev](https://pub.dev/packages/flutter_broadca
 ```dart
 BroadcastReceiver receiver = BroadcastReceiver(
   names: <String>["de.kevlatus.broadcast"],
+  listenToBroadcastsFromOtherApps: false,
 );
 receiver.messages.listen(print);
 receiver.start();

android/build.gradle

@@ -1,40 +1,42 @@
-group 'de.kevlatus.flutter_broadcasts'
-version '1.0-SNAPSHOT'
-
-buildscript {
-    ext.kotlin_version = '1.5.20'
-    repositories {
-        google()
-        jcenter()
-    }
-
-    dependencies {
-        classpath 'com.android.tools.build:gradle:7.4.0'
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-    }
-}
-
-rootProject.allprojects {
-    repositories {
-        google()
-        jcenter()
-    }
+plugins {
+    id 'com.android.library'
+    id 'kotlin-android'
 }
 
-apply plugin: 'com.android.library'
-apply plugin: 'kotlin-android'
+group = 'de.kevlatus.flutter_broadcasts'
+version = '1.0-SNAPSHOT'
 
 android {
-    compileSdkVersion 31
+    namespace 'de.kevlatus.flutter_broadcasts'
+    compileSdk = 34
+
+    defaultConfig {
+        minSdk = 24
+        targetSdk = 34
+    }
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
-    defaultConfig {
-        minSdkVersion 24
+
+    buildFeatures {
+        buildConfig = true
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+    kotlinOptions {
+        jvmTarget = "17"
     }
 }
 
+repositories {
+    google()
+    mavenCentral()
+}
+
 dependencies {
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.8.22"
 }

android/src/main/kotlin/de/kevlatus/flutter_broadcasts/FlutterBroadcastsPlugin.kt

@@ -4,6 +4,7 @@ import android.content.BroadcastReceiver
 import android.content.Context
 import android.content.Intent
 import android.content.IntentFilter
+import android.os.Build
 import android.util.Log
 import androidx.annotation.NonNull
 import io.flutter.embedding.engine.plugins.FlutterPlugin
@@ -17,6 +18,7 @@ import java.io.Serializable
 class CustomBroadcastReceiver(
         val id: Int,
         private val names: List<String>,
+        private val listenToBroadcastsFromOtherApps: Boolean,
         private val listener: (Any) -> Unit
 ) : BroadcastReceiver() {
     companion object {
@@ -46,7 +48,17 @@ class CustomBroadcastReceiver(
     }
 
     fun start(context: Context) {
-        context.registerReceiver(this, intentFilter)
+        if (Build.VERSION.SDK_INT >= 33) {
+            val receiverFlags = if (listenToBroadcastsFromOtherApps) {
+                Context.RECEIVER_EXPORTED
+            } else {
+                Context.RECEIVER_NOT_EXPORTED
+            }
+            context.registerReceiver(this, intentFilter, receiverFlags)
+        } else {
+            context.registerReceiver(this, intentFilter)
+        }
+
         Log.d(TAG, "starting to listen for broadcasts: " + names.joinToString(";"))
     }
 
@@ -95,15 +107,18 @@ class MethodCallHandlerImpl(
     private fun withReceiverArgs(
             call: MethodCall,
             result: Result,
-            func: (id: Int, names: List<String>) -> Unit
+            func: (id: Int, names: List<String>, listenToBroadcastsFromOtherApps: Boolean) -> Unit
     ) {
         val id = call.argument<Int>("id")
                 ?: return result.error("1", "no receiver id provided", null)
 
         val names = call.argument<List<String>>("names")
                 ?: return result.error("1", "no names provided", null)
 
-        func(id, names)
+        val listenToBroadcastsFromOtherApps = call.argument<Boolean>("listenToBroadcastsFromOtherApps")
+            ?: return result.error("1", "listenToBroadcastsFromOtherApps is not provided", null)
+
+        func(id, names, listenToBroadcastsFromOtherApps)
     }
 
     private fun withBroadcastArgs(
@@ -118,16 +133,16 @@ class MethodCallHandlerImpl(
     }
 
     private fun onStartReceiver(call: MethodCall, result: Result) {
-        withReceiverArgs(call, result) { id, names ->
-            broadcastManager.startReceiver(CustomBroadcastReceiver(id, names) { broadcast ->
+        withReceiverArgs(call, result) { id, names, listenToBroadcastsFromOtherApps ->
+            broadcastManager.startReceiver(CustomBroadcastReceiver(id, names, listenToBroadcastsFromOtherApps) { broadcast ->
                 channel?.invokeMethod("receiveBroadcast", broadcast)
             })
             result.success(null)
         }
     }
 
     private fun onStopReceiver(call: MethodCall, result: Result) {
-        withReceiverArgs(call, result) { id, _ ->
+        withReceiverArgs(call, result) { id, _, _ ->
             broadcastManager.stopReceiver(id)
             result.success(null)
         }

example/android/app/build.gradle

@@ -36,8 +36,8 @@ android {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "de.kevlatus.flutter_broadcasts_example"
         minSdkVersion 24
-        targetSdkVersion 33
-        compileSdkVersion 31
+        targetSdkVersion 34
+        compileSdkVersion 34
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }

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

@@ -9,7 +9,8 @@
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
-            android:windowSoftInputMode="adjustResize">
+            android:windowSoftInputMode="adjustResize"
+            android:exported="true">
             <!-- Specifies an Android theme to apply to this Activity as soon as
                  the Android process has started. This theme is visible to the user
                  while the Flutter UI initializes. After that, this theme continues

example/android/build.gradle

@@ -26,6 +26,6 @@ subprojects {
     project.evaluationDependsOn(':app')
 }
 
-task clean(type: Delete) {
+tasks.register("clean", Delete) {
     delete rootProject.buildDir
 }

lib/src/receiver.dart

@@ -19,12 +19,20 @@ class BroadcastReceiver {
   /// See [BroadcastMessage.name] for more details.
   final List<String> names;
 
+  /// Allow receiver to listen to broadcasts from other apps
+  ///
+  /// Android specific. Requires SDK 33+
+  final bool listenToBroadcastsFromOtherApps;
+
   StreamSubscription? _subscription;
 
   /// Creates a new [BroadcastReceiver], which subscribes to the given [names].
   ///
   /// At least one name needs to be provided.
-  BroadcastReceiver({required this.names})
+  BroadcastReceiver({
+    required this.names,
+    this.listenToBroadcastsFromOtherApps = true,
+  })
       : assert(names.length > 0),
         _id = ++_index;
 
@@ -63,6 +71,7 @@ class BroadcastReceiver {
   Map<String, dynamic> toMap() => <String, dynamic>{
         'id': _id,
         'names': names,
+        'listenToBroadcastsFromOtherApps': listenToBroadcastsFromOtherApps,
       };
 
   @override
@@ -74,6 +83,7 @@ class BroadcastReceiver {
   int get hashCode =>
       _id.hashCode ^
       names.hashCode ^
+      listenToBroadcastsFromOtherApps.hashCode ^
       _subscription.hashCode ^
       _messages.hashCode;
 
@@ -83,6 +93,7 @@ class BroadcastReceiver {
         other is BroadcastReceiver &&
             other._id == _id &&
             other.names == names &&
+            other.listenToBroadcastsFromOtherApps == listenToBroadcastsFromOtherApps &&
             other._messages == _messages &&
             other._subscription == _subscription;
   }