fix false “no email Managers available” on Android 11+ (SENDTO without attachments)

CHANGELOG.md

@@ -1,3 +1,9 @@
+### 3.0.2
+  [Android] Fix false "no email Managers available" when sending without attachments on Android 11+ by removing
+           PackageManager pre-query for ACTION_SENDTO and launching intent directly
+  [Example] Migrate Android build to Flutter's declarative Gradle plugin (dev.flutter.flutter-plugin-loader /
+           dev.flutter.flutter-gradle-plugin), update to Android compileSdk 36, and migrate embedding to v2.
+
 ### 3.0.1
   [root] add analysis options
   [test] remove usage of deprecated `setMockMethodCallHandler` in tests

android/src/main/java/com/dataxad/flutter_mailer/MethodCallHandlerImpl.java

@@ -4,8 +4,8 @@
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
+import android.content.ActivityNotFoundException;
 import android.content.pm.PackageManager;
-import android.content.pm.ResolveInfo;
 
 import android.net.Uri;
 import android.os.Build;
@@ -70,7 +70,12 @@ public void onMethodCall(@NonNull MethodCall call, @NonNull MethodChannel.Result
             mResult = result;
             try {
                 final Intent intent = mail(call);
-                activity.startActivityForResult(intent, MAIL_ACTIVITY_REQUEST_CODE);
+                try {
+                    activity.startActivityForResult(intent, MAIL_ACTIVITY_REQUEST_CODE);
+                } catch (ActivityNotFoundException e) {
+                    result.error("not_available", "no email Managers available", null);
+                    mResult = null;
+                }
             } catch (FlutterMailerException e) {
                 result.error(e.errorCode, e.errorMessage, e.errorDetails);
                 mResult = null;
@@ -164,20 +169,13 @@ private Intent mail(MethodCall options) throws FlutterMailerException {
             }
         }
 
-        PackageManager manager = context.getPackageManager();
-        List<ResolveInfo> list = manager.queryIntentActivities(intent, 0);
-
-        if (list == null || list.size() == 0) {
-            Log.e(TAG, "size is null or Zero");
-            throw new FlutterMailerException("not_available", "no email Managers available", null);
-        }
-
-        if (list.size() == 1) {
-            return intent;
-        } else if (options.hasArgument(APP_SCHEMA) && options.argument(APP_SCHEMA) != null && isAppInstalled((String) options.argument(APP_SCHEMA))) {
+        // If a specific package schema is requested, set it directly and let the system
+        // resolve it; avoid pre-querying PackageManager to keep compatibility with
+        // Android 11+ package visibility restrictions.
+        if (options.hasArgument(APP_SCHEMA) && options.argument(APP_SCHEMA) != null) {
             intent.setPackage((String) options.argument(APP_SCHEMA));
-            return intent;
         }
+
         return intent;
     }
 

example/android/app/build.gradle

@@ -1,37 +1,26 @@
+plugins {
+    id 'com.android.application'
+    id 'org.jetbrains.kotlin.android'
+    id 'dev.flutter.flutter-gradle-plugin'
+}
+
 def localProperties = new Properties()
 def localPropertiesFile = rootProject.file('local.properties')
 if (localPropertiesFile.exists()) {
-    localPropertiesFile.withReader('UTF-8') { reader ->
-        localProperties.load(reader)
-    }
+    localPropertiesFile.withReader('UTF-8') { reader -> localProperties.load(reader) }
 }
 
-def flutterRoot = localProperties.getProperty('flutter.sdk')
-if (flutterRoot == null) {
-    throw GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
-}
-
-def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
-if (flutterVersionCode == null) {
-    flutterVersionCode = '1'
-}
-
-def flutterVersionName = localProperties.getProperty('flutter.versionName')
-if (flutterVersionName == null) {
-    flutterVersionName = '1.0'
-}
-
-apply plugin: 'com.android.application'
-apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
+def flutterVersionCode = localProperties.getProperty('flutter.versionCode') ?: '1'
+def flutterVersionName = localProperties.getProperty('flutter.versionName') ?: '1.0'
 
 android {
-    compileSdk = 35
+    compileSdk = 36
     namespace 'com.dataxad.flutter_mailer_example'
 
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "com.dataxad.flutter_mailer_example"
-        minSdkVersion flutter.minSdkVersion
+    minSdkVersion flutter.minSdkVersion
         targetSdkVersion 35
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
@@ -47,10 +36,6 @@ android {
     }
 }
 
-flutter {
-    source '../..'
-}
-
 dependencies {
     testImplementation 'junit:junit:4.12'
 

example/android/app/src/main/java/com/dataxad/flutter_mailer_example/EmbeddingV1Activity.java

@@ -5,7 +5,7 @@
 // import dev.flutter.plugins.integration_test.IntegrationTestPlugin;
 // import io.flutter.plugins.imagepicker.ImagePickerPlugin;
 // import io.flutter.plugins.pathprovider.PathProviderPlugin;
-import io.flutter.app.FlutterActivity;
+import io.flutter.embedding.android.FlutterActivity;
 
 public class EmbeddingV1Activity extends FlutterActivity {
   // @Override

example/android/build.gradle

@@ -1,19 +1,3 @@
-buildscript {
-    ext {
-        agp_version = '8.7.0'
-        kotlin_version = '2.1.0'
-    }
-    repositories {
-        google()
-        mavenCentral()
-    }
-
-    dependencies {
-        classpath "com.android.tools.build:gradle:$agp_version"
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-    }
-}
-
 allprojects {
     repositories {
         google()

example/android/settings.gradle

@@ -1,11 +1,27 @@
-include ':app'
+pluginManagement {
+	repositories {
+		google()
+		mavenCentral()
+		gradlePluginPortal()
+	}
 
-def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
-def properties = new Properties()
+	def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
+	def properties = new Properties()
 
-assert localPropertiesFile.exists()
-localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
+	assert localPropertiesFile.exists()
+	localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
 
-def flutterSdkPath = properties.getProperty("flutter.sdk")
-assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
-apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"
+	def flutterSdkPath = properties.getProperty("flutter.sdk")
+	assert flutterSdkPath != null : "flutter.sdk not set in local.properties"
+
+	// Make the Flutter Gradle plugin available to this build without applying it imperatively.
+	includeBuild("${flutterSdkPath}/packages/flutter_tools/gradle")
+}
+
+plugins {
+	id "dev.flutter.flutter-plugin-loader" version "1.0.0"
+	id "com.android.application" version "8.7.0" apply false
+	id "org.jetbrains.kotlin.android" version "2.1.0" apply false
+}
+
+include ":app"

pubspec.yaml

@@ -1,6 +1,6 @@
 name: flutter_mailer
 description: Share an email to device Email - Client supports multiple Attachments
-version: 3.0.1
+version: 3.0.2
 homepage:  https://github.com/taljacobson/flutter_mailer
 
 dependencies: