dart-lang · brianquinlan · Jul 18, 2025 · Jul 18, 2025 · Jul 18, 2025 · Jul 18, 2025
diff --git a/pkgs/cronet_http/CHANGELOG.md b/pkgs/cronet_http/CHANGELOG.md
@@ -3,6 +3,7 @@
 * Add a new `CronetStreamedResponse` class that provides additional information
   about the HTTP response.
 * Fix a Flutter warning by upgrading to Kotlin 1.18.10.
+* Upgrade `package:jni` and `package:jnigen` to 0.14.2.
 
 ## 1.3.4
 

diff --git a/pkgs/cronet_http/android/build.gradle b/pkgs/cronet_http/android/build.gradle
@@ -31,12 +31,12 @@ android {
     compileSdkVersion 31
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+        sourceCompatibility JavaVersion.VERSION_11
+        targetCompatibility JavaVersion.VERSION_11
     }
 
     kotlinOptions {
-        jvmTarget = '1.8'
+        jvmTarget = '11'
     }
 
     sourceSets {

diff --git a/...et_http/android/src/main/kotlin/io/flutter/plugins/cronet_http/UrlRequestCallbackProxy.kt b/...et_http/android/src/main/kotlin/io/flutter/plugins/cronet_http/UrlRequestCallbackProxy.kt
@@ -19,58 +19,69 @@ import org.chromium.net.UrlRequest
 import org.chromium.net.UrlResponseInfo
 import java.nio.ByteBuffer
 
+// Due to a bug (https://github.com/dart-lang/native/issues/2421) where JNIgen
+// does not synchronize the nullabilities across the class hierarchy and the
+// fact that UrlRequest.Callback is a Java class with no nullability
+// annotations, generating both `UrlRequestCallbackProxy` and
+// `UrlRequest.Callback` together with different nullabilities causes the
+// super method to have a looser type for parameters which is a Dart compilation
+// error. 
+// That is why all of the parameters of this class are defined as nullable to
+// match `UrlRequest.Callback` while in reality only `onFailed`'s `info`
+// parameter is nullable as specified in the cronet source code:
+// https://source.chromium.org/chromium/chromium/src/+/main:components/cronet/android/api/src/org/chromium/net/UrlRequest.java;l=232
 
 class UrlRequestCallbackProxy(val callback: UrlRequestCallbackInterface) : UrlRequest.Callback() {
     public interface UrlRequestCallbackInterface {
         fun onRedirectReceived(
-            request: UrlRequest,
-            info: UrlResponseInfo,
-            newLocationUrl: String
+            request: UrlRequest?,
+            info: UrlResponseInfo?,
+            newLocationUrl: String?
         )
 
-        fun onResponseStarted(request: UrlRequest?, info: UrlResponseInfo)
+        fun onResponseStarted(request: UrlRequest?, info: UrlResponseInfo?)
         fun onReadCompleted(
-            request: UrlRequest,
-            info: UrlResponseInfo,
-            byteBuffer: ByteBuffer
+            request: UrlRequest?,
+            info: UrlResponseInfo?,
+            byteBuffer: ByteBuffer?
         )
 
-        fun onSucceeded(request: UrlRequest, info: UrlResponseInfo?)
+        fun onSucceeded(request: UrlRequest?, info: UrlResponseInfo?)
         fun onFailed(
-            request: UrlRequest,
+            request: UrlRequest?,
             info: UrlResponseInfo?,
-            error: CronetException
+            error: CronetException?
         )
     }
 
     override fun onRedirectReceived(
-        request: UrlRequest,
-        info: UrlResponseInfo,
-        newLocationUrl: String
+        request: UrlRequest?,
+        info: UrlResponseInfo?,
+        newLocationUrl: String?
     ) {
         callback.onRedirectReceived(request, info, newLocationUrl);
     }
 
-    override fun onResponseStarted(request: UrlRequest?, info: UrlResponseInfo) {
+    override fun onResponseStarted(request: UrlRequest?, info: UrlResponseInfo?) {
         callback.onResponseStarted(request, info);
     }
 
     override fun onReadCompleted(
-        request: UrlRequest,
-        info: UrlResponseInfo,
-        byteBuffer: ByteBuffer
+        request: UrlRequest?,
+        info: UrlResponseInfo?,
+        byteBuffer: ByteBuffer?
     ) {
         callback.onReadCompleted(request, info, byteBuffer);
     }
 
-    override fun onSucceeded(request: UrlRequest, info: UrlResponseInfo?) {
+    override fun onSucceeded(request: UrlRequest?, info: UrlResponseInfo?) {
         callback.onSucceeded(request, info);
     }
 
     override fun onFailed(
-        request: UrlRequest,
+        request: UrlRequest?,
         info: UrlResponseInfo?,
-        error: CronetException
+        error: CronetException?
     ) {
         callback.onFailed(request, info, error);
     }

diff --git a/pkgs/cronet_http/example/android/app/build.gradle b/pkgs/cronet_http/example/android/app/build.gradle
@@ -28,12 +28,12 @@ android {
     namespace 'io.flutter.cronet_http_example'
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_1_8
-        targetCompatibility JavaVersion.VERSION_1_8
+        sourceCompatibility JavaVersion.VERSION_11
+        targetCompatibility JavaVersion.VERSION_11
     }
 
     kotlinOptions {
-        jvmTarget = '1.8'
+        jvmTarget = '11'
     }
 
     sourceSets {
@@ -66,9 +66,6 @@ flutter {
 }
 
 dependencies {
-    // TODO(#1112): org.jetbrains.kotlin:kotlin-bom artifact purpose is to align kotlin stdlib and related code versions.
-    // This should be removed when https://github.com/flutter/flutter/issues/125062 is fixed.
-    implementation(platform("org.jetbrains.kotlin:kotlin-bom:1.8.0"))
     // ""com.google.android.gms:play-services-cronet" is only present so that
     // `jnigen` will work. Applications should not include this line.
     // The version should be synced with `pkgs/cronet_http/android/build.gradle`.

diff --git a/pkgs/cronet_http/example/android/build.gradle b/pkgs/cronet_http/example/android/build.gradle
@@ -1,3 +1,11 @@
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
 rootProject.buildDir = '../build'
 subprojects {
     project.buildDir = "${rootProject.buildDir}/${project.name}"

diff --git a/pkgs/cronet_http/lib/src/cronet_client.dart b/pkgs/cronet_http/lib/src/cronet_client.dart
@@ -39,8 +39,9 @@ class CronetStreamedResponse extends _StreamedResponseWithUrl {
   ///
   /// It will be the empty string or `'unknown'` if no protocol was negotiated,
   /// the protocol is not known, or when using plain HTTP or HTTPS.
-  String get negotiatedProtocol =>
-      _responseInfo.getNegotiatedProtocol().toDartString(releaseOriginal: true);
+  String get negotiatedProtocol => _responseInfo
+      .getNegotiatedProtocol()!
+      .toDartString(releaseOriginal: true);
 
   /// The minimum count of bytes received from the network to process this
   /// request.
@@ -124,7 +125,7 @@ class CronetEngine {
       bool? enableQuic,
       String? storagePath,
       String? userAgent}) {
-    final builder = jb.CronetEngine_Builder(
+    final builder = jb.CronetEngine$Builder(
         JObject.fromReference(Jni.getCachedApplicationContext()));
 
     try {
@@ -159,7 +160,7 @@ class CronetEngine {
         builder.setUserAgent(userAgent.toJString());
       }
 
-      return CronetEngine._(builder.build());
+      return CronetEngine._(builder.build()!);
     } on JniException catch (e) {
       // TODO: Decode this exception in a better way when
       // https://github.com/dart-lang/jnigen/issues/239 is fixed.
@@ -182,12 +183,12 @@ class CronetEngine {
 }
 
 Map<String, String> _cronetToClientHeaders(
-        JMap<JString, JList<JString>> cronetHeaders) =>
+        JMap<JString?, JList<JString?>?> cronetHeaders) =>
     cronetHeaders.map((key, value) => MapEntry(
-        key.toDartString(releaseOriginal: true).toLowerCase(),
-        value.join(',')));
+        key!.toDartString(releaseOriginal: true).toLowerCase(),
+        value!.join(',')));
 
-jb.UrlRequestCallbackProxy_UrlRequestCallbackInterface _urlRequestCallbacks(
+jb.UrlRequestCallbackProxy$UrlRequestCallbackInterface _urlRequestCallbacks(
     BaseRequest request,
     Completer<CronetStreamedResponse> responseCompleter,
     HttpClientRequestProfile? profile) {
@@ -198,21 +199,24 @@ jb.UrlRequestCallbackProxy_UrlRequestCallbackInterface _urlRequestCallbacks(
 
   // The order of callbacks generated by Cronet is documented here:
   // https://developer.android.com/guide/topics/connectivity/cronet/lifecycle
-  return jb.UrlRequestCallbackProxy_UrlRequestCallbackInterface.implement(
-      jb.$UrlRequestCallbackProxy_UrlRequestCallbackInterface(
+  return jb.UrlRequestCallbackProxy$UrlRequestCallbackInterface.implement(
+      // All of the variables in the interface are non-nullable with the
+      // exception of onFailed's UrlResponseInfo as specified in:
+      // https://source.chromium.org/chromium/chromium/src/+/main:components/cronet/android/api/src/org/chromium/net/UrlRequest.java;l=232
+      jb.$UrlRequestCallbackProxy$UrlRequestCallbackInterface(
     onResponseStarted: (urlRequest, responseInfo) {
       responseStream = StreamController(onCancel: () {
         // The user did `response.stream.cancel()`. We can just pretend that
         // the response completed normally.
         if (done) return;
         done = true;
-        urlRequest.cancel();
+        urlRequest!.cancel();
         responseStream!.sink.close();
         jByteBuffer?.release();
         profile?.responseData.close();
       });
       final responseHeaders =
-          _cronetToClientHeaders(responseInfo.getAllHeaders());
+          _cronetToClientHeaders(responseInfo!.getAllHeaders()!);
       int? contentLength;
 
       switch (responseHeaders['content-length']) {
@@ -222,7 +226,7 @@ jb.UrlRequestCallbackProxy_UrlRequestCallbackInterface _urlRequestCallbacks(
             'Invalid content-length header [$contentLengthHeader].',
             request.url,
           ));
-          urlRequest.cancel();
+          urlRequest?.cancel();
           return;
         case final contentLengthHeader?:
           contentLength = int.parse(contentLengthHeader);
@@ -232,10 +236,10 @@ jb.UrlRequestCallbackProxy_UrlRequestCallbackInterface _urlRequestCallbacks(
         responseInfo.getHttpStatusCode(),
         responseInfo: responseInfo,
         url: Uri.parse(
-            responseInfo.getUrl().toDartString(releaseOriginal: true)),
+            responseInfo.getUrl()!.toDartString(releaseOriginal: true)),
         contentLength: contentLength,
         reasonPhrase: responseInfo
-            .getHttpStatusText()
+            .getHttpStatusText()!
             .toDartString(releaseOriginal: true),
         request: request,
         isRedirect: false,
@@ -247,39 +251,40 @@ jb.UrlRequestCallbackProxy_UrlRequestCallbackInterface _urlRequestCallbacks(
         ?..contentLength = contentLength
         ..headersCommaValues = responseHeaders
         ..isRedirect = false
-        ..reasonPhrase =
-            responseInfo.getHttpStatusText().toDartString(releaseOriginal: true)
+        ..reasonPhrase = responseInfo
+            .getHttpStatusText()!
+            .toDartString(releaseOriginal: true)
         ..startTime = DateTime.now()
         ..statusCode = responseInfo.getHttpStatusCode();
       jByteBuffer = JByteBuffer.allocateDirect(_bufferSize);
-      urlRequest.read(jByteBuffer!);
+      urlRequest?.read(jByteBuffer!);
     },
     onRedirectReceived: (urlRequest, responseInfo, newLocationUrl) {
       if (done) return;
       final responseHeaders =
-          _cronetToClientHeaders(responseInfo.getAllHeaders());
+          _cronetToClientHeaders(responseInfo!.getAllHeaders()!);
 
       if (!request.followRedirects) {
-        urlRequest.cancel();
+        urlRequest!.cancel();
         responseCompleter.complete(CronetStreamedResponse._(
             const Stream.empty(), // Cronet provides no body for redirects.
             responseInfo.getHttpStatusCode(),
             responseInfo: responseInfo,
             url: Uri.parse(
-                responseInfo.getUrl().toDartString(releaseOriginal: true)),
+                responseInfo.getUrl()!.toDartString(releaseOriginal: true)),
             contentLength: 0,
             reasonPhrase: responseInfo
-                .getHttpStatusText()
+                .getHttpStatusText()!
                 .toDartString(releaseOriginal: true),
             request: request,
             isRedirect: true,
-            headers: _cronetToClientHeaders(responseInfo.getAllHeaders())));
+            headers: _cronetToClientHeaders(responseInfo.getAllHeaders()!)));
 
         profile?.responseData
           ?..headersCommaValues = responseHeaders
           ..isRedirect = true
           ..reasonPhrase = responseInfo
-              .getHttpStatusText()
+              .getHttpStatusText()!
               .toDartString(releaseOriginal: true)
           ..startTime = DateTime.now()
           ..statusCode = responseInfo.getHttpStatusCode();
@@ -294,23 +299,23 @@ jb.UrlRequestCallbackProxy_UrlRequestCallbackInterface _urlRequestCallbacks(
             // does not seem to have a way to get the method so we'd have to
             // calculate it according to the rules in RFC-7231.
             method: 'GET',
-            location: newLocationUrl.toDartString(releaseOriginal: true)));
-        urlRequest.followRedirect();
+            location: newLocationUrl!.toDartString(releaseOriginal: true)));
+        urlRequest!.followRedirect();
       } else {
-        urlRequest.cancel();
+        urlRequest!.cancel();
         responseCompleter.completeError(
             ClientException('Redirect limit exceeded', request.url));
       }
     },
     onReadCompleted: (urlRequest, responseInfo, byteBuffer) {
       if (done) return;
-      byteBuffer.flip();
+      byteBuffer!.flip();
       final data = jByteBuffer!.asUint8List().sublist(0, byteBuffer.remaining);
       responseStream!.add(data);
       profile?.responseData.bodySink.add(data);
 
       byteBuffer.clear();
-      urlRequest.read(byteBuffer);
+      urlRequest!.read(byteBuffer);
     },
     onSucceeded: (urlRequest, responseInfo) {
       if (done) return;
@@ -319,7 +324,7 @@ jb.UrlRequestCallbackProxy_UrlRequestCallbackInterface _urlRequestCallbacks(
       jByteBuffer?.release();
       profile?.responseData.close();
     },
-    onFailed: (urlRequest, responseInfo, cronetException) {
+    onFailed: (urlRequest, responseInfo /* can be null */, cronetException) {
       if (done) return;
       done = true;
       final error = ClientException(
@@ -442,7 +447,8 @@ class CronetClient extends BaseClient {
       jb.UrlRequestCallbackProxy(
           _urlRequestCallbacks(request, responseCompleter, profile)),
       _executor,
-    )..setHttpMethod(request.method.toJString());
+    )!
+      ..setHttpMethod(request.method.toJString());
 
     var headers = request.headers;
     if (body.isNotEmpty &&
@@ -471,7 +477,7 @@ class CronetClient extends BaseClient {
       builder.setUploadDataProvider(
           jb.UploadDataProviders.create$2(data), _executor);
     }
-    builder.build().start();
+    builder.build()!.start();
     return responseCompleter.future;
   }
 }