[camera_android_camerax] Add explicit concurrent-futures dependency

packages/camera/camera_android_camerax/CHANGELOG.md

@@ -1,3 +1,10 @@
+## 0.7.4+5
+
+* Adds explicit `androidx.concurrent:concurrent-futures:1.2.0` dependency to fix
+  `compileDebugJavaWithJavac` failing with "class file for
+  androidx.concurrent.futures.CallbackToFutureAdapter not found" when
+  `camera-core`'s jspecify type annotations are resolved during compilation.
+
 ## 0.7.4+4
 
 * Fix `NullPointerException` when disposing camera during active video recording.

packages/camera/camera_android_camerax/android/build.gradle.kts

@@ -82,6 +82,9 @@ dependencies {
     implementation("androidx.camera:camera-lifecycle:${cameraxVersion}")
     implementation("androidx.camera:camera-video:${cameraxVersion}")
     implementation("com.google.guava:guava:33.5.0-android")
+    // camera-core's compiled classes reference CallbackToFutureAdapter type annotations;
+    // without this explicit dependency, javac fails to resolve them during compilation.
+    implementation("androidx.concurrent:concurrent-futures:1.2.0")
     testImplementation("junit:junit:4.13.2")
     testImplementation("org.mockito:mockito-core:5.23.0")
     testImplementation("org.mockito:mockito-inline:5.2.0")

packages/camera/camera_android_camerax/android/src/test/java/io/flutter/plugins/camerax/ConcurrentFuturesDependencyTest.java

@@ -0,0 +1,32 @@
+// Copyright 2013 The Flutter Authors
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package io.flutter.plugins.camerax;
+
+import static org.junit.Assert.assertNotNull;
+
+import androidx.concurrent.futures.CallbackToFutureAdapter;
+import org.junit.Test;
+
+/**
+ * Regression test for https://github.com/flutter/flutter/issues/190505.
+ *
+ * <p>{@code camera-core}'s compiled classes carry jspecify {@code @NonNull} type annotations on
+ * members that reference {@link CallbackToFutureAdapter}. javac needs that class on the compile
+ * classpath to process those annotations, even though this plugin never calls the annotated
+ * members directly. Without an explicit {@code androidx.concurrent:concurrent-futures} dependency,
+ * resolution of that class can silently depend on transitive dependency behavior and fail with
+ * "class file for androidx.concurrent.futures.CallbackToFutureAdapter not found" during {@code
+ * compileDebugJavaWithJavac}.
+ *
+ * <p>The static reference to {@link CallbackToFutureAdapter} below means that if the explicit
+ * dependency in {@code android/build.gradle.kts} is ever removed, this test target fails to
+ * compile instead of the break only surfacing as a build error for consumers.
+ */
+public class ConcurrentFuturesDependencyTest {
+  @Test
+  public void callbackToFutureAdapter_isOnClasspath() {
+    assertNotNull(CallbackToFutureAdapter.class);
+  }
+}

packages/camera/camera_android_camerax/pubspec.yaml

@@ -2,7 +2,7 @@ name: camera_android_camerax
 description: Android implementation of the camera plugin using the CameraX library.
 repository: https://github.com/flutter/packages/tree/main/packages/camera/camera_android_camerax
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+camera%22
-version: 0.7.4+4
+version: 0.7.4+5
 
 environment:
   sdk: ^3.12.0