[camera_android_camerax] Updates internal API wrapper to use ProxyApis (flutter#8618)

Also Fixes flutter/flutter#164132 by passing a `TestInstanceManager` when needed.

Author: bparrishMines

packages/camera/camera_android_camerax/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.6.15
+
+* Updates internal API wrapper to use ProxyApis.
+
 ## 0.6.14+1
 
 * Updates compileSdk 34 to flutter.compileSdkVersion.

packages/camera/camera_android_camerax/android/build.gradle

@@ -2,13 +2,15 @@ group 'io.flutter.plugins.camerax'
 version '1.0'
 
 buildscript {
+    ext.kotlin_version = '1.9.10'
     repositories {
         google()
         mavenCentral()
     }
 
     dependencies {
         classpath 'com.android.tools.build:gradle:8.5.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
 
@@ -20,6 +22,7 @@ rootProject.allprojects {
 }
 
 apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
 
 android {
     namespace 'io.flutter.plugins.camerax'
@@ -31,6 +34,11 @@ android {
         targetCompatibility JavaVersion.VERSION_11
     }
 
+    kotlinOptions {
+        // This must match the Java version provided in compileOptions.
+        jvmTarget = '11'
+    }
+
     defaultConfig {
         // Many of the CameraX APIs require API 21.
         minSdkVersion 21
@@ -65,7 +73,8 @@ dependencies {
     implementation "androidx.camera:camera-video:${camerax_version}"
     implementation 'com.google.guava:guava:33.4.0-android'
     testImplementation 'junit:junit:4.13.2'
-    testImplementation 'org.mockito:mockito-inline:5.0.0'
+    testImplementation "org.mockito:mockito-core:5.15.2"
+    testImplementation 'org.mockito:mockito-inline:5.1.0'
     testImplementation 'androidx.test:core:1.4.0'
     testImplementation 'org.robolectric:robolectric:4.10.3'
 }

packages/camera/camera_android_camerax/android/src/main/java/io/flutter/plugins/camerax/AnalyzerFlutterApiImpl.java

@@ -0,0 +1,64 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// 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 androidx.annotation.NonNull;
+import androidx.camera.core.ImageAnalysis.Analyzer;
+import java.util.Objects;
+
+/**
+ * ProxyApi implementation for {@link Analyzer}. This class may handle instantiating native object
+ * instances that are attached to a Dart instance or handle method calls on the associated native
+ * class or an instance of that class.
+ */
+class AnalyzerProxyApi extends PigeonApiAnalyzer {
+  AnalyzerProxyApi(@NonNull ProxyApiRegistrar pigeonRegistrar) {
+    super(pigeonRegistrar);
+  }
+
+  @NonNull
+  @Override
+  public ProxyApiRegistrar getPigeonRegistrar() {
+    return (ProxyApiRegistrar) super.getPigeonRegistrar();
+  }
+
+  /** Implementation of {@link Analyzer} that passes arguments of callback methods to Dart. */
+  static class AnalyzerImpl implements Analyzer {
+    final AnalyzerProxyApi api;
+
+    AnalyzerImpl(@NonNull AnalyzerProxyApi api) {
+      this.api = api;
+    }
+
+    @Override
+    public void analyze(@NonNull androidx.camera.core.ImageProxy image) {
+      api.getPigeonRegistrar()
+          .runOnMainThread(
+              new ProxyApiRegistrar.FlutterMethodRunnable() {
+                @Override
+                public void run() {
+                  api.analyze(
+                      AnalyzerImpl.this,
+                      image,
+                      ResultCompat.asCompatCallback(
+                          result -> {
+                            if (result.isFailure()) {
+                              onFailure(
+                                  "Analyzer.analyze",
+                                  Objects.requireNonNull(result.exceptionOrNull()));
+                            }
+                            return null;
+                          }));
+                }
+              });
+    }
+  }
+
+  @NonNull
+  @Override
+  public Analyzer pigeon_defaultConstructor() {
+    return new AnalyzerImpl(this);
+  }
+}