[camerax] Wrap classes to implement resolution configuration for image capture, image analysis, and preview

packages/camera/camera_android_camerax/CHANGELOG.md

@@ -1,3 +1,9 @@
+## 0.5.0+12
+
+* Wraps classes needed to implement resolution configuration for image capture, image analysis, and preview.
+* Removes usages of deprecated APIs for resolution configuration.
+* Bumps CameraX version to 1.3.0-beta01.
+
 ## 0.5.0+11
 
 * Fixes issue with image data not being emitted after relistening to stream returned by `onStreamedFrameAvailable`.

packages/camera/camera_android_camerax/android/build.gradle

@@ -61,7 +61,7 @@ android {
 
 dependencies {
     // CameraX core library using the camera2 implementation must use same version number.
-    def camerax_version = "1.3.0-alpha05"
+    def camerax_version = "1.3.0-beta01"
     implementation "androidx.camera:camera-core:${camerax_version}"
     implementation "androidx.camera:camera-camera2:${camerax_version}"
     implementation "androidx.camera:camera-lifecycle:${camerax_version}"

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

@@ -0,0 +1,65 @@
+// 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.annotation.VisibleForTesting;
+import androidx.camera.core.resolutionselector.AspectRatioStrategy;
+import io.flutter.plugins.camerax.GeneratedCameraXLibrary.AspectRatioStrategyHostApi;
+
+/**
+ * Host API implementation for {@link AspectRatioStrategy}.
+ *
+ * <p>This class handles instantiating and adding native object instances that are attached to a
+ * Dart instance or handle method calls on the associated native class or an instance of the class.
+ */
+public class AspectRatioStrategyHostApiImpl implements AspectRatioStrategyHostApi {
+  private final InstanceManager instanceManager;
+  private final AspectRatioStrategyProxy proxy;
+
+  /** Proxy for constructors and static method of {@link AspectRatioStrategy}. */
+  @VisibleForTesting
+  public static class AspectRatioStrategyProxy {
+    /** Creates an instance of {@link AspectRatioStrategy}. */
+    @NonNull
+    public AspectRatioStrategy create(
+        @NonNull Long preferredAspectRatio, @NonNull Long fallbackRule) {
+      return new AspectRatioStrategy(preferredAspectRatio.intValue(), fallbackRule.intValue());
+    }
+  }
+
+  /**
+   * Constructs a {@link AspectRatioStrategyHostApiImpl}.
+   *
+   * @param instanceManager maintains instances stored to communicate with attached Dart objects
+   */
+  public AspectRatioStrategyHostApiImpl(@NonNull InstanceManager instanceManager) {
+    this(instanceManager, new AspectRatioStrategyProxy());
+  }
+
+  /**
+   * Constructs a {@link AspectRatioStrategyHostApiImpl}.
+   *
+   * @param instanceManager maintains instances stored to communicate with attached Dart objects
+   * @param proxy proxy for constructors and static method of {@link AspectRatioStrategy}
+   */
+  @VisibleForTesting
+  AspectRatioStrategyHostApiImpl(
+      @NonNull InstanceManager instanceManager, @NonNull AspectRatioStrategyProxy proxy) {
+    this.instanceManager = instanceManager;
+    this.proxy = proxy;
+  }
+
+  /**
+   * Creates a {@link AspectRatioStrategy} instance with the preferred aspect ratio and fallback
+   * rule specified.
+   */
+  @Override
+  public void create(
+      @NonNull Long identifier, @NonNull Long preferredAspectRatio, @NonNull Long fallbackRule) {
+    instanceManager.addDartCreatedInstance(
+        proxy.create(preferredAspectRatio, fallbackRule), identifier);
+  }
+}

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

@@ -97,6 +97,12 @@ public void setUp(
         binaryMessenger, pendingRecordingHostApiImpl);
     videoCaptureHostApiImpl = new VideoCaptureHostApiImpl(binaryMessenger, instanceManager);
     GeneratedCameraXLibrary.VideoCaptureHostApi.setup(binaryMessenger, videoCaptureHostApiImpl);
+    GeneratedCameraXLibrary.ResolutionSelectorHostApi.setup(
+        binaryMessenger, new ResolutionSelectorHostApiImpl(instanceManager));
+    GeneratedCameraXLibrary.ResolutionStrategyHostApi.setup(
+        binaryMessenger, new ResolutionStrategyHostApiImpl(instanceManager));
+    GeneratedCameraXLibrary.AspectRatioStrategyHostApi.setup(
+        binaryMessenger, new AspectRatioStrategyHostApiImpl(instanceManager));
   }
 
   @Override