Fix memory leak issues in PAGViewController and PAGImageViewControlle…

…r on ohos. (#2667)

ohos/libpag/src/main/ets/PAGImageView.ets

@@ -23,6 +23,7 @@ import { PAGScaleMode } from './PAGScaleMode';
 import { PAGFile } from './PAGFile';
 import { PAGAnimatorState } from './private/PAGAnimatorState';
 import { PAGUtils } from './private/PAGUtils';
+import { PAGViewCallbackHandler } from './private/PAGViewCallbackHandler'
 
 export interface PAGImageViewListener {
   /**
@@ -274,8 +275,9 @@ export class PAGImageViewController {
   }
 
   constructor() {
-    this.jImageView.setStateChangeCallback(this.onAnimatorStateChange);
-    this.jImageView.setProgressUpdateCallback(this.onAnimatorProgressUpdate);
+    let handler = new PAGViewCallbackHandler(this);
+    this.jImageView.setStateChangeCallback(handler.onStateChange);
+    this.jImageView.setProgressUpdateCallback(handler.onProgressUpdate);
   }
 
   private onAnimationStart() {
@@ -338,7 +340,7 @@ export class PAGImageViewController {
   private listeners: Array<WeakRef<PAGImageViewListener>> = [];
   private view: WeakRef<PAGImageView> | null = null;
   private jImageView: JPAGImageView = new JPAGImageView();
-  private onAnimatorStateChange = (state: number): void => {
+  readonly onAnimatorStateChange = (state: number): void => {
     switch (state) {
       case PAGAnimatorState.Start:
         return this.onAnimationStart();
@@ -350,7 +352,7 @@ export class PAGImageViewController {
         return this.onAnimationRepeat();
     }
   }
-  private onAnimatorProgressUpdate = (): void => {
+  readonly onAnimatorProgressUpdate = (): void => {
     for (const weakListener of this.listeners) {
       const listener = weakListener.deref();
       if (listener && listener.onAnimationUpdate) {

ohos/libpag/src/main/ets/PAGView.ets

@@ -26,6 +26,7 @@ import { Matrix4 } from '@ohos.arkui.node';
 import { PAGAnimatorState } from './private/PAGAnimatorState';
 import { PAGFile } from './PAGFile';
 import { common2D } from '@kit.ArkGraphics2D';
+import { PAGViewCallbackHandler } from './private/PAGViewCallbackHandler';
 
 export interface PAGViewListener {
   /**
@@ -392,8 +393,9 @@ export class PAGViewController {
   }
 
   constructor() {
-    this.jView.setStateChangeCallback(this.onAnimatorStateChange);
-    this.jView.setProgressUpdateCallback(this.onAnimatorProgressUpdate);
+    let handler = new PAGViewCallbackHandler(this);
+    this.jView.setStateChangeCallback(handler.onStateChange);
+    this.jView.setProgressUpdateCallback(handler.onProgressUpdate);
   }
 
   private onAnimationStart() {
@@ -432,7 +434,7 @@ export class PAGViewController {
     }
   }
 
-  private onAnimatorStateChange = (state: number): void => {
+  readonly onAnimatorStateChange = (state: number): void => {
     switch (state) {
       case PAGAnimatorState.Start:
         return this.onAnimationStart();
@@ -444,7 +446,7 @@ export class PAGViewController {
         return this.onAnimationRepeat();
     }
   }
-  private onAnimatorProgressUpdate = (): void => {
+  readonly onAnimatorProgressUpdate = (): void => {
     for (const weakListener of this.listeners) {
       const listener = weakListener.deref();
       if (listener && listener.onAnimationUpdate) {

ohos/libpag/src/main/ets/private/PAGViewCallbackHandler.ets

@@ -0,0 +1,41 @@
+/////////////////////////////////////////////////////////////////////////////////////////////////
+//
+//  Tencent is pleased to support the open source community by making libpag available.
+//
+//  Copyright (C) 2025 THL A29 Limited, a Tencent company. All rights reserved.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
+//  except in compliance with the License. You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+//  unless required by applicable law or agreed to in writing, software distributed under the
+//  license is distributed on an "as is" basis, without warranties or conditions of any kind,
+//  either express or implied. see the license for the specific language governing permissions
+//  and limitations under the license.
+//
+/////////////////////////////////////////////////////////////////////////////////////////////////
+
+import { PAGImageViewController } from '../PAGImageView'
+import { PAGViewController } from '../PAGView'
+
+export class PAGViewCallbackHandler {
+  constructor(viewController: PAGViewController | PAGImageViewController) {
+    this.weakViewController = new WeakRef(viewController);
+  }
+
+  onProgressUpdate = () => {
+    let viewController = this.weakViewController.deref();
+    if (viewController) {
+      viewController.onAnimatorProgressUpdate();
+    }
+  }
+
+  onStateChange = (state: number) => {
+    let viewController = this.weakViewController.deref();
+    if (viewController) {
+      viewController.onAnimatorStateChange(state);
+    }
+  }
+  private weakViewController: WeakRef<PAGViewController | PAGImageViewController>;
+}