同一Fragment不同Frame加载两个Mapbox地图时单个地图冻结求助

报错信息 #

原报错：Can't update annotation: Symbol{geometry=Point{type=Point, bbox=null, coordinates=[-121.3559284, 38.9228032]}, properties={"symbol-sort-key":null,"icon-size":null,"icon-image":"marker-icon-id","icon-rotate":165.30766,"icon-offset":null,"icon-anchor":null,"text-field":null,"text-font":null,"text-size":null,"text-max-width":null,"text-letter-spacing":null,"text-justify":null,"text-radial-offset":null,"text-anchor":null,"text-rotate":null,"text-transform":null,"text-offset":null,"icon-opacity":null,"icon-color":null,"icon-halo-color":null,"icon-halo-width":null,"icon-halo-blur":null,"text-opacity":null,"text-color":null,"text-halo-color":null,"text-halo-width":null,"text-halo-blur":null,"id":2,"custom_data":null}, isDraggable=false}, the annotation isn't active annotation.
翻译：无法更新标注：Symbol{geometry=Point{type=Point, bbox=null, coordinates=[-121.3559284, 38.9228032]}, properties={"symbol-sort-key":null,"icon-size":null,"icon-image":"marker-icon-id","icon-rotate":165.30766,"icon-offset":null,"icon-anchor":null,"text-field":null,"text-font":null,"text-size":null,"text-max-width":null,"text-letter-spacing":null,"text-justify":null,"text-radial-offset":null,"text-anchor":null,"text-rotate":null,"text-transform":null,"text-offset":null,"icon-opacity":null,"icon-color":null,"icon-halo-color":null,"icon-halo-width":null,"icon-halo-blur":null,"text-opacity":null,"text-color":null,"text-halo-color":null,"text-halo-width":null,"text-halo-blur":null,"id":2,"custom_data":null}, isDraggable=false}，该标注并非活跃标注。

问题场景 #

• 初始状态：全屏MapView显示，右下角有小视频窗口，通过SymbolManager在地图上展示当前经纬度，符号可正常移动。
• 第一次切换：点击视频窗口，切换为全屏视频+小窗口MapView，小地图符号仍能正常移动。
• 第二次切换：点击小MapView切回全屏后，地图移动图标冻结，触发上述报错。

解决方案 #

1. 绑定SymbolManager与MapView生命周期
   切换MapView显示状态时，同步执行SymbolManager的生命周期方法。切回全屏MapView时，重新初始化对应SymbolManager，避免引用失效标注实例：

   if (fullScreenMapView.isShown()) {
       fullScreenSymbolManager = new SymbolManager(fullScreenMapView, fullScreenMapboxMap, style);
       updateCurrentLocationSymbol(fullScreenSymbolManager, currentLatLng);
   }
   

2. 维护独立的Symbol实例
   两个MapView的SymbolManager各自维护独立的Symbol对象，切换时不为当前活跃MapView复用旧Symbol，而是创建新Symbol添加，确保标注处于活跃状态。

3. 更新前检查标注活跃性
   更新标注前，先通过symbolManager.getAnnotations()确认目标Symbol在活跃列表中，存在则更新，不存在则重新添加：

   boolean isActive = false;
   for (Annotation annotation : symbolManager.getAnnotations()) {
       if (annotation.getId() == targetSymbolId) {
           isActive = true;
           break;
       }
   }
   if (isActive) {
       symbolManager.updateSymbol(targetSymbol);
   } else {
       symbolManager.createSymbol(targetSymbol);
   }
   

4. 切换时清理资源
   切换到小窗口MapView时，清理全屏MapView的SymbolManager，移除所有标注；切回全屏时重新初始化，避免残留失效引用。

内容的提问来源于stack exchange，提问作者Kutbi