Release javaPart on module invalidate

Author: j-piasecki

packages/react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/react/RNGestureHandlerModule.kt

@@ -149,6 +149,7 @@ class RNGestureHandlerModule(reactContext: ReactApplicationContext?) :
   private external fun initHybrid(): HybridData
   private external fun getBindingsInstallerCxx(): BindingsInstallerHolder
   private external fun decorateUIRuntime(): Boolean
+  private external fun invalidateNative(): Unit
 
   override fun getBindingsInstaller() = getBindingsInstallerCxx()
 
@@ -166,6 +167,7 @@ class RNGestureHandlerModule(reactContext: ReactApplicationContext?) :
         }
       }
     }
+    invalidateNative()
     super.invalidate()
   }
 

packages/react-native-gesture-handler/android/src/main/jni/RNGestureHandlerModule.cpp

@@ -20,7 +20,9 @@ void RNGestureHandlerModule::registerNatives() {
            "getBindingsInstallerCxx",
            RNGestureHandlerModule::getBindingsInstallerCxx),
        makeNativeMethod(
-           "decorateUIRuntime", RNGestureHandlerModule::decorateUIRuntime)});
+           "decorateUIRuntime", RNGestureHandlerModule::decorateUIRuntime),
+       makeNativeMethod(
+           "invalidateNative", RNGestureHandlerModule::invalidateNative)});
 }
 
 jni::local_ref<RNGestureHandlerModule::jhybriddata>
@@ -56,4 +58,11 @@ bool RNGestureHandlerModule::decorateUIRuntime() {
         this->setGestureState(handlerTag, state);
       });
 }
+
+void RNGestureHandlerModule::invalidateNative() {
+  // This is called when the module is being destroyed, so we need to clear
+  // the reference to the java part to avoid memory leaks.
+  javaPart_ = nullptr;
+}
+
 } // namespace gesturehandler

packages/react-native-gesture-handler/android/src/main/jni/RNGestureHandlerModule.h

@@ -29,5 +29,6 @@ class RNGestureHandlerModule : public jni::HybridClass<RNGestureHandlerModule> {
   void setGestureState(const int handlerTag, const int state);
   void decorateRuntime(jsi::Runtime &runtime);
   bool decorateUIRuntime();
+  void invalidateNative();
 };
 } // namespace gesturehandler