Access Activity from ViewManager in React Native - react-native

Question

How are you? I have a some issues in my project.
Here is my code.
public class ViewManager extends ViewGroupManager<FrameLayout> {
public static final String REACT_CLASS = "RNNativeFlip";
public final int COMMAND_CREATE = 1;
private ReactApplicationContext context;
public ViewManager(ReactApplicationContext context) {
this.context = context;
}
#NonNull
#Override
public String getName() {
return REACT_CLASS;
}
#Override
protected FrameLayout createViewInstance(ThemedReactContext reactContext) {
return new FrameLayout(reactContext);
}
#Nullable
#Override
public Map<String, Integer> getCommandsMap() {
return MapBuilder.of("create", COMMAND_CREATE);
}
#Override
public void receiveCommand(
#NonNull FrameLayout root,
int commandId,
#Nullable ReadableArray args
) {
super.receiveCommand(root, commandId, args);
int reactNativeViewId = args.getInt(0);
int commandIdInt = commandId;
switch (commandIdInt) {
case COMMAND_CREATE:
createFragment(root, reactNativeViewId);
break;
default: {}
}
}
public void createFragment(FrameLayout root, int reactNativeViewId) {
final MainFragment myFragment = new MainFragment();
FragmentActivity activity;
activity = (FragmentActivity) this.context.getCurrentActivity();
activity.getSupportFragmentManager()
.beginTransaction()
.replace(reactNativeViewId, myFragment, String.valueOf(reactNativeViewId))
.commit();
}
}
No longer possible to access Activity from getCurrentActivity()
I know one method to use ReactContextBaseJavaModule but I don't know how to use this in ViewManger.
Please help me. Thank you