如何使用原生代码更改Titanium中操作栏中的主页/后退按钮图标？

import android.graphics.drawable.Drawable;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;

public class ActionBarUtils {
    public static void changeHomeButtonIcon(AppCompatActivity activity, int iconResId) {
        ActionBar actionBar = activity.getSupportActionBar();
        if (actionBar != null) {
            Drawable icon = activity.getResources().getDrawable(iconResId);
            actionBar.setHomeAsUpIndicator(icon);
        }
    }
}

#import <UIKit/UIKit.h>

@interface NavigationBarUtils : NSObject

+ (void)changeHomeButtonIcon:(UIViewController *)viewController withImage:(UIImage *)image;

@end

@implementation NavigationBarUtils

+ (void)changeHomeButtonIcon:(UIViewController *)viewController withImage:(UIImage *)image {
    UINavigationBar *navigationBar = viewController.navigationController.navigationBar;
    if (navigationBar != nil) {
        UIBarButtonItem *homeButton = viewController.navigationItem.leftBarButtonItem;
        if (homeButton != nil) {
            [homeButton setImage:image];
        }
    }
}

@end

@Kroll.module(name = "ActionBarModule", id = "com.example.actionbarmodule")
public class ActionBarModule extends KrollModule {
    @Kroll.method
    public void changeHomeButtonIcon(int iconResId) {
        AppCompatActivity activity = (AppCompatActivity) TiApplication.getAppCurrentActivity();
        ActionBarUtils.changeHomeButtonIcon(activity, iconResId);
    }
}

#import "TiModule.h"
#import "NavigationBarUtils.h"

@interface ActionBarModule : TiModule

- (void)changeHomeButtonIcon:(id)args;

@end

@implementation ActionBarModule

- (void)changeHomeButtonIcon:(id)args {
    UIViewController *viewController = [self valueForKey:@"hostViewController"];
    UIImage *image = [TiUtils toImage:[args objectAtIndex:0] proxy:self];
    [NavigationBarUtils changeHomeButtonIcon:viewController withImage:image];
}

@end

var actionBarModule = require('com.example.actionbarmodule');
actionBarModule.changeHomeButtonIcon('/path/to/icon.png');