android - 无法在 multidex apk 中 Xposed Hook 一类 defpackage 包

Question

这是一个多索引 apk。我想在类 defpackage.bky 中挂钩一个方法，如下图所示。

Jadx 截图图片链接

1. 我尝试如下挂钩 Application.class “attach” 方法，但失败：“java.lang.ClassNotFoundException：在路径上找不到类“defpackage.bky”。

       XposedHelpers.findAndHookMethod(Application.class, "attach", Context.class, new XC_MethodHook() {
           @Override
           protected void afterHookedMethod(MethodHookParam param) throws Throwable {
               ClassLoader cl = ((Context)param.args[0]).getClassLoader();
               Class<?> hookclass = null;
   
               try {
                   hookclass = cl.loadClass("defpackage.bky");
               } catch (Exception e) {
                   Log.e("MtwmXposed", "寻找defpackage.bky报错", e);
                   hookclass = null;
               }
               if(hookclass != null) {
                   Log.i("MtwmXposed", "寻找defpackage.bky成功");
                   XposedHelpers.findAndHookMethod(hookclass, "a",
                           JSONObject.class,
                           new XC_MethodHook() {
                               @Override
                               protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
                                   super.beforeHookedMethod(param);
                                   JSONObject shop_info = (JSONObject) param.args[0];
                                   Log.d("MtwmXposed", "From defpackage.bkt.a: " + shop_info.toString(2));
                               }
                           });
               }
   
   
           }
       });
   

2. 我还尝试如下挂钩 ClassLoader.class "getClass" 方法，但也没有找到 defpackage.bky。

      XposedHelpers.findAndHookMethod(ClassLoader.class, "loadClass", String.class, new XC_MethodHook() {
           @Override
           protected void afterHookedMethod(MethodHookParam param) throws Throwable {
               super.afterHookedMethod(param);
               if (param.hasThrowable()) return;
               Class<?> cls = (Class<?>) param.getResult();
               String name = cls.getName();
               Log.d("MtwmXposed", "class name =  " + name);
               if (name.equals("defpackage.bky")) {
                   Log.i("MtwmXposed", "寻找defpackage.bky成功");
                   XposedHelpers.findAndHookMethod(cls, "a",
                           JSONObject.class,
                           new XC_MethodHook() {
                               @Override
                               protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
                                   super.beforeHookedMethod(param);
                                   JSONObject shop_info = (JSONObject) param.args[0];
                                   Log.d("MtwmXposed", "From defpackage.bkt.a: " + shop_info.toString(2));
                               }
                           });
               }
   
           }
       });