Question

我目前在我的Xposed模块中有这个代码：

public class Test implements IXposedHookLoadPackage, IXposedHookZygoteInit {

@Override
public void initZygote(StartupParam startupParam) throws Throwable {
    XposedBridge.log("ZYGOTE INIT");
}

@Override
public void handleLoadPackage(final XC_LoadPackage.LoadPackageParam lpparam) throws Throwable {

    if(lpparam.packageName.equals("com.somerandomapp")) {

        XposedHelpers.findAndHookMethod(Application.class, "attach", Context.class, new XC_MethodHook() {
            @Override
            protected void afterHookedMethod(MethodHookParam param) throws Throwable {

                XposedHelpers.findAndHookMethod("java.lang.Class", lpparam.classLoader,
                        "forName", String.class, boolean.class, ClassLoader.class, new XC_MethodHook() {
                    @Override
                    protected void afterHookedMethod(MethodHookParam param1) throws Throwable {

                        if(((String)param1.args[0]).equals("com.alibaba.wireless.security.mainplugin.SecurityGuardMainPlugin")) {

                            Class clazz = XposedHelpers.findClass("SecurityGuardMainPlugin", (ClassLoader)param1.args[2]);
                            XposedHelpers.findAndHookMethod("com.alibaba.wireless.security.a.l.a", (ClassLoader)param1.args[2], "a", clazz, new XC_MethodHook() {
                                @Override
                                protected void afterHookedMethod(MethodHookParam param) throws Throwable {

                                    XposedHelpers.findAndHookMethod("com.alibaba.wireless.security.a.l.a", lpparam.classLoader, "getSecurityToken", new XC_MethodHook() {
                                        @Override
                                        protected void afterHookedMethod(MethodHookParam param) throws Throwable {
                                            XposedBridge.log("Token: " + param.getResult());
                                        }
                                    });

                                }
                            });

                        }

                    }
                });

            }
        });

    }
}
}

我试图在运行时由app动态加载com.alibaba.wireless.security.a.l.a#a之后挂钩方法SecurityGuardMainPlugin。然而，我得到ClassNotFoundException。这很奇怪，因为正如您在代码中看到的那样，在执行Class#forName方法之后，我会检查是否已加载SecurityGuardMainPlugin并且它似乎已经加载。

我在最后两次lpparam.classloader电话中尝试使用findAndHookMethod但没有运气。

任何帮助将不胜感激！

Answer 1

由于您正在拦截Class.forName并假设它确实在拦截某些内容，因此您无需找到该类，您已经在param1.getResult()中找到了该类。只需直接使用XposedBridge.hookMethod(param1.getResult(), yourHook)即可。

另请注意，从钩子中挂钩方法通常是一种不好的做法。在注册新挂钩之前，请确保成员尚未挂钩。

Xposed模块，ClassNotFoundException动态加载类

1 个答案: