Xposed如何实现类中函数的调用

0x01前言

之前学习了Xposed如何实现不重新打包APP的条件下，实现函数的Hook，在使用过程中，除了方法的hook，比如我要实现某些函数额调用，不同类中的函数和Native方法的调用。

0x02 测试环境

1.待测试的APP，这里写了一个测试APP，Mainactivity实现界面，定义两个函数：

public String test1()
Public String test2(String str)

2.新建一个Class为test，并定义两个函数 ，和mainactivity一样，test1()和test2(String str),

3.新建一个testNdk的class，实现native方法，并定义两个函数，

public native String teststr();
public native String mytest(String str);

一个带参数和一个没有参数。

0x03 Xposed 实现方法的调用

这里我们hook mainactivity的btntest方法，

final Class <?> test = XposedHelpers.findClass("com.debug.xposed.xposedtest.test", lpparam.classLoader);
        final Class <?> testndk = XposedHelpers.findClass("com.debug.xposed.xposedtest.testndk", lpparam.classLoader);
        findAndHookMethod("com.debug.xposed.xposedtest.MainActivity", lpparam.classLoader, "testbtn", View.class, new XC_MethodHook() {

            @Override
            protected void beforeHookedMethod(MethodHookParam param) throws Throwable {
                XposedBridge.log("Hook之前");
                //getSign
            }

            @Override
            //函数执行后
            protected void afterHookedMethod(MethodHookParam param) throws Throwable {

                XposedBridge.log("Hook之后");
                try {
                    String str1 = (String) XposedHelpers.callMethod(param.thisObject, "test1");
                    Log.i("debug","mainactivity test1 return "+str1);
                    String str2 = (String) XposedHelpers.callMethod(param.thisObject, "test2","xposed input main test2");
                    Log.i("debug","mainactivity test2 return "+str2);

                    Object testObject = test.newInstance();
                    String str3 = (String) XposedHelpers.callMethod(testObject,"test1");
                    Log.i("debug","test test1 return= "+str3);
                    String str4 = (String) XposedHelpers.callMethod(testObject, "test2", "hello ", "txmg");
                    Log.i("debug","test test2 return= "+str4);

                    Object testndkobject = testndk.newInstance();
                    Method myteststr =  XposedHelpers.findMethodBestMatch(testndkobject.getClass(), "teststr");
                    String str5 = (String) myteststr.invoke(testndkobject);
                    Log.i("debug","ndk teststr return= "+str5);

                    Method mytest =  XposedHelpers.findMethodBestMatch(testndkobject.getClass(), "mytest"," gggg");
                    String str6 = (String) mytest.invoke(testndkobject,"mytest input test ");
                    Log.i("debug","ndk mytest return= "+str6);
                }catch (Exception e)
                {
                    e.printStackTrace();
                }

Log输出：

原文地址： https://www.ijiza.cn/2016/02/14/xposed%E5%A6%82%E4%BD%95%E5%AE%9E%E7%8E%B0%E7%B1%BB%E4%B8%AD%E5%87%BD%E6%95%B0%E7%9A%84%E8%B0%83%E7%94%A8/