android hook使用示例

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在 activity 中

 @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        btn1 = ((Button) findViewById(R.id.btn1));        //hook 钩，反射和代理的应用        btn1.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                Log.i("qqq==", "33333333333333");            }        });        //hookView(btn1);        hookView1(btn1);    }

//反射+静态代理    private void hookView(View v) {        try {            //获取代理点(代理点是一个对象，优先考虑静态变量和单例)            Class<?> c = Class.forName("android.view.View");            Method method = c.getDeclaredMethod("getListenerInfo");            method.setAccessible(true);            Object obj = method.invoke(v);            //对 代理点的类，进行反射            Class<?> cInfo = Class.forName("android.view.View$ListenerInfo");            Field methodClick = cInfo.getDeclaredField("mOnClickListener");            methodClick.setAccessible(true);            View.OnClickListener clickListener = (View.OnClickListener) methodClick.get(obj);            //修改 代理点的 属性            //methodClick.set(obj, new MyClickListener());            methodClick.set(obj, new MyClickListener(clickListener));        } catch (ClassNotFoundException e) {            e.printStackTrace();        } catch (NoSuchMethodException e) {            e.printStackTrace();        } catch (InvocationTargetException e) {            e.printStackTrace();        } catch (IllegalAccessException e) {            e.printStackTrace();        } catch (NoSuchFieldException e) {            e.printStackTrace();        }    }    private class MyClickListener implements View.OnClickListener {        private View.OnClickListener click;        public MyClickListener() {        }        public MyClickListener(View.OnClickListener click) {            //被 替换掉 的 View.OnClickListener对象            this.click = click;        }        @Override        public void onClick(View v) {            Log.i("qqq==", "2222222222");            if (click != null) click.onClick(v);        }    }

//另一种方式, //反射+动态代理    private void hookView1(View v) {        try {            Class<?> c = Class.forName("android.view.View");            Method method = c.getDeclaredMethod("getListenerInfo");            method.setAccessible(true);            //ListenerInfo 的对象            Object obj = method.invoke(v);            //使用 动态代理模式的方法            Object newProxyInstance = Proxy.newProxyInstance(                    View.OnClickListener.class.getClassLoader(),                    new Class[]{View.OnClickListener.class},                    new InvocationHandler() {                        @Override                        public Object invoke(Object proxy, Method method,                                             Object[] args) throws Throwable {                            Log.i("qqq--", "InvocationHandler调用了");                            return null;                        }                    }            );            //修改 代理点的 属性            Class<?> cListenerInfo = Class.forName("android.view.View$ListenerInfo");            Field field = cListenerInfo.getDeclaredField("mOnClickListener");            field.setAccessible(true);            field.set(obj, newProxyInstance);        } catch (ClassNotFoundException e) {            e.printStackTrace();        } catch (NoSuchMethodException e) {            e.printStackTrace();        } catch (InvocationTargetException e) {            e.printStackTrace();        } catch (IllegalAccessException e) {            e.printStackTrace();        } catch (NoSuchFieldException e) {            e.printStackTrace();        }    }

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