Merge pull request tiann#2 from yemengsky/patch-1

Update HookHelper.java

Author: weishu

dynamic-proxy-hook/src/main/java/com/weishu/upf/dynamic_proxy_hook/app2/hook/HookHelper.java

@@ -16,6 +16,7 @@ public static void attachContext() throws Exception{
         Class<?> activityThreadClass = Class.forName("android.app.ActivityThread");
         Method currentActivityThreadMethod = activityThreadClass.getDeclaredMethod("currentActivityThread");
         currentActivityThreadMethod.setAccessible(true);
+        //currentActivityThread是一个static函数所以可以直接invoke，不需要带实例参数
         Object currentActivityThread = currentActivityThreadMethod.invoke(null);
 
         // 拿到原始的 mInstrumentation字段