J2ME开发大全一书的全部源代码-all code of j2me: the complete reference

Android 手机上用的屏幕保护程序，Java源码。具备锁屏、屏蔽home、屏蔽返回、屏蔽挂机键等功能。-Android phones with a screen saver, Java source code. With the lock screen, shielding home, shielded back, shielding hook key functions.

这个hook框架substrate，主要运用于android系统，它既可以用于java语言的hook，也可以用于c-c++语言的hook。(This hook framework, substrate, is mainly used in the Android system, which can be used not only in the hook of the Java language, but also in the hook of the c-c++ language.)