一个比较有趣的项目源码，可以给其他项目加锁，程序锁的原理是一个“看门狗”的服务定时监视顶层activity，如果activity对应的包名是之前上锁的应用程序的，则弹出一个页面要求输入解锁密码，此页面不运行用户按“BACK”键返回，否则便能不输入密码直接进入应用程序了。如果密码输入正确则进入应用程序.-A more interesting project source code, can the project to other lock, lock program principle is a

This example provides a short descr iption of how to use the ADC peripheral with Analog watchdog feature. Three leds are used to indicate if the converted value exceeds the Analog watchdog thresholds or not. In the STM8L1528-EVAL board