随笔分类 -  android

摘要：一、Android uevent架构 Android很多事件都是通过uevent跟kernel来异步通信的。其中类UEventObserver是核心。 UEventObserver接收kernel的uevent信息的抽象类。 1、server层代码1)battery server:frameworks/frameworks/base/services/java/com/android/server/SystemServer.javaframeworks/frameworks/base/services/java/com/android/server/BatteryService.java 2、 阅读全文

摘要：property_get(variant_keys[i], prop, NULL) 会按如下顺序去获取如下变量所对应的值，然后返回给prop："ro.hardware", /* This goes first so that it can pick up a differentfile on the emulator. */"ro.product.board","ro.board.platform","ro.arch"它们对应的变量为："ro.product.board=$TARGET_BOOTLOADE 阅读全文

摘要：Every property has a name and value. Both name and value are text strings. Property is heavily used in Android to record system setting or exchange information between processes. The property is globally visible in the whole system. Every process can get/set a property.On system initialization, Andr 阅读全文