8. Android系统架构HAL层
HAL is the hardware abstraction layer which is defined by Android platform. The HAL layer is between Linux kernel and android C++ libraries, it provides the following functions:
Access to hardware
Access to kernel drivers or proprietary user-space drivers
Support for the driver without standard APIs (e.g. vibrator)
21. Android NDK 简介Android NDK提供一套原生API的系统头文件
Libc（c library）headers：C标准库
Libm（math library）headers：标准数学库
JNI interface headers：JNI接口
Libz（Zlib compression）headers：压缩库
Liblog（Android logging）header：log库
A Minimal set of headers for C++ support：一部分C++库
22. NDK 安装和配置系统和软件需求
Android SDK 1.5及以上版本
Windows XP/Vista/
Mac OS X 10.4.8/X86/
Linux
交叉编译环境：Cygwin http://www.cygwin.com/
33. Android应用程序的创建和调试创建HelloActivity项目
New -> Android Project
Create Project from
existing sample
Build Target: 编译目标的版本
Min SDK Version: 最小运行版本
运行HelloActivity
Run as Android Project
34. Android应用程序的创建和调试
35. Android应用程序的创建和调试Log方式调试
VERBOSE、DEBUG、INFO、WARN、ERRO
程序开关: if (IS_DEBUG) {
Log.d("TAG", "MSG");
设备开关: Java: if (Log.isLoggable("TAG", Log.INFO)) {
Log.d("TAG", "MSG");}
Adb Shell: setprop log.tag.TAG VERBOSE
Breakpoint:
Toggle breakpoint
Debug as
F5 step into F6 step over
am tools
adb shell
am start –n {包名}/{包名}.活动名
