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http://developer.android.com/reference/android/app/ExpandableListActivity.html# public class ExpandableListActivityextends Activityimplements View.OnCreateContextMenuListener ExpandableListView.OnChi... 阅读全文
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http://wiki.rootzwiki.com/Google_Apps http://productforums.google.com/forum/#!forum/apps http://www.google.com/enterprise/apps/business/ http://www.hongkiat.com/blog/google-app-mail-for-free/ http://... 阅读全文
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http://source.android.com/devices/tech/power.html Battery usage information is derived from battery usage statistics and power profile values. Battery Usage Statistics Battery usage statistics are... 阅读全文
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http://source.android.com/devices/tech/storage/index.html Android supports devices with external storage, which is defined to be a case-insensitive filesystem with immutable POSIX permission classes ... 阅读全文
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#include <iostream>using namespace std; const int apple_size = 10;const int banana_size = 20; //********************************fruit interface class fruit{public: virtual void name()=0; virtual i... 阅读全文
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#include <stdio.h> struct st_test{ int a; int b;}; enum{ one, two,}; struct st_test tt[2]={ [two] = { .b=1, .a=0, }, [one] = {2,3,},}; int main(){ printf("%d\n",tt[two].b); return 0;} 如上图红色部... 阅读全文
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1、热插拔事件的产生 在编写的总线驱动程序的.uevet处理函数中通过环境变量上报给udevd2、udev信息查看 udevinfo –a –p /sys/devices/XXX3、udev规则的添加 如果想让事件触发自定义的行为，需在/etc/udev/rules.d目录下添加新的规则 例如添加文... 阅读全文
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PM notifier机制： 应用场景： There are some operations that subsystems or drivers may want to carry out before hibernation/suspend or after restore/resume, but they require the system to be fully functional,... 阅读全文
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１、需要的记录的信息 载体是java侧是类MotionEvent，cpp侧是gPointerCoordsClassInfo 记录的信息包括： public float x;public float y;public float pressure;public float size;public float touchMajor;public float touchMinor;public flo... 阅读全文
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动态电源管理(DPM)是很一个广泛的概念，很多系统实际上都采用了动态电源管理(DPM)方式。Linux很早就采用了动态电源管理，在driver目录下有个cpufreq的驱动程序，它就是用来动态调整CPU频率以降低能源消耗的。[1] 注：引文中说的不全对，cpufreq在平板中有采用，并不是不适用与嵌入式系统。 #include <linux/kernel.h> #include <linux/m... 阅读全文