Adroid 2.1 architecture resolution 11 system time

11 system time 11.1 Time Operation

File: Frameworks/base/CORE/Java/Android/OS/systemclock. Java

Native public static Boolean setcurrenttimemillis (long millis );

Switch to the following file

File: Frameworks/base/CORE/JNI/android_ OS _systemclock.cpp

Static jboolean android_ OS _systemclock_setcurrenttimemillis (jnienv * ENV,

Jobject clazz, jlong millis)

{

Return (setcurrenttimemillis (millis) = 0 );

}

Switch to the following file

File: Frameworks/base/libs/utils/systemclock. cpp

Int setcurrenttimemillis (int64_t millis)

{

...

# If have_android_ OS

FD = open ("/dev/alarm", o_rdwr );

If (FD <0 ){

Logw ("unable to open alarm DRIVER: % s/n", strerror (errno ));

Return-1;

}

TS. TV _sec = TV. TV _sec;

TS. TV _nsec = TV. TV _usec * 1000;

Res = IOCTL (FD, android_alarm_set_rtc, & TS );

If (RES <0 ){

Logw ("unable to set RTC to % ld: % s/n", TV. TV _sec, strerror (errno ));

Ret =-1;

}

Close (FD );

# Else

...

}

That is, to operate the device/dev/alarm