when “am start” a activity,what the “total time” m

问题:

I launch a activity use:

am start -W -n

The console output：

tangbincheng@tangbinchengdeMacBook-Pro:~$ adb shell

shell@hwp6-t00:/ $ su

root@hwp6-t00:/ # am start -W -n com.book2345.reader/com.book2345.reader.MainA>

Starting: Intent { cmp=com.book2345.reader/.MainActivity }

Status: ok

Activity: com.book2345.reader/.MainActivity

ThisTime: 1554

TotalTime: 42815

Complete

what the ThisTime and the TotalTime mean?

回答1:

search in android source code: You can find "thisTime/totalTime"

"thisTime": just current activity launched time

"totalTime":the activity you started may be on the bottom of activity stack. So it refers to the total time from activity searching to current activity launched.

final long thisTime = curTime - displayStartTime;
final long totalTime = stack.mLaunchStartTime != 0
        ? (curTime - stack.mLaunchStartTime) : thisTime;