Python无法捕获完整的ADB日志

Question

What I want to achieve - running adb log (logs are running), doing some activity on android, stop/end log capture (ctrl+c), post processing of logs.

Only issue which i face - can not capture full logcat log in file

import sys 
import subprocess
import time
import ctypes

# start

print "test start"
time.sleep(5)

# log capturing start, log does not stop it will keep on running
proc = subprocess.Popen("adb logcat -v time",stdout=subprocess.PIPE )
time.sleep(3) # just so it runs for a while


print "calc start"
time.sleep(5)
#START test************************************

Some code for testing



#CTRL C*************************************************

try:
    ctypes.windll.kernel32.GenerateConsoleCtrlEvent(0, 0)
    proc.wait()
except KeyboardInterrupt:
    print "ignoring ctrlc"
print "still running"


#********************adb log saving******************

text = proc.stdout.read()

f = open('C:\Python27\out_logs_dd\log.txt', 'w')

f.write(text)

with open('C:\Python27\out_logs_dd\log.txt', 'w') as f:
   f.write(text)

f.close()

When I run this code, everything is running but log size is so small. I searched and came to know that "proc.communicate()" might be the solution. I tried 'communicate' but could not solve the issue. any help pointer pls.

Answer 1

Replacing proc.stdout.read() with proc.stdout.readline() solved it for me. stdout.read() reads everything until EOF - slowing down the speed drastically. A similar question: Communicate with subprocess without waiting for the subprocess to terminate on windows

Answer 2

you can use adb shell logcat instead of abd logcat in

proc = subprocess.Popen("adb shell logcat -v time",stdout=subprocess.PIPE)

it will give all logs.

i hope it will work.