I want to write all logs displayed in logcat into a file when my application crashes (forced close) or else also.Is there ane way to get Logs programatically ? or is there ane way to know when my application crashed?
I dont want to use "adb logcat " command. Plz help me out
Have a look at this microlog4android
and also go through this question too How do you save an Android application log to a file on a physical device?
Copied "Lars Blumberg" answer for your quick reference:
$ adb shell stop
$ adb shell setprop log.redirect-stdio true
$ adb shell start
Refer for more info: Viewing stdout and stderr
If you want write your own Log function, see this answer Android Writing Logs to text File
Related
I am trying to debug a Yocto project. I have flashed cpp binaries on some device.
Now I my trying to display logs using below adb command
adb shell tail -f /var/log/acs_main.log
The problem i'm facing is that logs are not displayed continuously.I have to cancel and again start to print further log statements.
Anyone can help me in this ?
i use some batch script for android device , it should clear The device log , start and close an apk and then take the log out of it.
thats my code i use:
adb -s %DeviceId% logcat -c
adb -s %DeviceId% shell am start -n com.mv4d.sdktutorialbasicchangeframesize/com.mv4d.sdktutorialbasicchangeframesize.MainActivity
SLEEP 80
adb -s %DeviceId% shell am force-stop com.mv4d.sdktutorialbasicchangeframesize
adb -s %DeviceId% logcat -d -v time > D:\Roey\Jen2\ChangeFrameSize\Results\Logcat\AndroidLog.txt
the created log is missing lot of first and last lines. (that appears if you start the app and check the live log via android studio for example...) any ideas ?
adb logcat -d [file] will only dump the logs currently in memory, not all logs since the device boot.
The logs stored by LogCat are circular, which means that when the allocated space for logs starts to run out, LogCat with delete older logs to make space for newer logs. That means you can only have a certain number log lines in memory at any given time (usually set to something like 16kb).
To be able to get all logs you will have to make LogCat write logs out to a specific file, instead of just keeping them in memory.
You can do this with the following command:adb logcat -f [file].
This will make LogCat write out any log in memory and any future log to the specified file.
NOTE: The specified file must be on the device itself and can be pulled from the device.(adb pull [device file] [destination file])
There are several questions about the subject, however not one of them seems to address the particular problem I'm having.
I'm developing an app with Cordova/Ionic, and printing debugging info I was outputting with console.log() by using adb logcat CordovaLog:D *:S was working just fine until some updates. Now I can't seem to figure out how to properly filter logcat's output so I could only get the debugging info from my app.
Logging itself works. If I set no filters and redirect output to a file, I can see my debugging info among all the other debug messages, and it looks like this:
I/Web Console: Event triggered: device.ready:1
Logging to screen also works, but at a rate of approximately 100 lines per second. I've tried at least the following to filter output:
adb logcat -s "Web Console"
adb logcat "Web Console":V
adb logcat "Web Console":*
adb logcat -s Web
adb logcat Web:V
adb logcat "myApp":V
adb logcat myApp:V
adb logcat -s myApp
... and probably others I've already forgotten. They either print absolutely nothing, or absolutely everything from the system services.
I'm on Windows so I can't grep, and the device I'm debugging on is running Android 4.2.2 so I can't use GapDebug, and neither does it seem to be possible to access the device's log via chrome://inspect in Chrome.
I really, really would like to understand how filtering logcat's output works. I'm not willing to log everything to a file and then shift through that.
It seems that logcat can not properly parse tag names with whitespaces. So instead I suggest using grep on the device:
adb shell "logcat | grep 'Web Console'"
Alternatively when runing adb on linux or unix based os/git bash:
adb logcat | grep 'Web Console'
What works for me in 2019:
adb -d logcat chromium:I *:S
The -d indicating a physical device in my case. If all else fails just dump the results of adb logcat into a text file and do a search for "CONSOLE", that will give you the provider for your logcat filter. It seems this changes over time, and depending on your particular dev environment.
While you can use grep under Linux/Unix, findstr might be your choice under Windows:
adb logcat | findstr /C:"Web Console"
If you prefer to use grep under Windows, you can get it from
http://gnuwin32.sourceforge.net/packages/grep.htm.
Can anyone tell me how can we get adb logs using eggPlant automation tool.Actually i want to have adb logs for my device when running eggPlant scripts.
Please help me out in this situation.
Actually, the previous answer is incorrect as adb command support does exist in eggPlant. There are ways to get adb logs in eggPlant. Here's how:
adb logcat is the command that enables getting adb logs. (Warning: This will print a ton of info!)
You need a way to execute adb logcat within eggPlant. This is accomplished using the shell command
On some systems (I am using eggPlant for Windows) you need to dump the output of the shell command to a file and then read the file back into a variable.
I guess there is no such command or something else.eggPlant identifies only object or script to execute the command.
I want to write log from my android device to the file under Windows XP.
I'm trying to use command:
adb logcat -f test
But it returns:
log file locked.couldn't open output file: Bad file number
If I use
adb logcat >test
then it works OK, but it doesn't show anything to the console.
I thought that using "-f" option would show data in console and simultaneously write to the file.
How to do it?
Just sharing in case someone fall here.
The -f options expects a path from phone folder (and not from your PC). For example:
adb logcat -f /sdcard/test.txt
Then, after stopping the log, you must pull that file from phone:
adb pull /sdcard/test.txt