Using adb logcat with a real phone (and not the emulator)

user_425749 0
Viewed 89951

when I'm using the Android emulator I can do "adb logcat" to see output messages (log / system.out.println) originated from my code. It also shows the stack trace of exceptions which happen during execution.

But, when I'm using a real phone, "adb logcat" does not do / show anything.

I also tried "adb -d logcat" which also does not display anything.

Is there any way to get it working with the real phone?

Thanks.

UPDATE:

I just tried "adb -s ? logcat" ('?' is the serial number of the device) and also got no results.

I tried another "adb" command to see if anything was working: "adb -s ? bugreport". This printed a lot of stuff. Example: "Memory Info", "CPU Info" and some Java specific things. So it seams that some stuff is working.

logcat adb android
12 Answers

  1. Enable USB debugging on your device.

  2. Connect the device to computer

  3. Use these commands:

Get the "device id"

adb devices

example:

$ adb devices
List of devices attached
5856423841563398    device
emulator-5554   device

To specify the device when using logcat

adb -s "device id" logcat

example:

$ adb -s 5856423841563398 logcat
--------- beginning of crash
03-31 15:56:51.174 13547 13547 E AndroidRuntime: FATAL EXCEPTION: main
user_10702510
  1. Enable USB debugging in your device.
  2. Connect your device to computer
  3. Open Android Studio
  4. Click on View/Tool Windows/Logcat (or Alt+6)
  5. Select your device on the top left combo box

enter image description here

user_9489380

On the windows command/Linux shell, issue the command below, 

adb devices

if the device is not listed in result, then install "APK installer", which can help install the adb driver in your windows machine. Link is below:

http://apkinstaller.com/downloads/

Check the listing again with the command above in the shell/cmd, and if the device is listed then Log Cat will surly work.

After that you can try:

adb -d logcat

Check the tutorial on YouTube: https://youtu.be/vO0Wf0E6Z4o

Happy Coding :-)

user_7873990
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