USB Debugging Applications on Samsung Tablet

Android Tutorials - Herong's Tutorial Examples

∟USB Debugging Applications on Samsung Tablet

∟Running "adb" on USB Debugging Interface

This section provides a tutorial example on how to run 'adb' commands on Samsung Android mini tablet through the USB debugging interface. 'adb -d' is to run commands on the USB connected Android device. But if there is only 1 device, '-d' option is not needed.

With my Samsung Galaxy Tab 3 mini tablet connected in USB debugging mode, I can try some Android SDK debugging tools on my Windows computer now.

1. Try the ADB (Android Debugging Bridge) tool to list the device:

C:\herong>\local\android-sdk-windows\platform-tools\adb devices
List of devices attached
5200e5505ae3a000   unauthorized

Cool. My tablet is showing up as "5200e5505ae3a000". But it is flagged as "unauthorized" for some reason.

2. Go back to the tablet, go to "Settings > Developer options", uncheck "USB debugging" and check it again.

3. Tap OK on the warning message. You will see an authorization request message:

Allow USB debugging?
The computer's RSA key fingerprint is "....".
[x] Always allow from this computer.

4. Check "Always allow..." and tap OK.

5. Go back to Windows computer, and run the "adb devices" command again:

C:\herong>\local\android-sdk-windows\platform-tools\adb devices
List of devices attached
5200e5505ae3a000   device

6. Run some other "adb" commands:

C:\herong>\local\android-sdk-windows\platform-tools\adb -d shell \
   uptime
up time: 1 days, 02:25:28, idle time: 1 days, 10:38:29, sleep time: 08:35:28

C:\herong>\local\android-sdk-windows\platform-tools\adb shell \
   ping localhost
PING localhost (127.0.0.1) 56(84) bytes of data.
64 bytes from localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.291 ms
64 bytes from localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.173 ms
64 bytes from localhost (127.0.0.1): icmp_seq=3 ttl=64 time=0.166 ms
...
   Ctrl-C

C:\herong>\local\android-sdk-windows\platform-tools\adb -d shell

shell@lt02wifi:/ $ df
/mnt/secure/asec: Permission denied
Filesystem              Size     Used     Free   Blksize
/dev                  416.2M   164.0K   416.0M      4.0K
/mnt/secure           416.2M     0.0K   416.2M      4.0K
/mnt/asec             416.2M     0.0K   416.2M      4.0K
/mnt/obb              416.2M     0.0K   416.2M      4.0K
/preload              196.7M   182.6M    14.1M      4.0K
/system                 1.4G     1.2G   218.1M      4.0K
/efs                   11.8M     4.1M     7.7M      4.0K
/cache                196.7M    51.4M   145.3M      4.0K
/data                   5.3G     2.1G     3.2G      4.0K
/NVM                   15.7M     4.2M    11.5M      4.0K
/tmp                  416.2M     0.0K   416.2M      4.0K
/mnt/shell/emulated     5.3G     2.1G     3.2G      4.0K

shell@lt02wifi:/ $ exit
exit

C:\herong>\local\android-sdk-windows\platform-tools\adb -d logcat
...
...
I/ServiceManager(  119): Waiting for service com.marvell.FileMonito...
I/ServiceManager(  119): Waiting for service com.marvell.FileMonito...
I/ServiceManager(  119): Waiting for service com.marvell.FileMonito...
V/AlarmManager(  548): waitForAlarm result :8
D/KeyguardClockWidgetService(  930): onReceive action=android.inten...
V/AlarmManager(  548): ClockReceiver onReceive() ACTION_TIME_TICK
D/KeyguardUpdateMonitor(  645): received broadcast android.intent.a...
D/KeyguardUpdateMonitor(  645): handleTimeUpdate
D/STATUSBAR-IconMerger(  645): checkOverflow(420), More:false, Req:...
I/ServiceManager(  119): Waiting for service com.marvell.FileMonito...
I/ServiceManager(  119): Waiting for service com.marvell.FileMonito...
W/        (  119): FileMonitorService not published, waiting...
...
   Ctrl-C

What I learned here are:

I have one Android device connected to my Windows system to play: "5200e5505ae3a000" representing the mini tablet connected on USB.
Authorization on the mini tablet is required to allow USB debugging
If there is only 1 Android device connected, I can run "adb" command without the "-d" option.
You need to press "<Ctrl>-C" to stop some "adb" commands.