While working on more than one android devices attached to the same PC, at that time if you want to see a logcat output then there may be a problem you faced.(Its Not a problem but not known thing).
See, here i have started emulator and also attached my samsung galaxy phone. So at the same time 2 devices are connected to the same machine. So if you launched a “adb logcat” command then following console appear.
pm-paresh@comp35:~$ adb logcat - waiting for device - error: more than one device and emulator - waiting for device - error: more than one device and emulator - waiting for device - error: more than one device and emulator - waiting for device -
Solution:
Give device id with -s option same as below:
adb -s emulator-5556 logcat
Note that, if you issue a command without specifying a target emulator/device instance using -s, adb generates an error.
Here is a more info on Android: http://developer.android.com/guide/developing/tools/adb.html.
FYI, You can find out the attached devices by using adb devices command at console.
