问题
For my android app development, I am trying to get logcat messages from my real device (when starting an app on it from eclipse) and not just from my emulator.
Does someone know how to enable such a feature?
回答1:
You need to enable USB Debugging on your device. Go to settings, applications, development and tick "USB Debugging". Then when your device is connected by USB you can see its name in DDMS as if it was another emulator.
回答2:
It works like the emulator, use the ddms or eclipse plugin to get the logcat from your app running on devices.
Otherwise you have always the options to use a Log Collector app (download a free one from Market), you can tell your users to use such app if they want to send you the log.
回答3:
Sometimes, you have to explicitly enable debugging on a real device.
- It could be that a device android image is built with debuggable property as off (you can check that by running
adb shell getprop). In this case you need to declare your app as debuggable in the AndroidManifest.xml (<application .... android:debuggable="true">). This is actually explicitly stated in the Android Dev Guide here (Under Set up your device for development, which also mentions turning on "USB Debugging" and a couple more tweaks). - Some devices (e.g. Motorola Cliq) disable by default all verbose and debug log messages.
For it to work, you must run
adb shell setprop log.debug_level 1on the device and only then debug messages work (that is, until you power-cycle the device).
回答4:
I think you should install first a suitable usb driver for your android device then your eclipse will recognize your device as an android device and start debugging
来源：https://stackoverflow.com/questions/3060982/enable-log-messages-from-real-device-on-logcat