$ adb logcat
info: log device is empty!
关闭了log,解决方法:
http://stackoverflow.com/questions/6941710/unable-to-open-log-device-dev-log-main-no-such-file-or-directory
手机拨号
Dial this: ##2846579##
Service menu will appear.
Go to “ProjectMenu” -> “Background Setting” -> “Log Setting”
Open “Log switch” and set it to ON.
Open “Log level setting” and set the log level you wish.
Reboot the phone**
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