As an Android developer, it's very painful when the log doesn't print. Believe that someone has encountered the ADB connection is normal, in the development tool also normal display device information is normal but can not print log or can only print part of the log, it may be possible to try to enter the project mode debug log log level.
My is 360 Youth edition, take this handset as an example, first enters the dial-up interface input "*20121220#" (different brand enters the method not the same, can own Baidu), enters the interface 1:
Enter log output Level Interface 2:
First determine whether the log printing is turned on, if not turned on please open Interface 3, 4:
Then go to log log level, which has Android as an example:
As for the level of the specific explanations please go out in person to left the Baidu keyword "Java log level" or "Android Java log Level"
About Android phones can't print log logs