可能是CPU占有率过高引起的。
查看：dab shell top -d 10 -m 1
ANR
http://rayleeya.iteye.com/blog/1955657
ADB 常用命令
http://www.cnblogs.com/playing/archive/2010/09/19/1830799.html
http://www.cnblogs.com/bangerlee/articles/2568776.html
Stric调试
http://www.androidlearner.net/use-strictmode.html
http://www.cnblogs.com/zelos/archive/2011/02/27/1966403.html