LogCat 중 에러가 있는 부분만 올렸습니다.

왜 이런 에러가 발생할까요?

그리고 LogCat을 보고 '이런 문제가 있구나'하고 알고 싶은데 까막눈이네요.

 logCat을 이해하려면 어떤 것을 알아야 하나요.?

05-26 09:33:07.941: ERROR/BatteryService(65): usbOnlinePath not found
05-26 09:33:07.941: ERROR/BatteryService(65): batteryVoltagePath not found
05-26 09:33:07.941: ERROR/BatteryService(65): batteryTemperaturePath not found

05-26 09:33:29.871: ERROR/EventHub(65): could not get driver version for /dev/input/mouse0, Not a typewriter
05-26 09:33:29.871: ERROR/EventHub(65): could not get driver version for /dev/input/mice, Not a typewriter

05-26 09:33:30.401: ERROR/System(65): Failure starting core service
05-26 09:33:30.401: ERROR/System(65): java.lang.SecurityException
05-26 09:33:30.401: ERROR/System(65):     at android.os.BinderProxy.transact(Native Method)
05-26 09:33:30.401: ERROR/System(65):     at android.os.ServiceManagerProxy.addService(ServiceManagerNative.java:146)
05-26 09:33:30.401: ERROR/System(65):     at android.os.ServiceManager.addService(ServiceManager.java:72)
05-26 09:33:30.401: ERROR/System(65):     at com.android.server.ServerThread.run(SystemServer.java:184)


05-26 09:33:35.221: ERROR/SoundPool(65): error loading /system/media/audio/ui/Effect_Tick.ogg
05-26 09:33:35.241: ERROR/SoundPool(65): error loading /system/media/audio/ui/KeypressStandard.ogg
05-26 09:33:35.261: ERROR/SoundPool(65): error loading /system/media/audio/ui/KeypressSpacebar.ogg

05-26 09:33:35.261: ERROR/SoundPool(65): error loading /system/media/audio/ui/KeypressDelete.ogg
05-26 09:33:35.271: ERROR/SoundPool(65): error loading /system/media/audio/ui/KeypressReturn.ogg

05-26 09:33:57.111: WARN/ActivityManager(65): finishReceiver called but none active
05-26 09:33:57.142: ERROR/ActivityManager(65): Start proc android.process.acore for content provider com.android.providers.contacts/.ContactsProvider2: pid=158 uid=10000 gids={3003, 1015}Load: 2.45 / 0.78 / 0.27
05-26 09:33:57.142: ERROR/ActivityManager(65): CPU usage from 14987ms to 4293ms ago:
05-26 09:33:57.142: ERROR/ActivityManager(65):   system_server: 31% = 20% user + 11% kernel / faults: 2891 minor 1 major
05-26 09:33:57.142: ERROR/ActivityManager(65):   app_process: 14% = 9% user + 4% kernel / faults: 2009 minor 1 major
05-26 09:33:57.142: ERROR/ActivityManager(65):   bootanimation: 8% = 6% user + 1% kernel / faults: 503 minor
05-26 09:33:57.142: ERROR/ActivityManager(65):   zygote: 0% = 0% user + 0% kernel / faults: 83 minor
05-26 09:33:57.142: ERROR/ActivityManager(65):   sh: 0% = 0% user + 0% kernel / faults: 117 minor
05-26 09:33:57.142: ERROR/ActivityManager(65):   netd: 0% = 0% user + 0% kernel / faults: 21 minor
05-26 09:33:57.142: ERROR/ActivityManager(65):   kswapd0: 0% = 0% user + 0% kernel
05-26 09:33:57.142: ERROR/ActivityManager(65):   qemud: 0% = 0% user + 0% kernel / faults: 10 minor
05-26 09:33:57.142: ERROR/ActivityManager(65):   events/0: 0% = 0% user + 0% kernel
05-26 09:33:57.142: ERROR/ActivityManager(65):   pdflush: 0% = 0% user + 0% kernel
05-26 09:33:57.142: ERROR/ActivityManager(65):  +putmethod.latin: 0% = 0% user + 0% kernel
05-26 09:33:57.142: ERROR/ActivityManager(65):  +m.android.phone: 0% = 0% user + 0% kernel
05-26 09:33:57.142: ERROR/ActivityManager(65):  +ndroid.launcher: 0% = 0% user + 0% kernel
05-26 09:33:57.142: ERROR/ActivityManager(65):  +ndroid.settings: 0% = 0% user + 0% kernel
05-26 09:33:57.142: ERROR/ActivityManager(65): TOTAL: 100% = 60% user + 39% kernel