You must supply a layout_width attribute

발생 : 인텐트로 .ItemEdit 액티비티를 호출 할 때 발생 

10-20 09:00:59.928: DEBUG/dalvikvm(207): GC freed 43 objects / 2096 bytes in 235ms
10-20 09:01:05.298: DEBUG/dalvikvm(107): GC freed 2132 objects / 124248 bytes in 232ms
10-20 09:01:32.229: WARN/KeyCharacterMap(321): No keyboard for id 0
10-20 09:01:32.238: WARN/KeyCharacterMap(321): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
10-20 09:01:33.140: INFO/ActivityManager(52): Starting activity: Intent { cmp=com.misun.smileproj.timemetrix/.ItemEdit }
10-20 09:01:33.269: DEBUG/AndroidRuntime(321): Shutting down VM
10-20 09:01:33.269: WARN/dalvikvm(321): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
10-20 09:01:33.278: ERROR/AndroidRuntime(321): Uncaught handler: thread main exiting due to uncaught exception
10-20 09:01:33.310: ERROR/AndroidRuntime(321): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.misun.smileproj.timemetrix/com.misun.smileproj.timemetrix.ItemEdit}: java.lang.RuntimeException: Binary XML file line #3: You must supply a layout_width attribute.
...

원인 : 레이아웃 설정파일에서 위젯의 layout_height 과 layout_width를 제대로 명시하지 않았다. 
해결 : 필수 속성값 명시하기