安卓大作业core包UML图

DatePeriod

+begin : long+end : end

weightscale.core

WeightDB

+DB_VERSION ： int +DB_NAME ： string+DB_PRIMARY_KEY : string+DB_TABLE_NAME : string+DB_TABLE_COLUMN_WEIGHT:string+DB_TABLE_COLUMN_DATE : string+DB_DEFAULT_ORDERBY : string+mDBHelper : DatabaseHelper+mDB : SQLiteDatabase+mDBDataChangeListener : OnDBDataChangeListener+mInstance : WeightDB-DB_TABLE_CREATE_SQL : string+OnDBDataChangeListener : interface

Weight

+ key : long+ value : string+ date : long

WeightDBHelper

DateHelper

+ DISPLAY_WEEK_FORMAT : string+ DISPLAY_DATE_FORMAT : strin

DatabaseHelper