Android Smart Dict - 数据库设计

最先就从数据库开始吧，首先必须搞清楚数据库的结构，后面的工作才好开展。

 

我希望用一张表记录所有的单词不管是四级还是托付，它就相当于一个单词池（好拗口），每个单词可以映射到不同的书里面，比如一个单词它可以是四级词汇，同时也是托付词汇，我们就不用重复记录这个单词。

 

就目前看来，我们需要3张表：

 

单词表：记录所有的单词，包括写法，音标，词性，解释，读音（暂时没这个，但是还是暂一位），解释，例句，单词的重要程度。够完整了吧，难道还要加上同义词和反义词？以后再说吧。

 

学习计划表： 此表记录当前学习的是那本书，学习单词的小组数（每本书不可能一次就学完吧，分成若干小组便于学习）， 当前学到哪一组。

 

书表： 记录书名和单词数。

 

代码如下：

 

单词表：

public class WordTable extends Table{ public static final String TABLE_NAME = "vocabulary"; public static final String COLUMN_NAME_WORD = "word"; public static final String COLUMN_NAME_SYMBOL = "symbol"; public static final String COLUMN_NAME_TRANSLATION = "translation"; public static final String COLUMN_NAME_PRONUNCIATION = "pronunciation"; public static final String COLUMN_NAME_EXAMPLES = "examples"; public static final String COLUMN_NAME_BOOKS = "books"; public static final String COLUMN_NAME_STUDY_COUNT = "study_count"; public static final String COLUMN_NAME_MISTAKE_COUNT = "mistake_count"; public static final String COLUMN_NAME_SEARCH_COUNT = "search_count"; public static final String COLUMN_NAME_LEVEL = "level"; public static void createTable(SQLiteDatabase db) { db.execSQL("CREATE TABLE IF NOT EXISTS" + TABLE_NAME + " (" + COLUMN_NAME_ID + " INTEGER PRIMARY KEY," + COLUMN_NAME_WORD + " TEXT," + COLUMN_NAME_SYMBOL + " TEXT," + COLUMN_NAME_TRANSLATION + " TEXT," + COLUMN_NAME_PRONUNCIATION + " TEXT," + COLUMN_NAME_EXAMPLES + " TEXT," + COLUMN_NAME_BOOKS + " TEXT," + COLUMN_NAME_STUDY_COUNT + " INTEGER," + COLUMN_NAME_MISTAKE_COUNT + " INTEGER," + COLUMN_NAME_SEARCH_COUNT + " INTEGER," + COLUMN_NAME_LEVEL + " INTEGER" + ");"); } public static void dropTable(SQLiteDatabase db) { db.execSQL("DROP TABLE " + TABLE_NAME); }}

 

书本表：

public class BookTable extends Table { public static final String TABLE_NAME = "book"; public static final String COLUMN_NAME_BOOK_NAME = "book_name"; public static final String COLUMN_NAME_WORD_NUMBER = "word_number"; public static void createTable(SQLiteDatabase db) { db.execSQL("CREATE TABLE IF NOT EXISTS" + TABLE_NAME + " (" + COLUMN_NAME_ID + " INTEGER PRIMARY KEY," + COLUMN_NAME_BOOK_NAME + " TEXT," + COLUMN_NAME_WORD_NUMBER + " INTEGER" + ");"); } public static void dropTable(SQLiteDatabase db) { db.execSQL("DROP TABLE " + TABLE_NAME); }}

 

计划表：

public class PlanTable extends Table { public static final String TABLE_NAME = "plan"; public static final String COLUMN_NAME_BOOKS = "books"; public static final String COLUMN_NAME_MODE = "mode"; public static final String COLUMN_NAME_CHAPTER_NUMBER = "chapter_number"; public static final String COLUMN_NAME_CURRENT_CHAPTER = "current_chapter"; public static void createTable(SQLiteDatabase db) { db.execSQL("CREATE TABLE IF NOT EXISTS" + TABLE_NAME + " (" + COLUMN_NAME_ID + " INTEGER PRIMARY KEY," + COLUMN_NAME_BOOKS + " TEXT," + COLUMN_NAME_MODE + " INTEGER," + COLUMN_NAME_CHAPTER_NUMBER + " INTEGER," + COLUMN_NAME_CURRENT_CHAPTER + " INTEGER" + ");"); } public static void dropTable(SQLiteDatabase db) { db.execSQL("DROP TABLE " + TABLE_NAME); }}