public class MyDatabaseHelper extends SQLiteOpenHelper {
    public static final String CREATE_BOOK = "CREATE TABLE book ("
            + "id INTEGER PRIMARY KEY AUTOINCREMENT, "
            + "author TEXT, "
            + "price REAL, "
            + "pages INTEGER, "
            + "name TEXT)";
    private Context mContext;

    public MyDatabaseHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) {
        super(context, name, factory, version);
        mContext = context;
    }

    @Override
    public void onCreate(SQLiteDatabase sqLiteDatabase) {
        sqLiteDatabase.execSQL(CREATE_BOOK);
        Toast.makeText(mContext, "创建数据库成功！", Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {
    }
}