// ===========sql语句方式操作SQLite数据库================================
public void insert() { db.execSQL("insert into person(name, phone, money) values(?, ?, ?)", new Object[] { "大明", "18666", 6000 }); db.execSQL("insert into person(name, phone, money) values(?, ?, ?)", new Object[] { "小红", "18666", 6000 }); db.execSQL("insert into person(name, phone, money) values(?, ?, ?)", new Object[] { "大红", "18666", 6000 }); } public void delete() { db.execSQL("delete from person where name = ?", new Object[] { "大明" }); } public void update() { db.execSQL("update person set money = 10000 where name = ?", new Object[] { "小明" }); } public void query() { // 游标，存放查询返回的数据，获取方法跟resultSet高度雷同 Cursor c = db.rawQuery("select * from person", new String[] {}); while (c.moveToNext()) { String name = c.getString(c.getColumnIndex("name")); String phone = c.getString(c.getColumnIndex("phone")); System.out.println(name + ";" + phone); } } |
// ==============谷歌提供的api对SQLite数据库的操作======================
/** * api-insert data to table */ public void insertApi() { ContentValues cv = new ContentValues(); cv.put("name", "微明"); cv.put("phone", 15666); cv.put("money", 630); long id = db.insert("person", null, cv); System.out.println(id); } /** * api-delete data from table * * @return the number of rows affected */ public int deleteApi() { int affectedNum = db.delete("person", "name=?", new String[] { "小红" }); return affectedNum; } /** * api-update */ public void updateApi() { ContentValues contentValues = new ContentValues(); contentValues.put("name", "小红"); contentValues.put("money", "10"); // return the number of rows affected db.update("person", contentValues, "name=?", new String[] { "大红" }); } public void queryApi() { Cursor cursor = db.query("person", new String[] { "phone", "money" }, null, null, null, null, null); while (cursor.moveToNext()) { String phone = cursor.getString(cursor.getColumnIndex("phone")); String money = cursor.getString(cursor.getColumnIndex("money")); System.out.println(phone + "##" + money); } } |
