数据存储——SQLite

SQLiteDatabase sqLiteDatabase = openOrCreateDatabase("myDB",MODE_PRIVATE,null);
sqLiteDatabase.execSQL("create table if not exists " +
"userInfo(_id integer primary key autoincrement," +
"name text not null, " +
"sex text not null)");
sqLiteDatabase.execSQL("insert into userInfo(name,sex) values('张三','男')");
Cursor cur = sqLiteDatabase.rawQuery("select * from userInfo", null);
while(cur.moveToNext()){
Log.i("myDB","_id="+cur.getInt(cur.getColumnIndex("_id")));
Log.i("myDB","name="+cur.getString(cur.getColumnIndex("name")));
Log.i("myDB","sex="+cur.getString(cur.getColumnIndex("sex")));
}
cur.close();
sqLiteDatabase.close();

SQLiteDatabase db = openOrCreateDatabase("testDB",MODE_PRIVATE,null);
db.execSQL("create table if not exists stuInfo" +
"(_id integer primary key autoincrement," +
"stu_num text not null," +
"stu_name text not null)");
ContentValues values = new ContentValues();
values.put("stu_num","131110101");
values.put("stu_name", "张三");
db.insert("stuInfo", null, values);
values.put("stu_num","123456789");
db.update("stuInfo",values,"stu_num='131110101'",null);
Cursor cur = db.query("stuInfo",null,"stu_name='张三'",null,null,null,null,null);
while(cur.moveToNext()){
Log.i("tag",cur.getString(cur.getColumnIndex("stu_num"))+"  "+cur.getString(cur.getColumnIndex("stu_name")));
}
cur.close();
db.close();