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  • JAVA日报

    从零开始的体温app开发(dao)

    package dao;


    import android.content.ContentValues;
    import android.content.Context;
    import android.database.Cursor;
    import android.database.sqlite.SQLiteDatabase;
    import android.util.Log;

    import java.util.ArrayList;
    import java.util.List;

    import bean.User;
    import db.Sqlite;
    public class UserDao {
    private final Sqlite sqlite;
    private static UserDao userDao=null;
    private UserDao(Context context){
    sqlite =new Sqlite(context);
    }
    public static UserDao getInstance(Context context){
    if(userDao==null){
    userDao=new UserDao(context);
    }
    return userDao;
    }
    //保存
    public void insert(User user){
    SQLiteDatabase db=sqlite.getWritableDatabase();
    ContentValues values=new ContentValues();
    values.put("name",user.get("name"));
    values.put("num",user.get("num"));
    values.put("cl",user.get("cl"));
    values.put("date",user.get("date"));
    values.put("time",user.get("time"));
    values.put("area",user.get("area"));
    values.put("tem",user.get("tem"));
    values.put("qw",user.get("qw"));
    db.insert("text",null,values);
    db.close();
    }
    //获取
    public List<User> findAll(){
    SQLiteDatabase db=sqlite.getWritableDatabase();
    Cursor cursor=db.query("text",new String[]{"name","num","cl","date","time","area","tem","qw"},null,null,null,null,null);
    List<User> userList=new ArrayList<>();
    while(cursor.moveToNext()){
    User u=new User();
    u.setName(cursor.getString(0));
    u.setNum(cursor.getString(1));
    u.setCl(cursor.getString(2));
    u.setDate(cursor.getString(3));
    u.setTime(cursor.getString(4));
    u.setArea(cursor.getString(5));
    u.setTem(cursor.getString(6));
    u.setQw(cursor.getString(7));
    userList.add(u);
    }
    db.close();
    return userList;
    }

    }
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  • 原文地址:https://www.cnblogs.com/mumulailai/p/14906240.html
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