JAVA日报

换汤不换药之家庭记账本app开发(dao)

package dao;

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

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

import bean.user;
import sqlite.db;
public class userdao {
    public double eat=0;
    public double play=0;
    public double clothes=0;
    public double live=0;
    public double usual=0;
    public double total=0;
    private final db Db;
    private static userdao userDao=null;
    private userdao(Context context){
        Db =new db(context);
    }
    public static userdao getInstance(Context context){
        if(userDao==null){
            userDao=new userdao(context);
        }
        return userDao;
    }
    public db getDb() {
        return Db;
    }
    //保存
    public void insert(user u){
        SQLiteDatabase db=Db.getWritableDatabase();
        ContentValues values=new ContentValues();
        values.put("date",u.get("date"));
        values.put("eat",u.get("eat"));
        values.put("play",u.get("play"));
        values.put("clothes",u.get("clothes"));
        values.put("live",u.get("live"));
        values.put("usual",u.get("usual"));
        db.insert("tex",null,values);
        db.close();
    }
    //获取
    public void delete(String id) {
        SQLiteDatabase db =Db.getWritableDatabase();
        if (db.isOpen()) {
            db.execSQL("delete from tex where date=?", new Object[]{id});
            db.close();
        }
    }//删除
    public List<user> findAll(){
        SQLiteDatabase db=Db.getWritableDatabase();
        Cursor cursor=db.query("tex",new String[]{"date","eat","play","clothes","live","usual"},null,null,null,null,null);
        List<user> userList=new ArrayList<>();
        while(cursor.moveToNext()){
            user u=new user();
            u.setDate(cursor.getString(0));
            u.setEat(cursor.getString(1));
            u.setPlay(cursor.getString(2));
            u.setClothes(cursor.getString(3));
            u.setLive(cursor.getString(4));
            u.setUsual(cursor.getString(5));
            //Log.e("sqliteshow",user.getName()+" "+user.getDate()+" "+user.getTime()+" "+user.getTem()+" "+user.getArea());
            userList.add(u);
        }
        total=eat+play+clothes+live+usual;
        db.close();
        return userList;
    }
    public  void Initdata(){
        SQLiteDatabase db=Db.getWritableDatabase();
        Cursor cursor=db.query("tex",new String[]{"date","eat","play","clothes","live","usual"},null,null,null,null,null);
        while(cursor.moveToNext()){
            eat = eat + Double.valueOf(cursor.getString(1));
            play = play + Double.valueOf(cursor.getString(2));
            clothes = clothes + Double.valueOf(cursor.getString(3));
            live = live + Double.valueOf(cursor.getString(4));
            usual = usual + Double.valueOf(cursor.getString(5));
        }
        total=eat+play+clothes+live+usual;
        db.close();
    }
    public void clear(){
        eat=0;play=0;clothes=0;live=0;usual=0;total=0;
    }
}