sqlite 增删改查完整例子。

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先看效果图：

PersonDao1.java

package mm.shandong.com.testsqlsqllite.dao;

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


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

import mm.shandong.com.testsqlsqllite.entity.Person;
import mm.shandong.com.testsqlsqllite.util.StudySQLiteOpenHelper;

/**
 * Created by buyadong on 2016/8/7.
 */
public class PersonDao1 {
    Context context;
    StudySQLiteOpenHelper studySQLiteOpenHelper;

    public PersonDao1(Context context) {
        this.context = context;
        studySQLiteOpenHelper = new StudySQLiteOpenHelper(context, "androidStudy.db", 7);
    }

    public void addPerson(Person person) {
        SQLiteDatabase db = studySQLiteOpenHelper.getWritableDatabase();
        String sql = "insert into person(_id,name,sex,age,code) values(null,?,?,?,?)";
        db.execSQL(sql,new Object[]{person.getName(),
                person.getSex(), person.getAge(), person.getCode()});
    }

    public void deletePerson(Person person) {
        SQLiteDatabase db = studySQLiteOpenHelper.getWritableDatabase();
        String sql = "delete from person where _id=?";
        db.execSQL(sql, new Object[]{person.get_id()});
    }

    public void updatePerson(Person person) {
        SQLiteDatabase db = studySQLiteOpenHelper.getWritableDatabase();
        String sql = "update person set name=?,sex=?,age=?,code=? where _id=?";
        db.execSQL(sql, new Object[]{person.getName(), person.getSex(),
                person.getAge(), person.getCode(), person.get_id()});
    }

    public List<Person> getAllPerson() {
        List<Person> persons = new ArrayList<Person>();
        SQLiteDatabase db = studySQLiteOpenHelper.getWritableDatabase();
        String sql = "select * from person";
        Cursor cursor = db.rawQuery(sql, null);
        while (cursor.moveToNext()) {
            String name = cursor.getString(cursor.getColumnIndex("name"));
            String sex = cursor.getString(cursor.getColumnIndex("sex"));
            int age = cursor.getInt(cursor.getColumnIndex("age"));
            String code = cursor.getString(cursor.getColumnIndex("code"));
            int _id = cursor.getInt(cursor.getColumnIndex("_id"));
            Person person = new Person(name, sex, age, code);
            person.set_id(_id);
            persons.add(person);
        }
        return persons;
    }
}

　　 Person实体类

 

package mm.shandong.com.testsqlsqllite.entity;

import java.io.Serializable;

/**
 * Created by 安卓无忧 on 2016/7/27.
 */
public class Person implements Serializable{
      private  String name;
      private  int age;
      private String code;
      private String sex;

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    private String first_letter;
      private int _id;

    public void set_id(int _id) {
        this._id = _id;
    }

    public int get_id() {

        return _id;
    }

    public void setFirst_letter(String first_letter) {
        this.first_letter = first_letter;
    }

    public String getFirst_letter() {

        return first_letter;
    }

    public Person(){

    }
    public Person(String name, int age, String code){
        this.name=name;
        this.age=age;
        this.code=code;
    }
    public Person(String name,String sex, int age, String code){
        this.name=name;
        this.age=age;
        this.code=code;
        this.sex=sex;
    }
    @Override
    public String toString() {
        return  name +" "+age+" "+code;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {

        return age;
    }

    public String getCode() {
        return code;
    }

    public String getName() {
        return name;
    }
}