欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识！
您现在的位置是： 首页

sqlite 增删改查 博客分类： 数据存储 sqlliteSQLiteOpenHelpersqllite增删改查android数据库

程序员文章站 2024-02-09 11:22:58
...

先看效果图：

 
sqlite 增删改查 博客分类： 数据存储 sqlliteSQLiteOpenHelpersqllite增删改查android数据库
 

 

 

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;
    }
}

 StudySQLiteOpenHelper

package mm.shandong.com.testsqlsqllite.util;

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

/**
 * Created by 安卓无忧 on 2016/7/10.
 */
public class StudySQLiteOpenHelper extends SQLiteOpenHelper {
    String dataBase_name;
    Context context;
    String create_TABLE_sql="create table person(_id INTEGER PRIMARY KEY AUTOINCREMENT," +
            "name varchar(30),age integer,sex varchar(30),code varchar(30))" ;
    String delete_Sql="delete from person";

    public StudySQLiteOpenHelper(Context context, String name, int verson){
        super(context,name,null,verson);
        this.context=context;
    }
    @Override
    public void onCreate(SQLiteDatabase sqLiteDatabase) {
          sqLiteDatabase.execSQL(create_TABLE_sql);
    }

    @Override
    public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {
       

    }
}

 

 activity

 

package mm.shandong.com.testsqlsqllite;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;



import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import mm.shandong.com.testsqlsqllite.dao.PersonDao1;
import mm.shandong.com.testsqlsqllite.entity.Person;

public class TestSQLSqlLiteActivity extends AppCompatActivity {
    ListView listView;
    List<Person> persons;
    PersonDao1 personDao;
    BaseAdapter personAdapter;
    Map<String,Boolean> radioStates;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test_sqlsql_lite);
        radioStates=new HashMap<String,Boolean>();
        personDao=new PersonDao1(this);
        listView= (ListView) findViewById(R.id.listView);
        persons=personDao.getAllPerson();
        initListView();
    }
    public void initListView(){
        personAdapter=new BaseAdapter() {
            @Override
            public int getCount() {
                return persons.size();
            }
            @Override
            public Object getItem(int position) {
                return persons.get(position);
            }

            @Override
            public long getItemId(int position) {
                return position;
            }
            @Override
            public View getView(final  int position, View view, ViewGroup viewGroup) {
                view=getLayoutInflater().inflate(R.layout.item_sqlite_listview,null);
                TextView textViewPerson_name= (TextView) view.findViewById(R.id.textViewPerson_name);
                TextView textViewPerson_sex= (TextView) view.findViewById(R.id.textViewPerson_sex);
                TextView textViewPerson_code=(TextView)view.findViewById(R.id.textViewPerson_code);
                TextView textViewPerson_age= (TextView) view.findViewById(R.id.textViewPerson_age);
                final Person person= (Person) getItem(position);
                textViewPerson_name.setText(person.getName());
                textViewPerson_age.setText(person.getAge()+"");
                textViewPerson_sex.setText(person.getSex());
                textViewPerson_code.setText(person.getCode());
                RadioButton radioButton= (RadioButton) view.findViewById(R.id.radioButton);
                radioButton.setOnClickListener(new View.OnClickListener() {
                       @Override
                       public void onClick(View view) {
                           if(view instanceof RadioButton) {
                               RadioButton radioButton = (RadioButton) view;
                               if (radioButton.isChecked()) {
                                   radioStates.put(String.valueOf(position), true);
                                   for (String key : radioStates.keySet()) {
                                       if (!key.equals(String.valueOf(position))) {
                                           radioStates.put(key, false);
                                       }
                                   }
                                   notifyDataSetChanged();
                               }
                           }

                       }
                   }
                );
                Boolean tempState=radioStates.get(String.valueOf(position));
                if(tempState!=null&&tempState){
                    radioButton.setChecked(true);
                    view.setBackgroundColor(Color.BLUE);
                }else{
                    radioButton.setChecked(false);
                    view.setBackgroundColor(Color.WHITE);
                }
                return view;
            }
        };
        listView.setAdapter(personAdapter);
    }
    public void addPerson(View view){
        AlertDialog.Builder builder= new AlertDialog.Builder(this);
        builder.setTitle("新增用户").create();
        View childView=getLayoutInflater().inflate(R.layout.layout_sqlite_alert,null);
        builder.setView(childView);
        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                Field field = null;
                try {
                    field = dialogInterface.getClass().getSuperclass().getDeclaredField("mShowing");
                    field.setAccessible(true);
                    field.set(dialogInterface, true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
        builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {

                try {
                    Field field = dialogInterface.getClass().getSuperclass().getDeclaredField("mShowing");
                    field.setAccessible(true);
                    field.set(dialogInterface,false);
                    AlertDialog ad;
                    if(dialogInterface instanceof AlertDialog){
                        ad= (AlertDialog) dialogInterface;
                        EditText editViewPerson_name=
                                (EditText) ad.findViewById(R.id.editViewPerson_name);
                        EditText editViewPerson_code=
                                (EditText) ad.findViewById(R.id.editViewPerson_code);
                        EditText editViewPerson_age=
                                (EditText) ad.findViewById(R.id.editViewPerson_age);
                        RadioGroup radioGroupSex=
                                (RadioGroup) ad.findViewById(R.id.radioGroupSex);
                        if(TextUtils.isEmpty(editViewPerson_name.getText().toString())){
                            Toast.makeText(TestSQLSqlLiteActivity.this,
                                    "姓名不能为空",Toast.LENGTH_SHORT).show();
                            return;
                        }
                        if(TextUtils.isEmpty(editViewPerson_code.getText().toString())){
                            Toast.makeText(TestSQLSqlLiteActivity.this,
                                    "编号不能为空",Toast.LENGTH_SHORT).show();
                            return;
                        }
                        if(TextUtils.isEmpty(editViewPerson_age.getText().toString())){
                            Toast.makeText(TestSQLSqlLiteActivity.this,
                                    "年龄不能为空",Toast.LENGTH_SHORT).show();
                            return;
                        }
                        Person person=new Person();
                        person.setAge(Integer.parseInt(editViewPerson_age.getText().toString()));
                        person.setName(editViewPerson_name.getText().toString());
                        person.setCode(editViewPerson_code.getText().toString());
                        RadioButton radioButton= (RadioButton) radioGroupSex.
                                findViewById(radioGroupSex.getCheckedRadioButtonId());
                        person.setSex(radioButton.getText().toString());
                        personDao.addPerson(person);
                        persons=personDao.getAllPerson();
                        radioStates=new HashMap<String,Boolean>();
                        personAdapter.notifyDataSetChanged();
                        field.set(dialogInterface,true);
                    }

                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
        builder.show();

    }
    public void deletePerson(View view){
        int position=-1;
        for(int i=0;i<listView.getChildCount();i++){
            View childView=listView.getChildAt(i);
            RadioButton radioButton= (RadioButton) childView.findViewById(R.id.radioButton);
            if(radioButton.isChecked()){
                position=i;
                break;
            }
        }
        if(position!=-1){
            Person person= persons.get(position);
            personDao.deletePerson(person);
            persons=personDao.getAllPerson();
            radioStates=new HashMap<String,Boolean>();
            personAdapter.notifyDataSetChanged();

        }else{
            Toast.makeText(this,"请选择要删除的行",Toast.LENGTH_SHORT);
        }
    }
    public void updatePerson(View view){
        int position=-1;
        for(int i=0;i<listView.getChildCount();i++){
            View childView=listView.getChildAt(i);
            RadioButton radioButton= (RadioButton) childView.findViewById(R.id.radioButton);
            if(radioButton.isChecked()){
                position=i;
                break;
            }
        }
        if(position!=-1){
            final Person person= persons.get(position);
            AlertDialog.Builder builder= new AlertDialog.Builder(this);
            builder.setTitle("修改用户").create();
            View childView=getLayoutInflater().inflate(R.layout.layout_sqlite_alert,null);
            EditText editViewPerson_name=
                    (EditText) childView.findViewById(R.id.editViewPerson_name);
            EditText editViewPerson_code=
                    (EditText) childView.findViewById(R.id.editViewPerson_code);
            EditText editViewPerson_age=
                    (EditText) childView.findViewById(R.id.editViewPerson_age);
            RadioGroup radioGroupSex=
                    (RadioGroup) childView.findViewById(R.id.radioGroupSex);
            editViewPerson_name.setText(person.getName());
            editViewPerson_age.setText(String.valueOf(person.getAge()));
            editViewPerson_code.setText(person.getCode());
            if(person.getSex().equals("男")){
                ((RadioButton)radioGroupSex.getChildAt(0)).setChecked(true);
            }else{
                ((RadioButton)radioGroupSex.getChildAt(1)).setChecked(true);
            }
            builder.setView(childView);
            builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {

                }
            });
            builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {

                    try {
                        Field field = dialogInterface.getClass().getSuperclass().getDeclaredField("mShowing");
                        field.setAccessible(true);
                        field.set(dialogInterface,false);
                        AlertDialog ad;
                        if(dialogInterface instanceof AlertDialog){
                            ad= (AlertDialog) dialogInterface;
                            EditText editViewPerson_name=
                                    (EditText) ad.findViewById(R.id.editViewPerson_name);
                            EditText editViewPerson_age=
                                    (EditText) ad.findViewById(R.id.editViewPerson_age);
                            EditText editViewPerson_code=
                                    (EditText) ad.findViewById(R.id.editViewPerson_code);
                            RadioGroup radioGroupSex= (RadioGroup) ad.findViewById(R.id.radioGroupSex);

                            if(TextUtils.isEmpty(editViewPerson_name.getText().toString())){
                                Toast.makeText(TestSQLSqlLiteActivity.this,
                                        "姓名不能为空",Toast.LENGTH_SHORT).show();
                                return;
                            }
                            if(TextUtils.isEmpty(editViewPerson_age.getText().toString())){
                                Toast.makeText(TestSQLSqlLiteActivity.this,
                                        "年龄不能为空",Toast.LENGTH_SHORT).show();
                                return;
                            }

                            person.setAge(Integer.parseInt(editViewPerson_age.getText().toString()));
                            person.setName(editViewPerson_name.getText().toString());
                            RadioButton radioButton= (RadioButton) radioGroupSex.
                                    findViewById(radioGroupSex.getCheckedRadioButtonId());
                            person.setSex(radioButton.getText().toString());
                            person.setCode(editViewPerson_code.getText().toString());
                            personDao.updatePerson(person);
                            persons=personDao.getAllPerson();
                            radioStates=new HashMap<String,Boolean>();
                            personAdapter.notifyDataSetChanged();
                            field.set(dialogInterface,true);
                        }

                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            });
            builder.show();

        }else{
            Toast.makeText(this,"请选择要删除的行",Toast.LENGTH_SHORT);
        }
    }

}

 布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="addPerson"
            android:text="新增" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="deletePerson"
            android:text="删除" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="updatePerson"
            android:text="修改" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:text="姓名" />

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:text="编号" />

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:text="年龄" />

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:text="性别" />

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center_horizontal"
            android:text="请选择" />
    </LinearLayout>

    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

 

如果想要源码，请留下邮箱。

Demo下载
最后，以上例子都来源与安卓无忧，请去应用宝或者豌豆荚下载：http://android.myapp.com/myapp/detail.htm?apkName=com.shandong.mm.androidstudy，源码例子文档一网打尽。 

 

 

  • sqlite 增删改查 博客分类： 数据存储 sqlliteSQLiteOpenHelpersqllite增删改查android数据库
  • 大小: 6.4 MB
相关标签： sqllite SQLiteOpenHelper sqllite增删改查 android数据库

上一篇： python绘制立方体的方法

下一篇： 数独科技创始人黄俊达：未来跨境电商给企业带来的严峻形势

推荐阅读