Android开发-SQLiteDemo增删改查-AndroidStudio

项目下载：http://download.csdn.net/detail/iwanghang/9601862

manifests：

MainActivity：

package com.iwanghang.sqlitedemo;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ListView;
import android.widget.Toast;

import com.iwanghang.sqlitedemo.dialog.DeleteDialog;
import com.iwanghang.sqlitedemo.dialog.InsertDialog;
import com.iwanghang.sqlitedemo.dialog.UpdateDialog;

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

public class MainActivity extends Activity implements View.OnClickListener {
    private SQLiteHelper db;
    private ListAdapter listAdapter;

    /**
     * 插入请求代码
     */
    private static final int INSERT_REQUESTCODE = 1;
    /**
     * 插入结果代码
     */
    private static final int INSERT_RESULTCODE = 1;

    /**
     * 删除请求代码
     */
    private static final int DELETE_REQUESTCODE = 2;
    /**
     * 删除结果代码
     */
    private static final int DELETE_RESULTCODE = 2;

    /**
     * 修改请求代码
     */
    private static final int UPDATE_REQUESTCODE = 3;
    /**
     * 修改结果代码
     */
    private static final int UPDATE_RESULTCODE = 3;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        db = new SQLiteHelper(this, "person.db", null, 1);
        init();
    }

    private void init() {
        findViewById(R.id.btn_insert).setOnClickListener(this);
        findViewById(R.id.btn_delete).setOnClickListener(this);
        findViewById(R.id.btn_update).setOnClickListener(this);
        findViewById(R.id.btn_query).setOnClickListener(this);
        listAdapter = new ListAdapter(new ArrayList(), this);
        findViewById(R.id.list_data, ListView.class).setAdapter(listAdapter);
    }

    private  T findViewById(int id, Class c) {
        return (T) findViewById(id);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btn_insert: // 插入
                insert();
                break;
            case R.id.btn_delete: // 删除
                delete();
                break;
            case R.id.btn_update: // 修改
                update();
                break;
            case R.id.btn_query: // 查询
                query();
                break;
        }
    }

    /**
     * 添加
     */
    private void insert() {
        Intent intent = new Intent(this, InsertDialog.class);
        startActivityForResult(intent, INSERT_REQUESTCODE);
    }

    /**
     * 删除
     */
    private void delete() {
        Intent intent = new Intent(this, DeleteDialog.class);
        startActivityForResult(intent, DELETE_REQUESTCODE);
    }

    /**
     * 更新
     */
    private void update() {
        Intent intent = new Intent(this, UpdateDialog.class);
        startActivityForResult(intent, UPDATE_REQUESTCODE);
    }

    /**
     * 查询
     */
    private void query() {
        List list = db.queryAllPerson(); // 查询所有的Person
        loadData(list); // 加载数据到ListView上面
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case INSERT_REQUESTCODE:
                if (resultCode == INSERT_RESULTCODE) { // 插入请求
                    if (data != null) {
                        db.addPerson((Person) data.getSerializableExtra("person"));
                        showMessage("插入成功!");
                        query();
                    } else {
                        showMessage("取消插入!");
                    }
                }
                break;
            case DELETE_REQUESTCODE:
                if (resultCode == DELETE_RESULTCODE) { // 删除请求
                    if (data != null) {
                        int _id = data.getIntExtra("_id", -1);
                        if (_id != -1) {
                            if (db.queryPersonById(_id) != null) {
                                db.deletePerson(_id);
                                showMessage("删除成功!");
                                query();
                            } else {
                                showMessage("删除失败\t_id:" + _id + "不存在!");
                            }
                        } else {
                            showMessage("删除失败!");
                        }
                    } else {
                        showMessage("取消删除!");
                    }
                }
                break;
            case UPDATE_REQUESTCODE:
                if (resultCode == UPDATE_RESULTCODE) { // 修改请求
                    if (data != null) {
                        Person person = (Person) data
                                .getSerializableExtra("person");
                        int _id = person.get_id();
                        if (db.queryPersonById(person.get_id()) != null) {
                            db.updatePerson(person);
                            showMessage("修改成功!");
                            query();
                        } else {
                            showMessage("修改失败\t_id:" + _id + "不存在!");
                        }
                    } else {
                        showMessage("取消修改!");
                    }
                }
                break;
        }

    }

    /**
     * 显示消息
     *
     * @param msg
     *            消息
     */
    private void showMessage(String msg) {
        Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
    }

    /**
     * 加载数据到ListView
     *
     * @param list
     *            Person集合
     */
    private void loadData(List list) {
        listAdapter.setList(list);
        listAdapter.notifyDataSetChanged(); // 刷新数据
    }
}

Person：

package com.iwanghang.sqlitedemo;

import java.io.Serializable;

/**
 * 人
 */
public class Person implements Serializable {
    /**
     * 序列化的版本号
     */
    private static final long serialVersionUID = 1L;
    /**
     * 组件
     */
    private int _id;
    /**
     * 姓名
     */
    private String name;
    /**
     * 年龄
     */
    private int age;
    /**
     * 性别
     */
    private String sex;
    /**
     * set方法
     * get方法
     */
    public int get_id() {
        return _id;
    }

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

    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

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

    public String getSex() {
        return sex;
    }

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

ListAdapter：

package com.iwanghang.sqlitedemo;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.List;

public class ListAdapter extends BaseAdapter {
    private List list;
    private LayoutInflater inflater;

    public ListAdapter(List list, Context context) {
        this.list = list;
        this.inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    public void setList(List list) {
        this.list = list;
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null)
            convertView = inflater.inflate(R.layout.activity_main_list1, null);
        TextView idView = (TextView) convertView.findViewById(R.id.text_id);
        TextView nameView = (TextView) convertView.findViewById(R.id.text_name);
        TextView ageView = (TextView) convertView.findViewById(R.id.text_age);
        TextView sexView = (TextView) convertView.findViewById(R.id.text_sex);
        Person person = list.get(position);
        idView.setText(String.valueOf(person.get_id()));
        nameView.setText(person.getName());
        ageView.setText(String.valueOf(person.getAge()));
        sexView.setText(String.valueOf(person.getSex()));
        return convertView;
    }

}

SQLiteHelper：

package com.iwanghang.sqlitedemo;

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

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

/**
 * 数据库创建、更新
 */
public class SQLiteHelper extends SQLiteOpenHelper {
    /**
     * @param context
     *            上下文
     * @param name
     *            数据库名称
     * @param factory
     *            游标工厂
     * @param version
     *            数据库版本
     */
    public SQLiteHelper(Context context, String name, SQLiteDatabase.CursorFactory factory,
                        int version) {
        super(context, name, factory, version);
    }

    // 创建数据库
    @Override
    public void onCreate(SQLiteDatabase db) {
        Log.e("SqliteHelper", "数据库创建");
        String sql = "create table person(_id integer Primary Key autoincrement,name varchar(20), age integer,sex varchar(20))";
        db.execSQL(sql);
    }

    // 数据库更新
    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        Log.e("SqliteHelper", "数据库更新");
    }

    /**
     * 添加Person到数据库
     *
     * @param person
     *            Person
     */
    public void addPerson(Person person) {
        Log.e("SqliteHelper", "插入");
        SQLiteDatabase db = getWritableDatabase(); // 以读写的形式打开数据库
//		db.execSQL("insert into person(name,age) values("
//				+ String.format("'%s'", person.getName()) + ","
//				+ person.getAge() + ");"); // 插入数据库

        // insert into person(name,age,sex) values('liudehua',50,'man')
//		db.execSQL(
//				"insert into person(name,age,sex) values("
//				+ String.format("'%s'", person.getName()) + ","
//				+ person.getAge() + ","
//				+ String.format("'%s'", person.getSex()) +
//				");"
//		); // 插入数据库

        db.execSQL(
                "insert into person(name,age,sex) values("
                        + String.format("'%s'", person.getName()) + ","
                        + person.getAge() + ","
                        + String.format("'%s'", person.getSex()) +
                        ");"
        ); // 插入数据库

        db.close(); // 关闭数据库连接
    }

    /**
     * 更新Person
     *
     * @param person
     *            Person
     */
    public void updatePerson(Person person) {
        Log.e("SqliteHelper", "更新");
        SQLiteDatabase db = getWritableDatabase(); // 以读写的形式打开数据库
//		String sql = "update person set name="
//				+ String.format("'%s'", person.getName()) + ",age="
//				+ person.getAge() + " where _id=" + person.get_id();

        String sql = "update person set name="
                + String.format("'%s'", person.getName())
                + ",age=" + person.getAge()
                + ",sex=" + String.format("'%s'", person.getSex())
                + " where _id=" + person.get_id();

        Log.e("updatePerson", sql);
        db.execSQL(sql); // 更新数据库
        db.close(); // 关闭数据库连接
    }

    /**
     * 删除Person
     *
     * @param _id
     *            Person的id
     */
    public void deletePerson(int _id) {
        Log.e("SqliteHelper", "删除");
        SQLiteDatabase db = getWritableDatabase(); // 以读写的形式打开数据库
        String sql = "_id = ?";
        String wheres[] = { String.valueOf(_id) };
        db.delete("person", sql, wheres); // 数据库删除
        db.close(); // 关闭数据库
    }

    /**
     * 查询所有的Person
     *
     * @return 所有Person集合
     */
    public List queryAllPerson() {
        List list = new ArrayList();
        SQLiteDatabase db = getReadableDatabase(); // 以只读的方式打开数据库
        String sql = "select * from person;";
        Cursor cursor = db.rawQuery(sql, null);
        while (cursor.moveToNext()) {
            int _id = cursor.getInt(cursor.getColumnIndex("_id"));
            String name = cursor.getString(cursor.getColumnIndex("name"));
            int age = cursor.getInt(cursor.getColumnIndex("age"));
            String sex = cursor.getString(cursor.getColumnIndex("sex"));
            Person person = new Person();
            person.set_id(_id);
            person.setName(name);
            person.setAge(age);
            person.setSex(sex);
            System.out.println(" ---- sex = " + sex);
            list.add(person); // 添加到数组
        }
        cursor.close(); // 关闭游标
        db.close(); // 关闭数据库
        return list;
    }

    /**
     * 根据id查询Person
     *
     * @param _id
     *            id
     * @return Person
     */
    public Person queryPersonById(int _id) {
        Person person = null;
        SQLiteDatabase db = getReadableDatabase(); // 以只读方式打开数据库
//		String[] columns = { "_id", "name", "age" };
        String[] columns = { "_id", "name", "age", "sex" };
        String selection = "_id=?";
        String[] selectionArgs = { String.valueOf(_id) };
        Cursor cursor = db.query("person", columns, selection, selectionArgs,
                null, null, null);
        if (cursor.moveToNext()) {
            person = new Person();
            person.set_id(cursor.getInt(cursor.getColumnIndex("_id")));
            person.setAge(cursor.getInt(cursor.getColumnIndex("age")));
            person.setName(cursor.getString(cursor.getColumnIndex("name")));
            person.setName(cursor.getString(cursor.getColumnIndex("sex")));
        }
        return person;
    }
}

InsertDialog：

package com.iwanghang.sqlitedemo.dialog;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.EditText;

import com.iwanghang.sqlitedemo.Person;
import com.iwanghang.sqlitedemo.R;

/**
 * 插入对话框
 */
public class InsertDialog extends Activity implements View.OnClickListener {
    /**
     * 插入请求代码 大于0
     */
    private static final int INSERT_REQUESTCODE = 1;
    /**
     * 姓名控件
     */
    private EditText nameView;
    /**
     * 年龄控件
     */
    private EditText ageView;
    /**
     * 性别控件
     */
    private EditText sexView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);	//去掉标题栏
        setContentView(R.layout.insert_dialog);
        init();
    }

    private void init() {
        findViewById(R.id.insert_confirm).setOnClickListener(this);
        findViewById(R.id.insert_cancel).setOnClickListener(this);
        nameView = (EditText) findViewById(R.id.insert_edit_name);
        ageView = (EditText) findViewById(R.id.insert_edit_age);
        sexView = (EditText) findViewById(R.id.insert_edit_sex);
    }

    @Override
    public void onClick(View v) {
        int id = v.getId();
        switch (id) {
            case R.id.insert_confirm:
                confirm(); // 确认插入
                break;
            case R.id.insert_cancel:
                cancel(); // 取消插入
                break;
        }
    }

    /**
     * 确认插入
     */
    private void confirm() {
        String name = String.valueOf(nameView.getText());
        int age = Integer.valueOf(String.valueOf(ageView.getText()));
        String sex = String.valueOf(sexView.getText());
        Person person = new Person();
        person.setName(name);
        person.setAge(age);
        person.setSex(sex);
        Intent intent = new Intent();
        intent.putExtra("person", person);
        setResult(INSERT_REQUESTCODE, intent);
        finish();
    }

    /**
     * 取消插入
     */
    private void cancel() {
        setResult(INSERT_REQUESTCODE);
        finish();
    }
}

UpdateDialog：

package com.iwanghang.sqlitedemo.dialog;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.EditText;

import com.iwanghang.sqlitedemo.Person;
import com.iwanghang.sqlitedemo.R;

/**
 * 修改对话框
 */
public class UpdateDialog extends Activity implements View.OnClickListener {
    /**
     * 修改请求代码
     */
    private static final int UPDATE_REQUESTCODE = 3;

    /**
     * id控件
     */
    private EditText idView;
    /**
     * 姓名控件
     */
    private EditText nameView;
    /**
     * 年龄控件
     */
    private EditText ageView;
    /**
     * 性别控件
     */
    private EditText sexView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);	//去掉标题栏
        setContentView(R.layout.update_dialog);
        init();
    }

    private void init() {
        findViewById(R.id.update_confirm).setOnClickListener(this);
        findViewById(R.id.update_cancel).setOnClickListener(this);
        idView = (EditText) findViewById(R.id.update_edit_id);
        nameView = (EditText) findViewById(R.id.update_edit_name);
        ageView = (EditText) findViewById(R.id.update_edit_age);
        sexView = (EditText) findViewById(R.id.update_edit_sex);
    }

    @Override
    public void onClick(View v) {
        int id = v.getId();
        switch (id) {
            case R.id.update_confirm:
                confirm(); // 确认修改
                break;
            case R.id.update_cancel:
                cancel(); // 取消修改
                break;
        }
    }

    /**
     * 确认修改
     */
    private void confirm() {
        int _id = Integer.valueOf(String.valueOf(idView.getText()));
        String name = String.valueOf(nameView.getText());
        int age = Integer.valueOf(String.valueOf(ageView.getText()));
        String sex = String.valueOf(sexView.getText());
        Person person = new Person();
        person.set_id(_id);
        person.setAge(age);
        person.setName(name);
        person.setSex(sex);
        Intent intent = new Intent();
        intent.putExtra("person", person);
        setResult(UPDATE_REQUESTCODE, intent);
        finish();
    }

    /**
     * 取消修改
     */
    private void cancel() {
        setResult(UPDATE_REQUESTCODE);
        finish();
    }
}

DeleteDialog：

package com.iwanghang.sqlitedemo.dialog;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.EditText;

import com.iwanghang.sqlitedemo.R;

/**
 * 删除对话框
 */
public class DeleteDialog extends Activity implements View.OnClickListener {
    /**
     * 插入请求代码
     */
    private static final int DELETE_REQUESTCODE = 2;
    /**
     * id控件
     */
    private EditText idView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);	//去掉标题栏
        setContentView(R.layout.delete_dialog);
        init();
    }

    private void init() {
        findViewById(R.id.delete_confirm).setOnClickListener(this);
        findViewById(R.id.delete_cancel).setOnClickListener(this);
        idView = (EditText) findViewById(R.id.delete_edit_id);
    }

    @Override
    public void onClick(View v) {
        int id = v.getId();
        switch (id) {
            case R.id.delete_confirm:
                confirm(); // 确认删除
                break;
            case R.id.delete_cancel:
                cancel(); // 取消删除
                break;
        }
    }

    /**
     * 确认删除
     */
    private void confirm() {
        int _id = Integer.valueOf(String.valueOf(idView.getText()));
        Intent intent = new Intent();
        intent.putExtra("_id", _id);
        setResult(DELETE_REQUESTCODE, intent);
        finish();
    }

    /**
     * 取消删除
     */
    private void cancel() {
        setResult(DELETE_REQUESTCODE);
        finish();
    }
}

activity_main.xml

activity_main_list1.xml:

insert_dialog.xml:

update_dialog.xml:

delete_dialog.xml:

strings.xml:

    Android_SQLite_Demo
    Settings
    插入
    删除
    修改
    查询
    姓名
    年龄
    性别
    确认插入
    取消插入
    ID
    确定删除
    取消删除
    ID
    姓名
    年龄
    性别
    确认更新
    取消更新