实验8 SQLite数据库操作

实验报告

课程名称

基于Android平台移动互联网开发

实验日期

2016年5月6日

实验项目名称

SQLite数据库操作

实验地点

S30010

实验类型

□验证型    √设计型    □综合型

学  时

一、实验目的及要求(本实验所涉及并要求掌握的知识点)

  1. 设计一个个人通讯录,掌握Android平台下的数据库开发,该个人通讯录主要包括联系人列表和联系人详细信息等界面。
  2. 程序主界面是通讯录的目录显示手机上联系人的名称。点击联系人的姓名可以显示联系人的详细信息。单击图标按钮可以添加联系人和删除联系人。

二、实验环境(本实验所使用的硬件设备和相关软件)

(1)PC机

(2)操作系统:Windows XP

(3)软件: Eclipse, JDK1.6,Android SDK,ADT

三、实验内容及步骤

(1)  确定数据库的数据结构。

(2)  新建工程,修改布局文件,定义字符串资源。

(3)  开发布局文件activity_main.xml用于显示联系人列表。

(4)  layout目录下新建一个detail.xml,用于显示联系人详细信息。

(5)  开发数据库辅助类MyOpenHelper类

(6)  DetailActivity端开发实现数据库增加、删除、修改记录等操作

(7)  新建Activity名为DetailActivity.java,实现联系人详细信息显示功能。

四、实验结果(本实验源程序清单及运行结果或实验结论、实验设计图)

代码:

detail.xml

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

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.00"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/tname"
            android:layout_width="77dp"
            android:layout_height="wrap_content"
            android:text="   姓名:   "
            android:textSize="18dp"
            />

        <EditText
            android:id="@+id/ename"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:inputType="textPersonName" >

            <requestFocus />
        </EditText>

    </LinearLayout>

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

        <TextView
            android:id="@+id/tguhua"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="固定电话:"
            android:textSize="18dp" />

        <EditText
            android:id="@+id/eguhua"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:inputType="phone" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.00"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/tshouji"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="0.00"
            android:text="移动电话:" 
            android:textSize="18dp"/>

        <EditText
            android:id="@+id/eshouji"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="0.00"
            android:ems="10"
            android:inputType="phone" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.00"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/temail"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="电子邮件:" 
            android:textSize="18dp"/>

        <EditText
            android:id="@+id/eemail"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:inputType="textEmailAddress" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.00"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/tpost"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="邮政编码:"
            android:textSize="18dp" />

        <EditText
            android:id="@+id/epost"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:inputType="number" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.00"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/tadress"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="通讯地址:" 
            android:textSize="18dp"/>

        <EditText
            android:id="@+id/eadress"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:inputType="textPostalAddress" />

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.00"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/tgongsi"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="公司名称:" 
            android:textSize="18dp"/>

        <EditText
            android:id="@+id/egongsi"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10" />

    </LinearLayout>

    <Button
        android:id="@+id/btnsave"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="保存" />

</LinearLayout>

Myopenhelper.java

package com.example.contacts;

import android.R.string;
import android.app.Activity;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class Myopenhelper extends SQLiteOpenHelper{
    
    public static final String DB_NAME="personal_contacts"; //数据库文件名
    public static final String TABLE_NAME="contacts";        //表名
    public static final String ID="id";                      //ID
    public static final String NAME="name";                  //名称
    public static final String PHONE="phone";                //固话
    public static final String MOBTLE="mobile";               //手机
    public static final String EMAIL="email";                 //email
    public static final String POST="post";                   //邮编
    public static final String ADD="address";               //地址
    public static final String GONGSI="gongsi";             //公司

    public Myopenhelper(Context context, String name, CursorFactory factory,
            int version) {
        super(context, name, factory, version);
        
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("creat table id no exists"+TABLE_NAME+"("
                +ID+"integer primary key,"
                +NAME+"varchar,"
                +PHONE+"varchar,"
                +MOBTLE+"varchar,"
                +EMAIL+"varchar,"
                +POST+"varchar,"
                +ADD+"varchar,"
                +GONGSI+"varchar)");
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int arg1, int arg2) {
        db.execSQL("if exists"+TABLE_NAME);
        onCreate(db);
        Log.e("Datsbase", "onUpgrade");
    }

}

DetailActivity.java

package com.example.contacts;

import android.app.Activity;
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class DetailActivity extends Activity {
    EditText ename, eguhua, eshouji, eemail, epost, eadress, egongsi;
    String name, guhua, shouji, email, post, adress, gongsi;
    Button btnsave;
    
    SQLiteDatabase userdatabase;
    Bundle bd;
    String selectname;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.detail);
        btnsave = (Button) findViewById(R.id.btnsave);
        ename = (EditText) findViewById(R.id.ename);
        eguhua = (EditText) findViewById(R.id.eguhua);
        eshouji = (EditText) findViewById(R.id.eshouji);
        eemail = (EditText) findViewById(R.id.eemail);
        epost = (EditText) findViewById(R.id.epost);
        eadress = (EditText) findViewById(R.id.eadress);
        egongsi = (EditText) findViewById(R.id.egongsi);
      
        bd = getIntent().getExtras();
        if (!bd.getString("name").equals("")) {
            selectname = bd.getString("name");
            Cursor cursor = userdatabase.rawQuery(
                    "select * from userTable where name=?",
                    new String[] { selectname });
            cursor.moveToFirst();
            ename.setText(cursor.getString(cursor.getColumnIndex("name")));
            eguhua.setText(cursor.getString(cursor.getColumnIndex("guhua")));
            eshouji.setText(cursor.getString(cursor.getColumnIndex("shouji")));
            eemail.setText(cursor.getString(cursor.getColumnIndex("email")));
            epost.setText(cursor.getString(cursor.getColumnIndex("post")));
            eadress.setText(cursor.getString(cursor.getColumnIndex("adress")));
            egongsi.setText(cursor.getString(cursor.getColumnIndex("gongsi")));
            btnsave.setText("保存");
        }
        btnsave.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                name = ename.getText().toString();
                guhua = eguhua.getText().toString();
                shouji = eshouji.getText().toString();
                email = eemail.getText().toString();
                post = epost.getText().toString();
                adress = eadress.getText().toString();
                gongsi = egongsi.getText().toString();

                if (!name.equals("") && !guhua.equals("") && !shouji.equals("")
                        && !email.equals("") && !post.equals("")
                        && !adress.equals("") && !gongsi.equals("")) {

                    Cursor cursor = userdatabase.rawQuery(
                            "select * from userTable where name=?",
                            new String[] { name });
                    cursor.moveToFirst();
                    ContentValues cv = new ContentValues();
                    cv.put("name", name);
                    cv.put("phone", guhua);
                    cv.put("mobile", shouji);
                    cv.put("email", email);
                    cv.put("post", post);
                    cv.put("addr", adress);
                    cv.put("comp", gongsi);
                    if (cursor.getCount() <= 0) {
                        userdatabase.insert("userTable", null, cv);
                        cv.clear();
                        Toast.makeText(DetailActivity.this, "保存" + name + "成功",
                                Toast.LENGTH_LONG).show();
                        userdatabase.delete("userTable", "name=?",
                                new String[] { selectname });

                        Intent it = new Intent();
                        it.setClass(DetailActivity.this, MainActivity.class);
                        startActivity(it);
                        finish();
                    } else if (cursor.getCount() == 1
                            && cursor.getString(cursor.getColumnIndex("name"))
                                    .equals(selectname)) {
                        userdatabase.update("userTable", cv, "name=?",
                                new String[] { selectname });
                        cv.clear();
                        Toast.makeText(DetailActivity.this, "更新" + name + "成功",
                                Toast.LENGTH_LONG).show();
                        Intent it = new Intent();
                        it.setClass(DetailActivity.this, MainActivity.class);
                        startActivity(it);
                        finish();
                    } else {

                        Toast.makeText(DetailActivity.this, name + "已注册",
                                Toast.LENGTH_LONG).show();
                    }
                } else {
                    Toast.makeText(DetailActivity.this, "信息不完整",
                            Toast.LENGTH_LONG).show();
                }
            }

        });
    }
}

MainActivity.java

package com.example.contacts;

import java.util.ArrayList;
import java.util.HashMap;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.widget.SimpleAdapter;

public class MainActivity extends Activity {
    
    private ListView lv;
    private Button addbtn;
    private Button deletebtn;
    

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        
              
                 addbtn=(Button)findViewById(R.id.button1);

                 addbtn.setOnClickListener(new OnClickListener() {

                     public void onClick(View arg0) {

                         Intent intent2=new Intent();

                         intent2.setClass(MainActivity.this, DetailActivity.class);

                         startActivity(intent2);

                         finish();  

                     }

                 });
                 
                 deletebtn=(Button) findViewById(R.id.button2);
                 
                 deletebtn.setOnClickListener(new OnClickListener() {
                    
                    @Override
                    public void onClick(View arg0) {
                        // TODO Auto-generated method stub
//                        db.delete("contacts","name=?",new string[]{s});
                    }
                });

             }

        }
        
    


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    
}

五、实验总结(对本实验结果进行分析,实验心得体会及改进意见)

 这次的实验没有成功。

原文地址:https://www.cnblogs.com/simei-31/p/5488126.html