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。在按了MEMU键之后会弹出菜单栏。单击菜单栏上的按钮可以添加联系人和删除联系人。

(2)操作系统：Windows XP

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

2. 在res/drawable-mdpi目录下拷入程序要用的图标

3. 定义字符串资源string.xml

4. 开发布局文件activity_main.xml用于显示联系人列表。

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

6. 开发数据库辅助类MyOpenHelper类，新建一个MyOpenHelper.java。

7. 接下来便进入MainActivity端的开发，实现数据库增加、删除、修改记录等操作

8. 新建一个Activity名字叫DetailActivity.java，实现联系人详细信息显示功能。

MainActivity.java中：

package com.example.personaladdr;

import java.security.PublicKey;

import java.util.List;

import android.app.Activity;

import android.app.AlertDialog;

import android.content.DialogInterface;

import android.content.Intent;

import android.database.Cursor;

import android.os.Bundle;

import android.view.Menu;

import android.view.View;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.ListView;

public class MainActivity extends Activity {

private MyOpenHelper db;

private ListView lView;

private Cursor cursor;

final int MENU_ADD=Menu.FIRST;

final int MENU_CHANGE=Menu.FIRST+1;

private List<String>ids;

private List<String>names;

private List<String>phones;

AlertDialog dialog;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

//db=new MyOpenHelper(context, name, null, 1);

//db=new MyOpenHelper(this);

lView=(ListView)findViewById(R.id.db_listview);

lView.setOnItemClickListener(new OnItemClickListener() {

@Override

public void onItemClick(AdapterView<?> arg0, View arg1, int position,

long arg3) {

// TODO Auto-generated method stub

Intent intent=new Intent();

intent.putExtra("cmd", 0);

//0代表查询联系人，1代表添加联系人

String contants_id=ids.get(position);

intent.putExtra("id", contants_id);

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

startActivity(intent);

}

});

lView.setOnItemClickListener(new OnItemClickListener() {

@Override

public void onItemClick(AdapterView<?> arg0, View arg1, final int position,

long arg3) {

// TODO Auto-generated method stub

}

});

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

return super.onCreateOptionsMenu(menu);

}

}

MyOpenHelper.java中：

package com.example.personaladdr;

import android.R.integer;

import android.R.string;

import android.content.ContentValues;

import android.content.Context;

import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;

import android.database.sqlite.SQLiteDatabase.CursorFactory;

import android.database.sqlite.SQLiteOpenHelper;

public class MyOpenHelper extends SQLiteOpenHelper{

public static final String DB_NAME="personal_contacts";

public static final String TABLE_NAME="contacts";

public static final String ID="_id";

public static final String NAME="name";

public static final String PHONE="phone";

public static final String MOBILE="mobile";

public static final String EMAIL="email";

public static final String POST="post";

public static final String ADDR="addr";

public static final String COMP="comp";

public MyOpenHelper(Context context, String name, CursorFactory factory,

int version) {

super(context, DB_NAME, null, 1);//调用父类构造器

// TODO Auto-generated constructor stub

}

@Override

public void onCreate(SQLiteDatabase db) {//重写onCreate方法

// TODO Auto-generated method stub

db.execSQL("create table if not exists"+TABLE_NAME+"("

+ID+"integer primary key,"

+NAME+"varchar,"

+PHONE+"varchar,"

+MOBILE+"varchar,"

+EMAIL+"varchar,"

+POST+"varchar,"

+ADDR+"varchar,"

+COMP+"varchar)");

}

@Override

public void onUpgrade(SQLiteDatabase db, int arg1, int arg2) {//重写onUpgrade方法

// TODO Auto-generated method stub

db.execSQL("drop table if exists"+TABLE_NAME);

onCreate(db);

}

public Cursor selectContants(){

SQLiteDatabase db=this.getReadableDatabase();

Cursor cursor=db.query(TABLE_NAME, null, null, null, null, null, null);

return cursor;

}

public long insertContants(String[] strArray){

SQLiteDatabase db=this.getWritableDatabase();

ContentValues cv=new ContentValues();

cv.put(NAME, strArray[0]);

cv.put(PHONE, strArray[1]);

cv.put(MOBILE, strArray[2]);

cv.put(EMAIL, strArray[3]);

cv.put(POST, strArray[4]);

cv.put(ADDR, strArray[5]);

cv.put(COMP, strArray[6]);

return db.insert(TABLE_NAME, null, cv);

}

public void deleteContants(String id){

SQLiteDatabase db=this.getWritableDatabase();

String where=ID+"=?";

String[] whereValues={id};

db.delete(TABLE_NAME, where, whereValues);

}

public int updateContants(String id,String[] strArray){

SQLiteDatabase db=this.getWritableDatabase();

String where=ID+"=?";

String[] whereValues={id};

ContentValues cv=new ContentValues();

cv.put(NAME, strArray[0]);

cv.put(PHONE, strArray[1]);

cv.put(MOBILE, strArray[2]);

cv.put(EMAIL, strArray[3]);

cv.put(POST, strArray[4]);

cv.put(ADDR, strArray[5]);

cv.put(COMP, strArray[6]);

return db.update(TABLE_NAME, cv, where, whereValues);

}

public Cursor getContants(String id){

SQLiteDatabase db=this.getReadableDatabase();

String where=ID+"=?";

String[] whereValues={id};

Cursor cursor=db.query(TABLE_NAME, null, where, whereValues, null, null, null);

return cursor;

}

}

DetailActivity.java中：

package com.example.personaladdr;

import android.app.Activity;

import android.content.Context;

import android.content.Intent;

import android.database.Cursor;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.EditText;

import android.widget.ImageButton;

import android.widget.Toast;

public class DetailActivity extends Activity{

Cursor cursor;

MyOpenHelper db;

int id=-1;

int i;

int [] textIds={

R.id.etName,R.id.etPhone,R.id.etMobile,R.id.etEmail,R.id.etPhone,R.id.etAddr,R.id.etComp

};

EditText [] textArray;

ImageButton saveButton;

//0表示查看信息，1表示添加联系人，2表示修改联系人

int status=-1;

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.detail);

final ImageButton saveBtn=(ImageButton)findViewById(R.id.ibSave);

textArray=new EditText[textIds.length];

for(int i=0;i<textIds.length;i++){

textArray[i]=(EditText)findViewById(textIds[i]);

}

Intent intent=getIntent();

status=intent.getExtras().getInt("cmd");

switch(status){

case 0:

String contants_id=intent.getExtras().getString("id");

cursor=db.getContants(contants_id);

int count=cursor.getCount();

if(count==0){

Toast.makeText(this, "对不起，没有找到指定的联系人！", Toast.LENGTH_LONG).show();

}else {

cursor.moveToFirst();

textArray[0].setText(cursor.getString(1));

textArray[1].setText(cursor.getString(2));

textArray[2].setText(cursor.getString(3));

textArray[3].setText(cursor.getString(4));

textArray[4].setText(cursor.getString(5));

textArray[5].setText(cursor.getString(6));

textArray[6].setText(cursor.getString(7));

}

cursor.close();

db.close();

break;

case 1:

for(EditText et:textArray){

et.getEditableText().clear();

}

break;

}

saveBtn.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

String [] strArray=new String[textArray.length];

for(int i=0;i<strArray.length;i++){

strArray[i]=textArray[i].getText().toString().trim();

}

if(strArray[0].equals("")||strArray[1].equals("")){

Toast.makeText(DetailActivity.this, "对不起，您填写的姓名或电话不完整！", Toast.LENGTH_LONG).show();

}else {

switch(status){

case 0:

updateContact(strArray);

break;

case 1:

insertContant(strArray);

break;

}

}

}

});

}

public void insertContant(String [] strArray){

long count = db.insertContants(strArray);

db.close();

if(count == -1){

Toast.makeText(this, "添加联系人失败！", Toast.LENGTH_LONG).show();

}

else{

Toast.makeText(this, "添加联系人成功！", Toast.LENGTH_LONG).show();

}

}

public void updateContact(String [] strArray){

int count = db.updateContants(id+"", strArray);    //更新数据库

db.close();

if(count == 1){

Toast.makeText(this, "修改联系人成功！", Toast.LENGTH_LONG).show();

}

else{

Toast.makeText(this, "修改联系人失败！", Toast.LENGTH_LONG).show();

}

}

}

运行结果：（截图）