【Android Demo】简单手机通讯录

Android 系统给我们提供了访问通讯录的接口，通过接口获取通讯录信息。Adapter 与 View 的连接主要依靠 getView 这个方法返回我们需要的自定义 view。 ListView 是 Android App 中一个最最最常用的控件了，所以如何让 ListView 流畅运行，获取良好的用户体验是非常重要的。 对 ListView 优化就是对 Adapter 中的 getView 方法进行优化。

 

核心内容：

1.获取手机通讯录

2.数据封装

3.创建 Adapter 

4.优化适配器

 

开发环境：Eclipse

 

效果图：

 

步骤：

1.新建项目，新建 GetNumber.class 类，用来获取通讯录中的信息

package com.yanis.getmyphonenumber;



import java.util.ArrayList;

import java.util.List;



import android.content.Context;

import android.database.Cursor;

import android.provider.ContactsContract.CommonDataKinds.Phone;



public class GetNumber {

    public static List<PhoneInfo> lists = new ArrayList<PhoneInfo>();

    public static String getNumber(Context context) {

        Cursor cursor = context.getContentResolver().query(Phone.CONTENT_URI,

                null, null, null, null);

        String phoneNumber;

        String phoneName;

        while (cursor.moveToNext()) {

            phoneNumber = cursor.getString(cursor.getColumnIndex(Phone.NUMBER));//电话号码

            phoneName = cursor.getString(cursor.getColumnIndex(Phone.DISPLAY_NAME));//姓名

            PhoneInfo  info = new PhoneInfo(phoneName, phoneNumber);

            lists.add(info);

            System.out.println(phoneName+phoneNumber);

        }

        return null;

    }

}

2.添加权限

   <!-- 读取联系人权限 -->  

<uses-permission android:name="android.permission.READ_CONTACTS"/>

3.新建 PhoneInfo.class 类作为通讯录信息封装类

package com.yanis.getmyphonenumber;



/**

 * 

 * @author yechao

 * @说明 通讯录信息封装类

 */

public class PhoneInfo {

    private String phoneName;

    private String phoneNumber;



    public PhoneInfo(String phoneName, String phoneNumber) {

        setPhoneName(phoneName);

        setPhoneNumber(phoneNumber);

    }



    public String getPhoneName() {

        return phoneName;

    }



    public void setPhoneName(String phoneName) {

        this.phoneName = phoneName;

    }



    public String getPhoneNumber() {

        return phoneNumber;

    }



    public void setPhoneNumber(String phoneNumber) {

        this.phoneNumber = phoneNumber;

    }



}

4.自定义 ListView 的适配器类 MyAdapter.class 

package com.yanis.getmyphonenumber;



import java.util.List;



import android.content.Context;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.LinearLayout;

import android.widget.TextView;



public class MyAdapter extends BaseAdapter {



    private List<PhoneInfo> lists;

    private Context context;//承接上下文

    

    public MyAdapter(List<PhoneInfo> lists,Context context)

    {

        this.lists = lists;

        this.context = context;

    }

    

    //返回集合的数量

    @Override

    public int getCount() {

        return lists.size();

    }



    //返回当前数据

    @Override

    public Object getItem(int position) {

        return lists.get(position);

    }



    //获取当前ID

    @Override

    public long getItemId(int position) {

        return position;

    }



    //返回当前视图 

    @Override

    public View getView(int position, View convertView, ViewGroup parent) {

        ViewHolder holder ;

        if(convertView==null)

        {

            convertView = LayoutInflater.from(context).inflate(R.layout.call,null);

            holder = new ViewHolder();

            holder.tvName =  (TextView)convertView.findViewById(R.id.tv_Name);

            holder.tvNumber =  (TextView)convertView.findViewById(R.id.tv_Number);

            convertView.setTag(holder);

        }else {

            holder = (ViewHolder)convertView.getTag();

        }

        holder.tvName.setText(lists.get(position).getPhoneName());

        holder.tvNumber.setText(lists.get(position).getPhoneNumber());

        return convertView;

    }

    

    private static class ViewHolder{

        TextView tvName;

        TextView tvNumber;

    }



}

5.最后就是主界面代码，至于布局太简单就不列出来了，有兴趣的童鞋可以查看源代码

package com.yanis.getmyphonenumber;



import android.app.Activity;

import android.os.Bundle;

import android.widget.ListView;



public class MainActivity extends Activity {

    private ListView listView;

    private MyAdapter adapter;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);



        GetNumber.getNumber(this);



        initView();

    }



    private void initView() {

        listView =(ListView) findViewById(R.id.listView);

        adapter = new MyAdapter(GetNumber.lists, this);

        listView.setAdapter(adapter);

    }

}

 

 

源代码地址：https://github.com/YeXiaoChao/Yc_demo_getMyPhoneNumber

本文地址：http://www.cnblogs.com/yc-755909659/p/4312221.html