【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