【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