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 Listlists = new ArrayList ();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
<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 Listlists;private Context context;//承接上下文public MyAdapter(List lists,Context context){this.lists = lists;this.context = context;}//返回集合的数量 @Overridepublic int getCount() {return lists.size();}//返回当前数据 @Overridepublic Object getItem(int position) {return lists.get(position);}//获取当前ID @Overridepublic long getItemId(int position) {return position;}//返回当前视图 @Overridepublic 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;@Overrideprotected 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
