import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.Contacts;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AutoCompleteTextView;
import android.widget.TextView;
@SuppressWarnings("deprecation")
public class A07Activity extends Activity {
 private AutoCompleteTextView actv;
 private TextView tv;
 private Cursor c01;
 private ContactsAdapter ca;
 //找出通讯录中的字段
 public static String[] people={
  Contacts.People._ID,
  Contacts.People.PRIMARY_PHONE_ID,
  Contacts.People.TYPE,
  Contacts.People.NUMBER,
  Contacts.People.LABEL,
  Contacts.People.NAME
     }; 
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    actv=(AutoCompleteTextView)findViewById(R.id.actv);
    tv=(TextView)findViewById(R.id.tv);
    ContentResolver cr=getContentResolver();
    c01=cr.query(Contacts.People.CONTENT_URI, people, null, null, Contacts.People.DEFAULT_SORT_ORDER);
    ca=new ContactsAdapter(this,c01);
    actv.setAdapter(ca);
    actv.setOnItemClickListener(new OnItemClickListener(){
  @Override
  public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
   long arg3) {
  // TODO Auto-generated method stub
  Cursor c02=ca.getCursor();
  c02.moveToPosition(arg2);
  String number=c02.getString(c02.getColumnIndexOrThrow(Contacts.People.NUMBER));
  number=number==null?"无电话输入": number;
  tv.setText(c02.getString(c02.getColumnIndexOrThrow(Contacts.People.NAME))+"的电话是："+number);
  }
    });
  }
}

import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.provider.Contacts;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CursorAdapter;
import android.widget.TextView;
@SuppressWarnings("deprecation")
public class ContactsAdapter extends CursorAdapter{
 ContentResolver cr;
 public ContactsAdapter(Context context, Cursor c) {
 super(context, c);
 // TODO Auto-generated constructor stub
 cr=context.getContentResolver();
 }
 @Override
 public void bindView(View view, Context context, Cursor cursor) {
 // TODO Auto-generated method stub
 ((TextView)view).setText(cursor.getString(cursor.getColumnIndexOrThrow(Contacts.People.NAME)));
 }
 @Override
 public View newView(Context context, Cursor cursor, ViewGroup parent) {
 // TODO Auto-generated method stub
 final LayoutInflater li=LayoutInflater.from(context);
 final TextView tv=(TextView)li.inflate(android.R.layout.simple_dropdown_item_1line, parent, false);
 tv.setText(cursor.getString(cursor.getColumnIndexOrThrow(Contacts.People.NAME)));
 return tv;
 }
 public String converToString(Cursor c){
 return c.getString(c.getColumnIndexOrThrow(Contacts.People.NAME));
 }
 @SuppressWarnings("null")
 public Cursor runQueryOnBackgroundThread(CharSequence cs){
 if(getFilterQueryProvider()!=null){
  getFilterQueryProvider().runQuery(cs);
 }
 StringBuilder sb=null;
 String[] s=null;
 if(cs==null){
  sb=new StringBuilder();
  sb.append("UPPER(");
  sb.append(Contacts.ContactMethods.NAME);
  sb.append(")GLOB?");
   s=new String[]{cs.toString().toUpperCase()+"*"};
 }
 return cr.query(
    Contacts.People.CONTENT_URI,
    A07Activity.people, 
    sb==null? null:sb.toString(),
     s, 
     Contacts.People.DEFAULT_SORT_ORDER
     );
 }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.my.a07"
  android:versionCode="1"
  android:versionName="1.0" >
  <uses-sdk android:minSdkVersion="10" />
  <application
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name" >
    <activity
      android:name=".A07Activity"
      android:label="@string/app_name" >
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>
  </application>
  <uses-permission android:name="android.permission.READ_CONTACTS"></uses-permission>
</manifest>