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   是一个读取通讯录联系人姓名和电话的实例，但由于API 2.0中，每个联系人可以有多个电话（例如手机、住宅、公司、传真等）.

java代码：
import android.app.Activity;

import android.content.ContentResolver;

import android.database.Cursor;

import android.os.Bundle;

import android.provider.ContactsContract;

import android.provider.ContactsContract.PhoneLookup;

import android.widget.TextView;

public class Activity01 extends Activity {

public void onCreate(Bundle savedInstanceState) {

TextView tv = new TextView(this);

String string = "";

super.onCreate(savedInstanceState);

//得到ContentResolver对象

ContentResolver cr = getContentResolver();

//取得电话本中开始一项的光标

Cursor cursor = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);

//向下移动一下光标

while(cursor.moveToNext()) {

//取得联系人名字

int nameFieldColumnIndex = cursor.getColumnIndex(PhoneLookup.DISPLAY_NAME);

String contact = cursor.getString(nameFieldColumnIndex);

//取得电话号码

int numberFieldColumnIndex = cursor.getColumnIndex(PhoneLookup.NUMBER);

//此行会报错，返回值=-1

String number = cursor.getString(numberFieldColumnIndex);

string += (contact+":"+number+"\n");

}

cursor.close();

//设置TextView显示的内容

tv.setText(string);

//显示到屏幕

setContentView(tv);

}

}
复制代码java代码：
import android.app.Activity;

import android.os.Bundle;

import android.provider.ContactsContract;

import android.provider.ContactsContract.PhoneLookup;

import android.database.Cursor;

import android.widget.TextView;

import android.content.ContentResolver;



public class Activity01 extends Activity {

public void onCreate(Bundle savedInstanceState) {

TextView tv = new TextView(this);

String string = "";

super.onCreate(savedInstanceState);

//得到ContentResolver对象

ContentResolver cr = getContentResolver();

//取得电话本中开始一项的光标

Cursor cursor = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);

//向下移动光标

while(cursor.moveToNext()) {

//取得联系人名字

int nameFieldColumnIndex = cursor.getColumnIndex(PhoneLookup.DISPLAY_NAME);

String contact = cursor.getString(nameFieldColumnIndex);

//取得电话号码

String ContactId = cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts._ID)); Cursor phone = cr.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID + "=" + ContactId, null, null);

while(phone.moveToNext()) {

String PhoneNumber = phone.getString(phone.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

string += (contact + ":" + PhoneNumber + "\n");

}

}

cursor.close();

//设置TextView显示的内容

tv.setText(string);

//显示到屏幕

setContentView(tv);

}



}
复制代码