package com.example.contentprovider;

import android.app.Activity;
import android.content.ContentResolver;
import android.database.Cursor;
import android.graphics.Color;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract.Contacts;
import android.widget.TextView;

public class CPActivity extends Activity {

 Uri contact_uri = Contacts.CONTENT_URI;//聯(lián)系人的URI

 //聲明TextView的對象
 TextView textview;

 //定義文本顏色
 int textcolor = Color.BLACK;

 @Override
 protected void onCreate(Bundle savedInstanceState) {

 super.onCreate(savedInstanceState);

 //根據(jù)main.xml設置程序UI
 setContentView(R.layout.activity_cp);

 textview = (TextView)findViewById(R.id.textview);

 //調(diào)用getContactInfo()方法獲取聯(lián)系人信息
 String result = getContactInfo();

 //設置文本框的顏色
 textview.setTextColor(textcolor);

 //定義字體大小
 textview.setTextSize(20.0f);

 //設置文本框的文本
 textview.setText("記錄\t 名字\n"+result); 
 }

 //getContactInfo()獲取聯(lián)系人列表的信息，返回String對象
 public String getContactInfo() {
 // TODO Auto-generated method stub
 String result = "";
 ContentResolver resolver = getContentResolver();
 Cursor cursor = resolver.query(contact_uri, null, null, null, null);

 //獲取_ID字段索引
 int idIndex = cursor.getColumnIndex(Contacts._ID);

 //獲取name字段的索引
 int nameIndex = cursor.getColumnIndex(Contacts.DISPLAY_NAME);

 //遍歷Cursor提取數(shù)據(jù)
 cursor.moveToFirst();
 for(;!cursor.isAfterLast();cursor.moveToNext()){
 result = result+cursor.getString(idIndex)+"\t\t\t";
 result = result+cursor.getString(nameIndex)+"\t\n";
 }

 //使用close方法關(guān)閉游標
 cursor.close();

 //返回結(jié)果
 return result;
 }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context="${relativePackage}.${activityClass}" >

 <TextView
 android:id="@+id/textview"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"/>

</LinearLayout>

<uses-permission 
 android:name="android.permission.READ_CONTACTS" />