Android 利用ContentProvider获取联系人信息

package com.example.administrator.myapplication;

import android.content.ContentResolver;
import android.database.Cursor;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleAdapter;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;

/**
* 获取联系人
*/
public class MainActivity extends AppCompatActivity {

private ContentResolver cr;
private List<Map<String,Object>> data;
private ListView lv_main_list;
private SimpleAdapter simpleAdapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv_main_list = (ListView)findViewById(R.id.lv_main_list);

//获取内容访问者
cr = getContentResolver();

data = new ArrayList<Map<String,Object>>();
//适配器
simpleAdapter = new SimpleAdapter(this,data,android.R.layout.simple_list_item_2,new String[]{"names","phones"},new int[]{android.R.id.text1,android.R.id.text2});
lv_main_list.setAdapter(simpleAdapter);
}

public void getContacts(View view){
Cursor cursor=cr.query(Uri.parse("content://com.android.contacts/raw_contacts"),null,null,null,null);
while(cursor.moveToNext()){
Map<String,Object> map=new HashMap<String,Object>();
int id=cursor.getInt(cursor.getColumnIndex("_id"));
String displayName=cursor.getString(cursor.getColumnIndex("display_name"));
Log.i("test",id+" "+displayName);
map.put("names",displayName);

//根据联系人获取联系人数据
Cursor cursor2=cr.query(Uri.parse("content://com.android.contacts/raw_contacts/"+id+"/data"),null,null,null,null);
while(cursor2.moveToNext()){
//  int type=cursor2.getInt(cursor2.getColumnIndex("mimetype_id"));
String type=cursor2.getString(cursor2.getColumnIndex("mimetype"));
String data1=null;
if ("vnd.android.cursor.item/phone_v2".equals(type)){
data1 = cursor2.getString(cursor2.getColumnIndex("data1"));
Log.i("test","   "+type+" "+data1);
map.put("phones",data1);
}
}
data.add(map);
}
//通知适配器发生改变
simpleAdapter.notifyDataSetChanged();
}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
tools:context="com.example.administrator.myapplication.MainActivity">

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="获取所有的联系人"
android:onClick="getContacts"
/>
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/lv_main_list"

></ListView>
</LinearLayout>

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