Android ContentProvider实现获取手机联系人功能

在之前项目中有用到关于获取手机联系人的部分，闲置就想和大家分享一下，话不多说，上代码:

java部分:

package com.example.content;

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;

public class MainActivity extends AppCompatActivity {

private ContentResolver cr;

@Override
protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 //获取内容访问者
 cr = getContentResolver();
}
public void getContacts(View view){
 Uri uri=Uri.parse("content://com.android.contacts/raw_contacts");
 Cursor cursor=cr.query(uri,null,null,null,null);
 while(cursor.moveToNext()){
  int _id=cursor.getInt(cursor.getColumnIndex("_id"));
  String display_name=cursor.getString(cursor.getColumnIndex("display_name"));
  Log.i("test",_id+" "+display_name);
  Uri uriData=Uri.parse("content://com.android.contacts/raw_contacts/"+_id+"/data");
  Cursor cursorData=cr.query(uriData,null,null,null,null);
  while(cursorData.moveToNext()){
   String mimetype=cursorData.getString(cursorData.getColumnIndex("mimetype"));
   String data1=cursorData.getString(cursorData.getColumnIndex("data1"));
   if("vnd.android.cursor.item/phone_v2".equals(mimetype)){
    Log.i("test","  "+mimetype+" "+data1);
   }
  }
 }
}
}

xml部分：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" tools:context="com.example.content.MainActivity">

<Button
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text="获取手机联系人"
 android:onClick="getContacts"
 />

</LinearLayout>

在需要获取系统的东西的时候一定不要忘记给权限啊

AndroidManifest.xml部分：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.content">

<!--获取手机的联系人-->
<uses-permission android:name="android.permission.READ_CONTACTS"></uses-permission>

<application android:allowBackup="true" android:icon="@mipmap/ic_launcher"
 android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round"
 android:supportsRtl="true" android:theme="@style/AppTheme">
 <activity android:name=".MainActivity">
  <intent-filter>
   <action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
  </intent-filter>
 </activity>
</application>

</manifest>