26.获取系统联系人ContentProvider

1.实现获取联系人关键代码:
    <1>content://com.android.contacts/raw_contacts（获得联系人的id，姓名）

    <2>content://com.android.contacts/raw_contacts/"+id+"/data（根据联系人的id获得联系人的信息）

2.具体代码如下所示

activity_main.xml

<?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.zking.android26_getcontacts.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>

MainActivity.java

package com.zking.android26_getcontacts;import android.content.ContentResolver;import android.database.Cursor;import android.net.Uri;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;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();    }    //一点击就拿联系人    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()){                 //获得联系人的id，姓名                 int _id=cursor.getInt(cursor.getColumnIndex("_id"));//拿列 联系人id+联系人姓名                 String display_name=cursor.getString(cursor.getColumnIndex("display_name"));                 Log.i("test",_id+" "+display_name);                 //拿联系人属于手机的隐私文件，所以需要加权限                 //根据联系人的id获得联系人的信息                 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);                      }                 }            }    }}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.zking.android26_getcontacts">    <!--获取手机的联系人  read_contacts-->    <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>

3.效果图: