009_02访问系统联系人数据库

 系统联系人contacts2.db存放位置：

MIMETYPE对应表

导出Contacts2.db使用SQLite Expert打开，选择data表：

其实上两张表是不同的。第二张表是在模拟器通讯录中删除了Woodrow联系人之后的，可以看到导出的表关于Woodrow的数据依然存在。

再来看看raw_contacts表删除Woodrow联系人之前和之后的情况：

可以发现contact_id为3的被置为null，所以手机中删除联系人并没有真正删除。

MainActivity.java

package com.example.visit_contacts;

import android.app.Activity;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    public void getContact(View v){
        ContentResolver cr = getContentResolver();
        Cursor c = cr.query(Uri.parse("content://com.android.contacts/raw_contacts"), new String[]{"contact_id"}, null, null, null);
        while(c.moveToNext()){
            int id = c.getInt(0);
            Cursor c2 = cr.query(Uri.parse("content://com.android.contacts/data"), new String[]{"mimetype","data1"}, 
                    "raw_contact_id=?", new String[]{id+""}, null);
            Contact contact = new Contact();
            while(c2.moveToNext()){
                String type = c2.getString(0);
                String data1 = c2.getString(1);
                if("vnd.android.cursor.item/name".equals(type)){
                    contact.setName(data1);
                }
                if("vnd.android.cursor.item/phone_v2".equals(type)){
                    contact.setNumber(data1);
                }
                if("vnd.android.cursor.item/email_v2".equals(type)){
                    contact.setEmail(data1);
                }
                Log.i("getContact", contact.toString());
                }
            }
    }
    
    public void addContact(View v){
        ContentResolver cr = getContentResolver();
        //step1:handle raw_contact table;
        Cursor c = cr.query(Uri.parse("content://com.android.contacts/raw_contacts"), new String[]{"_id"}, null, null, null);
        c.moveToLast();
        int id = c.getInt(0);
        int insert_id = id + 1;
        
        ContentValues cv = new ContentValues();
        cv.put("_id", insert_id);
        cv.put("contact_id", insert_id);
        cr.insert(Uri.parse("content://com.android.contacts/raw_contacts"), cv);
        
         //step2. handle data table
         //insert name 
         cv.clear();
         cv.put("_id", 9);
         cv.put("mimetype", "vnd.android.cursor.item/name");
         cv.put("raw_contact_id", insert_id);
         cv.put("data1", "zhangsanfeng");
         cr.insert(Uri.parse("content://com.android.contacts/data"), cv);
         
         //insert  phone_v2
         cv.clear();
         cv.put("_id", 10);
         cv.put("mimetype", "vnd.android.cursor.item/phone_v2");
         cv.put("raw_contact_id", insert_id);
         cv.put("data1", "13899998888");         
         cr.insert(Uri.parse("content://com.android.contacts/data"), cv);
         
         //insert email 
         cv.clear();
         cv.put("_id", 11);
         cv.put("mimetype", "vnd.android.cursor.item/email_v2");
         cv.put("raw_contact_id", insert_id);
         cv.put("data1", "zsf@163.com");
         cr.insert(Uri.parse("content://com.android.contacts/data"), cv);
    }
        

}

Contact.java

package com.example.visit_contacts;

public class Contact {

     private String name;
     private String number;
     private String email;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getNumber() {
        return number;
    }
    public void setNumber(String number) {
        this.number = number;
    }
    public String getEmail() {
        return email;
    }
    public void setEmail(String email) {
        this.email = email;
    }
    public Contact(String name, String number, String email) {
        super();
        this.name = name;
        this.number = number;
        this.email = email;
    }
    public Contact() {
        super();
        // TODO Auto-generated constructor stub
    }
    @Override
    public String toString() {
        return "Contact [name=" + name + ", number=" + number + ", email="
                + email + "]";
    }
     

}

activity_main.xml

<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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.visit_contacts.MainActivity"
    android:orientation="vertical" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
    
     <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="getContact"
        android:text="获取系统的联系人信息" />
      <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="新增系统的联系人信息" 
        android:onClick="addContact"
        />

</LinearLayout>