用ContentProvider为联系人添加上下文

 

 

在main.xml中：

 

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

  xmlns:android="http://schemas.android.com/apk/res/android"

  android:orientation="vertical"

  android:layout_width="fill_parent"

  android:layout_height="fill_parent"

  android:gravity="center_horizontal"

  android:background="#000000">

  <TextView

     android:id="@+id/mainInfo"

     android:layout_width="wrap_content"

     android:layout_height="wrap_content"

     android:textColor="#ffffff"

     android:text="手机联系人列表"/>

  <ListView

     android:id="@+id/contactList"

     android:background="#0066ff"

     android:layout_width="fill_parent"

     android:layout_height="fill_parent"/>

</LinearLayout>

 

 

 

 

 

 

 

新建布局文件contacts.xml：

 

<?xml version="1.0" encoding="utf-8"?>

<TableLayout

  xmlns:android="http://schemas.android.com/apk/res/android"

  android:orientation="vertical"

  android:layout_width="fill_parent"

  android:layout_height="fill_parent"

  android:background="#0066ff">

  <TableRow >

     <TextView

       android:id="@+id/_id"

       android:gravity="center_vertical"

       android:layout_width="wrap_content"

       android:layout_height="30dp"

       android:layout_marginLeft="16dp"

       android:textColor="#ffffff"/>

     <TextView

       android:id="@+id/name"

       android:gravity="center_vertical"

       android:textColor="#ffffff"

       android:layout_width="wrap_content"

       android:layout_height="30dp"

       android:layout_marginLeft="8dp"/>

  </TableRow>

</TableLayout>

 

 

 

 

在主Activity(ContentsDemo.java)中：

 

package com.li.contactsproject;

 

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

 

import android.net.Uri;

import android.os.Bundle;

import android.provider.ContactsContract;

import android.annotation.SuppressLint;

import android.app.Activity;

import android.database.Cursor;

import android.view.ContextMenu;

import android.view.ContextMenu.ContextMenuInfo;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.widget.Adapter;

import android.widget.AdapterView;

import android.widget.AdapterView.AdapterContextMenuInfo;

import android.widget.ListView;

import android.widget.SimpleAdapter;

import android.widget.Toast;

import android.support.v4.app.NavUtils;

 

@SuppressLint("ParserError")

public class ContentsDemo extends Activity {

  private Cursor result = null; //查询返回的结果

  private ListView contactsList = null; //定义ListView组件

  private List<Map<String,Object>> allContacts = null;

  private SimpleAdapter simple = null;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        super.setContentView(R.layout.main);

        this.contactsList = (ListView)super.findViewById(R.id.contactList);

        this.result = super.getContentResolver().query(ContactsContract

           .Contacts.CONTENT_URI, null, null, null, null);    //查询

        super.startManagingCursor(this.result);   //将结果集交给容器管理

        this.allContacts = new ArrayList<Map<String,Object>>();   //实例化List集合

        for(this.result.moveToFirst();!this.result.isAfterLast();

           this.result.moveToNext()){    //取出结果集中的每一个内容

        Map<String,Object> contact = new HashMap<String, Object>();

        contact.put("_id",this.result.getInt(this.result

             .getColumnIndex(ContactsContract.Contacts._ID)));

        contact.put("name",this.result.getString(this.result

             .getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME)));

        this.allContacts.add(contact);

        this.simple = new SimpleAdapter(this,this.allContacts,

             R.layout.contacts,new String[]{"_id","name"},new int[]{

             R.id._id,R.id.name});

        this.contactsList.setAdapter(this.simple);

        super.registerForContextMenu(this.contactsList); //注册上下文菜单

        }

       

    }

  @Override

  public boolean onContextItemSelected(MenuItem item) {

     AdapterView.AdapterContextMenuInfo info =

         (AdapterContextMenuInfo) item.getMenuInfo();

     int position = info.position; //取得操作位置

     String contactsId = this.allContacts.get(position).get("_id").toString();

     switch(item.getItemId()){   //进行菜单的操作

       case Menu.FIRST + 1:   //查看

         String phoneSelection = ContactsContract.CommonDataKinds

            .Phone.CONTACT_ID + "=?";

         String[] phoneSelectionArgs = new String[]{contactsId};

         Cursor c = super.getContentResolver().query(

              ContactsContract.CommonDataKinds.Phone.CONTENT_URI,

              null, phoneSelection, phoneSelectionArgs, null);

         StringBuffer buf = new StringBuffer();

         buf.append("电话号码是：");

         for(c.moveToFirst();!c.isAfterLast();c.moveToNext()){

           buf.append(c.getString(c.getColumnIndex(ContactsContract

                .CommonDataKinds.Phone.NUMBER))).append("、");

         }

         Toast.makeText(this,buf,Toast.LENGTH_SHORT).show();

         break;

       case Menu.FIRST + 2:   //删除

         super.getContentResolver().delete(Uri.withAppendedPath(

              ContactsContract.Contacts.CONTENT_URI, contactsId), null,null);

         this.allContacts.remove(position); //删除集合数据项

         this.simple.notifyDataSetChanged();  //通知改变

         Toast.makeText(this, "数据已成功删除！", Toast.LENGTH_SHORT).show();

         break;

     }

     return super.onContextItemSelected(item);

  }

  @Override

  public void onCreateContextMenu(ContextMenu menu, View v,

       ContextMenuInfo menuInfo) {   //创建菜单

     super.onCreateContextMenu(menu, v, menuInfo);

     menu.setHeaderTitle("联系人操作");

     menu.add(Menu.NONE,Menu.FIRST + 1,1,"详细信息");

     menu.add(menu.NONE,menu.FIRST + 2,1,"删除");

  }

   

}

 

 

 

 

在AndroidManifest.xml中修改权限：

 

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.li.contactsproject"

    android:versionCode="1"

    android:versionName="1.0" >

 

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="15" />

 

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".ContentsDemo"

            android:label="@string/title_activity_contents_demo" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

 

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

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

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

</manifest>