【数据存储】SQLite数据库存储（9）----- 操作联系人的ContentProvider

<?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">
    <TableRow>
        <TextView
            android:id="@+id/_id"
            android:layout_height="wrap_content"
            android:layout_width="30px" />
        <TextView
            android:id="@+id/name"
            android:layout_height="wrap_content"
            android:layout_width="300px" />
    </TableRow>
</TableLayout>

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布局文件主页显示 ----- main.xml

<?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">
    <TextView
        android:id="@+id/mainInfo"
        android:textSize="20px"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="手机联系人列表"/>
    <ListView
        android:id="@+id/contactsList"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"/>
</LinearLayout>

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package org.lxh.demo;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;

public class ContactsDemo extends Activity {
    // 既然要查询，查询返回的就是结果
    private Cursor result = null; 
    // 定义ListView组件
    private ListView contactsList = null; 
    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.contactsList);  
        this.result = super.getContentResolver().query(
                ContactsContract.Contacts.CONTENT_URI, 
                null, null, null, null);
        // 将结果集交给容器管理
        super.startManagingCursor(this.result); 
        // 实例化List集合
        this.allContacts = new ArrayList<Map<String, Object>>(); 
        // 取出结果集中的每一个内容
        for (this.result.moveToFirst(); !this.result.isAfterLast();
          this.result.moveToNext()) { 
            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);
        // 注册菜单
        super.registerForContextMenu(this.contactsList); 
    }
@Override
    public boolean onContextItemSelected(MenuItem item) {
        AdapterView.AdapterContextMenuInfo info = 
                (AdapterView.AdapterContextMenuInfo) item
                .getMenuInfo();
        // 取得操作位置
        int position = info.position; 
        String contactsId =
            this.allContacts.get(position).get("_id").toString() ;
        // 进行菜单的操作
        switch(item.getItemId()){    
        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);
            // 删除集合数据项
            this.allContacts.remove(position) ;    
            // 通知改变
            this.simple.notifyDataSetChanged() ;    
            Toast.makeText(this, "数据已删除！",
               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, "查看详情");
        menu.add(Menu.NONE, Menu.FIRST + 2, 1, "删除信息");
    }

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

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