Android开发之中的一个个简单的通讯录实现（源代码）

通讯录就是一个ListView。我们须要通过数据库和ContentProvider来活动通讯录的数据。当然，我们应该提供选中后编辑的功能。

非常easy的一个通讯略Demo，所以。直接上代码，须要的看一下就知道。

不解释。

文件1： MyContacs

主活动页面。

package com.yarin.android.MyContacts;

import android.app.ListActivity;

import android.content.ComponentName;

import android.content.ContentUris;

import android.content.Intent;

import android.database.Cursor;

import android.net.Uri;

import android.os.Bundle;

import android.view.ContextMenu;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ContextMenu.ContextMenuInfo;

import android.widget.AdapterView;

import android.widget.ListView;

import android.widget.SimpleCursorAdapter;

public class MyContacts extends ListActivity{

	private static final int AddContact_ID = Menu.FIRST;

	//private static final int EditContact_ID = Menu.FIRST+1;

	private static final int DELEContact_ID = Menu.FIRST+2;

	private static final int EXITContact_ID = Menu.FIRST+3;

	public void onCreate(Bundle savedInstanceState)

	{

		super.onCreate(savedInstanceState);

		setDefaultKeyMode(DEFAULT_KEYS_SHORTCUT);

        Intent intent = getIntent();

        if (intent.getData() == null) {

            intent.setData(ContactsProvider.CONTENT_URI);

        }

        getListView().setOnCreateContextMenuListener(this);

        Cursor cursor = managedQuery(getIntent().getData(), ContactColumn.PROJECTION, null, null,null);

        //注冊每一个列表表示形式 ：姓名 + 移动电话

        SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,

			android.R.layout.simple_list_item_2,

			cursor,

			new String[] {ContactColumn.NAME, ContactColumn.MOBILENUM },

			new int[] { android.R.id.text1, android.R.id.text2 });

        setListAdapter(adapter);

	}

    public boolean onCreateOptionsMenu(Menu menu)

    {

        super.onCreateOptionsMenu(menu);

        //加入联系人

        menu.add(0, AddContact_ID, 0, R.string.add_user)

        	.setShortcut('3', 'a')

        	.setIcon(R.drawable.add);

        Intent intent = new Intent(null, getIntent().getData());

        intent.addCategory(Intent.CATEGORY_ALTERNATIVE);

        menu.addIntentOptions(Menu.CATEGORY_ALTERNATIVE, 0, 0,

                new ComponentName(this, MyContacts.class), null, intent, 0, null);

        //退出程序

        menu.add(0, EXITContact_ID, 0, R.string.exit)

    		.setShortcut('4', 'd')

    		.setIcon(R.drawable.exit);

        return true;

    }

    //处理菜单操作

    public boolean onOptionsItemSelected(MenuItem item)

    {

        switch (item.getItemId())

        {

        case AddContact_ID:

            //加入联系人

            startActivity(new Intent(Intent.ACTION_INSERT, getIntent().getData()));

            return true;

        case EXITContact_ID:

        	//退出程序

        	this.finish();

            return true;

        }

        return super.onOptionsItemSelected(item);

    }

    public boolean onPrepareOptionsMenu(Menu menu)

	{

		super.onPrepareOptionsMenu(menu);

		final boolean haveItems = getListAdapter().getCount() > 0;

		if (haveItems)

		{

			Uri uri = ContentUris.withAppendedId(getIntent().getData(), getSelectedItemId());

			Intent[] specifics = new Intent[2];

			specifics[0] = new Intent(Intent.ACTION_EDIT, uri);

			specifics[1] = new Intent(Intent.ACTION_VIEW, uri);

			MenuItem[] items = new MenuItem[2];

			//加入满足条件的菜单

			Intent intent = new Intent(null, uri);

			intent.addCategory(Intent.CATEGORY_ALTERNATIVE);

			menu.addIntentOptions(Menu.CATEGORY_ALTERNATIVE, 0, 0, null, specifics, intent, 0, items);

			if (items[0] != null)

			{

				//编辑联系人

				items[0].setShortcut('1', 'e').setIcon(R.drawable.edituser).setTitle(R.string.editor_user);

			}

			if (items[1] != null)

			{

				//查看联系人

				items[1].setShortcut('2', 'f').setTitle(R.string.view_user).setIcon(R.drawable.viewuser);

			}

		}

		else

		{

			menu.removeGroup(Menu.CATEGORY_ALTERNATIVE);

		}

		return true;

	}

    //动态菜单处理

    //点击的默认操作也能够在这里处理

    protected void onListItemClick(ListView l, View v, int position, long id)

    {

        Uri uri = ContentUris.withAppendedId(getIntent().getData(), id);

        String action = getIntent().getAction();

        if ( Intent.ACTION_EDIT.equals(action) )

		{

        	//编辑联系人

        	startActivity(new Intent(Intent.ACTION_EDIT, uri));

		}

        else

        {

        	//查看联系人

        	startActivity(new Intent(Intent.ACTION_VIEW, uri));

        }

    }

    //长按触发的菜单

	public void onCreateContextMenu(ContextMenu menu, View view, ContextMenuInfo menuInfo)

	{

		AdapterView.AdapterContextMenuInfo info;

		try

		{

			info = (AdapterView.AdapterContextMenuInfo) menuInfo;

		}

		catch (ClassCastException e)

		{

			return;

		}

		//得到长按的数据项

		Cursor cursor = (Cursor) getListAdapter().getItem(info.position);

		if (cursor == null)

		{

			return;

		}

		menu.setHeaderTitle(cursor.getString(1));

		//加入删除菜单

		menu.add(0, DELEContact_ID, 0, R.string.delete_user);

	}

    @Override

    public boolean onContextItemSelected(MenuItem item){

		AdapterView.AdapterContextMenuInfo info;

		try{

			info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();

		}catch (ClassCastException e){

			return false;

		}

		switch (item.getItemId()){

			case DELEContact_ID:{

				//删除一条记录

				Uri noteUri = ContentUris.withAppendedId(getIntent().getData(), info.id);

				getContentResolver().delete(noteUri, null, null);

				return true;

			}

		}

		return false;

	}

}

文件2  DBHelper

数据库相关操作。

package com.yarin.android.MyContacts;

import android.content.Context;

import android.database.sqlite.SQLiteDatabase;

import android.database.sqlite.SQLiteOpenHelper;

public class DBHelper extends SQLiteOpenHelper

{

	public static final String DATABASE_NAME = "mycontacts.db";//数据库名

	public static final int DATABASE_VERSION = 2;				 //版本号

	public static final String CONTACTS_TABLE = "contacts";	 //表名

	//创建表

	private static final String DATABASE_CREATE =

		"CREATE TABLE " + CONTACTS_TABLE +" ("

		+ ContactColumn._ID+" integer primary key autoincrement,"

		+ ContactColumn.NAME+" text,"

		+ ContactColumn.MOBILENUM+" text,"

		+ ContactColumn.HOMENUM+" text,"

		+ ContactColumn.ADDRESS+" text,"

		+ ContactColumn.EMAIL+" text,"

		+ ContactColumn.BLOG+" text);";

	public DBHelper(Context context)

	{

		super(context, DATABASE_NAME, null, DATABASE_VERSION);

	}

	public void onCreate(SQLiteDatabase db)

	{

		db.execSQL(DATABASE_CREATE);

	}

	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)

	{

		db.execSQL("DROP TABLE IF EXISTS " + CONTACTS_TABLE);

		onCreate(db);

	}

}

文件3 ContentsProvider

内容提供

package com.yarin.android.MyContacts;

import android.content.ContentProvider;

import android.content.ContentUris;

import android.content.ContentValues;

import android.content.UriMatcher;

import android.database.Cursor;

import android.database.SQLException;

import android.database.sqlite.SQLiteDatabase;

import android.database.sqlite.SQLiteQueryBuilder;

import android.net.Uri;

import android.text.TextUtils;

public class ContactsProvider extends ContentProvider{

	private DBHelper dbHelper;

	private SQLiteDatabase contactsDB;

	public static final String AUTHORITY = "com.yarin.android.provider.ContactsProvider";

	public static final String CONTACTS_TABLE = "contacts";

	public static final Uri CONTENT_URI = Uri.parse("content://" + AUTHORITY + "/"+CONTACTS_TABLE);

	/*=====================================================*/

	//以下是自己定义的类型

	public static final int CONTACTS = 1;

	public static final int CONTACT_ID = 2;

	private static final UriMatcher uriMatcher;

	static

	{

		uriMatcher = new UriMatcher(UriMatcher.NO_MATCH);

		uriMatcher.addURI(AUTHORITY,"contacts",CONTACTS);

		//单独列

		uriMatcher.addURI(AUTHORITY,"contacts/#",CONTACT_ID);

	}

	/*=====================================================*/

	@Override

	public boolean onCreate()

	{

		dbHelper = new DBHelper(getContext());

		//运行创建数据库

		contactsDB = dbHelper.getWritableDatabase();

		return (contactsDB == null) ?

false : true;

	}

	// 删除指定数据列

	@Override

	public int delete(Uri uri, String where, String[] selectionArgs)

	{

		int count;

		switch (uriMatcher.match(uri))

		{

			case CONTACTS:

				count = contactsDB.delete(CONTACTS_TABLE, where, selectionArgs);

				break;

			case CONTACT_ID:

				String contactID = uri.getPathSegments().get(1);

				count = contactsDB.delete(CONTACTS_TABLE,

										  ContactColumn._ID

										  + "=" + contactID

										  + (!TextUtils.isEmpty(where) ? " AND (" + where + ")" : ""),

										  selectionArgs);

				break;

			default:

				throw new IllegalArgumentException("Unsupported URI: " + uri);

		}

		getContext().getContentResolver().notifyChange(uri, null);

		return count;

	}

	// URI类型转换

	public String getType(Uri uri)

	{

		switch (uriMatcher.match(uri))

		{

			case CONTACTS:

				return "vnd.android.cursor.dir/vnd.yarin.android.mycontacts";

			case CONTACT_ID:

				return "vnd.android.cursor.item/vnd.yarin.android.mycontacts";

			default:

				throw new IllegalArgumentException("Unsupported URI: " + uri);

		}

	}

	// 插入数据

	public Uri insert(Uri uri, ContentValues initialValues)

	{

		if (uriMatcher.match(uri) != CONTACTS)

		{

			throw new IllegalArgumentException("Unknown URI " + uri);

		}

		ContentValues values;

		if (initialValues != null)

		{

			values = new ContentValues(initialValues);

		}

		else

		{

			values = new ContentValues();

		}

		// 设置默认值

		if (values.containsKey(ContactColumn.NAME) == false)

		{

			values.put(ContactColumn.NAME, "");

		}

		if (values.containsKey(ContactColumn.MOBILENUM) == false)

		{

			values.put(ContactColumn.MOBILENUM, "");

		}

		if (values.containsKey(ContactColumn.HOMENUM) == false)

		{

			values.put(ContactColumn.HOMENUM, "");

		}

		if (values.containsKey(ContactColumn.ADDRESS) == false)

		{

			values.put(ContactColumn.ADDRESS, "");

		}

		if (values.containsKey(ContactColumn.EMAIL) == false)

		{

			values.put(ContactColumn.EMAIL, "");

		}

		if (values.containsKey(ContactColumn.BLOG) == false)

		{

			values.put(ContactColumn.BLOG, "");

		}

		long rowId = contactsDB.insert(CONTACTS_TABLE, null, values);

		if (rowId > 0)

		{

			Uri noteUri = ContentUris.withAppendedId(CONTENT_URI, rowId);

			getContext().getContentResolver().notifyChange(noteUri, null);

			return noteUri;

		}

		throw new SQLException("Failed to insert row into " + uri);

	}

	// 查询数据

	public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder)

	{

		SQLiteQueryBuilder qb = new SQLiteQueryBuilder();

		qb.setTables(CONTACTS_TABLE);

		switch (uriMatcher.match(uri))

		{

			case CONTACT_ID:

				qb.appendWhere(ContactColumn._ID + "=" + uri.getPathSegments().get(1));

				break;

			default:

				break;

		}

		String orderBy;

		if (TextUtils.isEmpty(sortOrder))

		{

			orderBy = ContactColumn._ID;

		}

		else

		{

			orderBy = sortOrder;

		}

		Cursor c = qb.query(contactsDB, projection, selection, selectionArgs, null, null, orderBy);

		c.setNotificationUri(getContext().getContentResolver(), uri);

		return c;

	}

	// 更新数据库

	public int update(Uri uri, ContentValues values, String where, String[] selectionArgs)

	{

		int count;

		switch (uriMatcher.match(uri))

		{

			case CONTACTS:

				count = contactsDB.update(CONTACTS_TABLE, values, where, selectionArgs);

				break;

			case CONTACT_ID:

				String contactID = uri.getPathSegments().get(1);

				count = contactsDB.update(CONTACTS_TABLE, values, ContactColumn._ID + "=" + contactID

						+ (!TextUtils.isEmpty(where) ?

" AND (" + where + ")" : ""), selectionArgs);

				break;

			default:

				throw new IllegalArgumentException("Unsupported URI: " + uri);

		}

		getContext().getContentResolver().notifyChange(uri, null);

		return count;

	}

}

文件4 ContactView

package com.yarin.android.MyContacts;

import android.app.Activity;

import android.content.Intent;

import android.database.Cursor;

import android.net.Uri;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.TextView;

public class ContactView extends Activity

{

	private TextView mTextViewName;

	private TextView mTextViewMobile;

	private TextView mTextViewHome;

	private TextView mTextViewAddress;

	private TextView mTextViewEmail;

	private TextView mTextViewBlog;

    private Cursor mCursor;

    private Uri mUri;

    private static final int REVERT_ID = Menu.FIRST;

    private static final int DELETE_ID = Menu.FIRST + 1;

    private static final int EDITOR_ID = Menu.FIRST + 2;

    private static final int CALL_ID = Menu.FIRST + 3;

    private static final int SENDSMS_ID = Menu.FIRST + 4;

	public void onCreate(Bundle savedInstanceState)

	{

		super.onCreate(savedInstanceState);

		mUri = getIntent().getData();

		this.setContentView(R.layout.viewuser);

		mTextViewName = (TextView) findViewById(R.id.TextView_Name);

		mTextViewMobile = (TextView) findViewById(R.id.TextView_Mobile);

		mTextViewHome = (TextView) findViewById(R.id.TextView_Home);

		mTextViewAddress = (TextView) findViewById(R.id.TextView_Address);

		mTextViewEmail = (TextView) findViewById(R.id.TextView_Email);

		mTextViewBlog = (TextView) findViewById(R.id.TextView_Blog);

	    // 获得并保存原始联系人信息

        mCursor = managedQuery(mUri, ContactColumn.PROJECTION, null, null, null);

        mCursor.moveToFirst();

	}

    protected void onResume()

	{

		super.onResume();

		if (mCursor != null)

		{

			// 读取并显示联系人信息

			mCursor.moveToFirst();

			mTextViewName.setText(mCursor.getString(ContactColumn.NAME_COLUMN));

			mTextViewMobile.setText(mCursor.getString(ContactColumn.MOBILENUM_COLUMN));

			mTextViewHome.setText(mCursor.getString(ContactColumn.HOMENUM_COLUMN));

			mTextViewAddress.setText(mCursor.getString(ContactColumn.ADDRESS_COLUMN));

			mTextViewEmail.setText(mCursor.getString(ContactColumn.EMAIL_COLUMN));

			mTextViewBlog.setText(mCursor.getString(ContactColumn.BLOG_COLUMN));

		}

		else

		{

			setTitle("错误信息");

		}

	}

    public boolean onCreateOptionsMenu(Menu menu)

	{

		super.onCreateOptionsMenu(menu);

		//加入菜单

		menu.add(0, REVERT_ID, 0, R.string.revert).setShortcut('0', 'r').setIcon(R.drawable.listuser);

		menu.add(0, DELETE_ID, 0, R.string.delete_user).setShortcut('0', 'd').setIcon(R.drawable.remove);

		menu.add(0, EDITOR_ID, 0, R.string.editor_user).setShortcut('0', 'd').setIcon(R.drawable.edituser);

		menu.add(0, CALL_ID, 0, R.string.call_user).setShortcut('0', 'd').setIcon(R.drawable.calluser)

				.setTitle(this.getResources().getString(R.string.call_user));

		menu.add(0, SENDSMS_ID, 0, R.string.sendsms_user).setShortcut('0', 'd').setIcon(R.drawable.sendsms)

		.setTitle(this.getResources().getString(R.string.sendsms_user));

		return true;

	}

    public boolean onOptionsItemSelected(MenuItem item)

	{

		switch (item.getItemId())

		{

			//删除

			case DELETE_ID:

				deleteContact();

				finish();

				break;

			//返回列表

			case REVERT_ID:

				setResult(RESULT_CANCELED);

				finish();

				break;

			case EDITOR_ID:

			//编辑联系人

				startActivity(new Intent(Intent.ACTION_EDIT, mUri));

				break;

			case CALL_ID:

			//呼叫联系人

		        Intent call = new Intent(Intent.ACTION_CALL,Uri.parse("tel:"+mTextViewMobile.getText()));

		        startActivity(call);

				break;

			case SENDSMS_ID:

			//发短信给联系人

		        Intent sms = new Intent(Intent.ACTION_SENDTO,Uri.parse("smsto:"+mTextViewMobile.getText()));

		        startActivity(sms);

				break;

		}

		return super.onOptionsItemSelected(item);

	}

	// 删除联系人信息

	private void deleteContact()

	{

		if (mCursor != null)

		{

			mCursor.close();

			mCursor = null;

			getContentResolver().delete(mUri, null, null);

			setResult(RESULT_CANCELED);

		}

	}

}

文件5 ContactColumn

数据表定义

package com.yarin.android.MyContacts;

import android.provider.BaseColumns;

//定义数据

public class ContactColumn implements BaseColumns{

	public ContactColumn(){}

	//列名

	public static final String NAME = "name";				//姓名

	public static final String MOBILENUM = "mobileNumber";//移动电话

	public static final String HOMENUM = "homeNumber";	//家庭电话

	public static final String ADDRESS = "address";		//地址

	public static final String EMAIL = "email";			//邮箱

	public static final String BLOG = "blog";				//博客

	//列 索引值

	public static final int _ID_COLUMN = 0;

	public static final int NAME_COLUMN = 1;

	public static final int MOBILENUM_COLUMN = 2;

	public static final int HOMENUM_COLUMN = 3;

	public static final int ADDRESS_COLUMN = 4;

	public static final int EMAIL_COLUMN = 5;

	public static final int BLOG_COLUMN = 6;

	//查询结果

	public static final String[] PROJECTION ={

		_ID,

		NAME,

		MOBILENUM,

		HOMENUM,

		ADDRESS,

		EMAIL,

		BLOG,

	};

}

文件6

编辑状态下的页面

package com.yarin.android.MyContacts;

import android.app.Activity;

import android.content.ContentValues;

import android.content.Intent;

import android.database.Cursor;

import android.net.Uri;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

public class ContactEditor extends Activity{

	private static final int STATE_EDIT = 0;

    private static final int STATE_INSERT = 1;

    private static final int REVERT_ID = Menu.FIRST;

    private static final int DISCARD_ID = Menu.FIRST + 1;

    private static final int DELETE_ID = Menu.FIRST + 2;

    private Cursor mCursor;

    private int mState;

    private Uri mUri;

    private EditText nameText;

    private EditText mobileText;

    private EditText homeText;

    private EditText addressText;

    private EditText emailText;

    private EditText blogText;

    private Button okButton;

    private Button cancelButton;

	public void onCreate(Bundle savedInstanceState)

	{

        super.onCreate(savedInstanceState);

		final Intent intent = getIntent();

		final String action = intent.getAction();

		//依据action的不同进行不同的操作

		//编辑联系人

		if (Intent.ACTION_EDIT.equals(action))

		{

			mState = STATE_EDIT;

			mUri = intent.getData();

		}

		else if (Intent.ACTION_INSERT.equals(action))

		{

			//加入新联系人

			mState = STATE_INSERT;

			mUri = getContentResolver().insert(intent.getData(), null);

			if (mUri == null)

			{

				finish();

				return;

			}

			setResult(RESULT_OK, (new Intent()).setAction(mUri.toString()));

		}

		else

		{

			finish();

			return;

		}

        setContentView(R.layout.editorcontacts);

        nameText = (EditText) findViewById(R.id.EditText01);

        mobileText = (EditText) findViewById(R.id.EditText02);

        homeText = (EditText) findViewById(R.id.EditText03);

        addressText = (EditText) findViewById(R.id.EditText04);

        emailText = (EditText) findViewById(R.id.EditText05);

        blogText = (EditText) findViewById(R.id.EditText06);

        okButton = (Button)findViewById(R.id.Button01);

        cancelButton = (Button)findViewById(R.id.Button02);

        okButton.setOnClickListener(new OnClickListener()

        {

			public void onClick(View v)

			{

				String text = nameText.getText().toString();

				if(text.length()==0)

				{

					//假设没有输入东西。则不加入记录

					setResult(RESULT_CANCELED);

					deleteContact();

					finish();

				}

				else

				{

					//加入一条数据

					updateContact();

				}

			}

        });

        cancelButton.setOnClickListener(new OnClickListener()

        {

			public void onClick(View v)

			{

				if(mState == STATE_INSERT)

				{

					//不加入记录

					setResult(RESULT_CANCELED);

					deleteContact();

					finish();

				}

				else

				{

					//恢复到编辑前的状态

					backupContact();

				}

			}

        });

        // 获得并保存原始联系人信息

        mCursor = managedQuery(mUri, ContactColumn.PROJECTION, null, null, null);

        mCursor.moveToFirst();

	}

    protected void onResume()

	{

		super.onResume();

		if (mCursor != null)

		{

			// 读取并显示联系人信息

			mCursor.moveToFirst();

			if (mState == STATE_EDIT)

			{

				setTitle(getText(R.string.editor_user));

			}

			else if (mState == STATE_INSERT)

			{

				setTitle(getText(R.string.add_user));

			}

			String name = mCursor.getString(ContactColumn.NAME_COLUMN);

			String moblie = mCursor.getString(ContactColumn.MOBILENUM_COLUMN);

			String home = mCursor.getString(ContactColumn.HOMENUM_COLUMN);

			String address = mCursor.getString(ContactColumn.ADDRESS_COLUMN);

			String email = mCursor.getString(ContactColumn.EMAIL_COLUMN);

			String blog = mCursor.getString(ContactColumn.BLOG_COLUMN);

			nameText.setText(name);

			mobileText.setText(moblie);

			homeText.setText(home);

			addressText.setText(address);

			emailText.setText(email);

			blogText.setText(blog);

		}

		else

		{

			setTitle("错误信息");

		}

	}

    protected void onPause()

	{

		super.onPause();

		if (mCursor != null)

		{

			String text = nameText.getText().toString();

			if (text.length() == 0)

			{

				setResult(RESULT_CANCELED);

				deleteContact();

				// 更新信息

			}

			else

			{

				ContentValues values = new ContentValues();

				values.put(ContactColumn.NAME, nameText.getText().toString());

				values.put(ContactColumn.MOBILENUM, mobileText.getText().toString());

				values.put(ContactColumn.HOMENUM, homeText.getText().toString());

				values.put(ContactColumn.ADDRESS, addressText.getText().toString());

				values.put(ContactColumn.EMAIL, emailText.getText().toString());

				values.put(ContactColumn.BLOG, blogText.getText().toString());

				getContentResolver().update(mUri, values, null, null);

			}

		}

	}

    public boolean onCreateOptionsMenu(Menu menu)

    {

        super.onCreateOptionsMenu(menu);

        if (mState == STATE_EDIT)

        {

            menu.add(0, REVERT_ID, 0, R.string.revert)

                    .setShortcut('0', 'r')

                    .setIcon(R.drawable.listuser);

            menu.add(0, DELETE_ID, 0, R.string.delete_user)

            .setShortcut('0', 'f')

            .setIcon(R.drawable.remove);

        }

        else

        {

            menu.add(0, DISCARD_ID, 0, R.string.revert)

                    .setShortcut('0', 'd')

                    .setIcon(R.drawable.listuser);

        }

        return true;

    }

    //菜单处理

	@Override

    public boolean onOptionsItemSelected(MenuItem item)

	{

        switch (item.getItemId())

        {

        case DELETE_ID:

        	deleteContact();

            finish();

            break;

        case DISCARD_ID:

        	cancelContact();

            break;

        case REVERT_ID:

        	backupContact();

            break;

        }

        return super.onOptionsItemSelected(item);

    }

	//删除联系人信息

	private void deleteContact()

	{

		if (mCursor != null)

		{

            mCursor.close();

            mCursor = null;

            getContentResolver().delete(mUri, null, null);

            nameText.setText("");

        }

	}

	//丢弃信息

	private void cancelContact()

	{

		if (mCursor != null)

		{

			deleteContact();

        }

        setResult(RESULT_CANCELED);

        finish();

	}

	//更新 变更的信息

	private void updateContact()

	{

		if (mCursor != null)

		{

			mCursor.close();

            mCursor = null;

            ContentValues values = new ContentValues();

			values.put(ContactColumn.NAME, nameText.getText().toString());

			values.put(ContactColumn.MOBILENUM, mobileText.getText().toString());

			values.put(ContactColumn.HOMENUM, homeText.getText().toString());

			values.put(ContactColumn.ADDRESS, addressText.getText().toString());

			values.put(ContactColumn.EMAIL, emailText.getText().toString());

			values.put(ContactColumn.BLOG, blogText.getText().toString());

            getContentResolver().update(mUri, values, null, null);

        }

        setResult(RESULT_CANCELED);

        finish();

	}

	//取消用，回退到最初的信息

	private void backupContact()

	{

		if (mCursor != null)

		{

			mCursor.close();

            mCursor = null;

            ContentValues values = new ContentValues();

			values.put(ContactColumn.NAME, nameText.getText().toString());

			values.put(ContactColumn.MOBILENUM, mobileText.getText().toString());

			values.put(ContactColumn.HOMENUM, homeText.getText().toString());

			values.put(ContactColumn.ADDRESS, addressText.getText().toString());

			values.put(ContactColumn.EMAIL, emailText.getText().toString());

			values.put(ContactColumn.BLOG, blogText.getText().toString());

            getContentResolver().update(mUri, values, null, null);

        }

        setResult(RESULT_CANCELED);

        finish();

	}

}