基于xmpp openfire smack开发之Android客户端开发[3]

在上两篇文章中，我们依次介绍openfire部署以及smack常用API的使用，这一节中我们着力介绍如何基于asmack开发一个Android的客户端，本篇的重点在实践，讲解和原理环节，大家可以参考前两篇的文章

基于xmpp openfire smack开发之openfire介绍和部署[1]

基于xmpp openfire smack开发之smack类库介绍和使用[2]

1.源码结构介绍

activity包下存放一些android页面交互相关的控制程序，还有一个些公共帮助类

db包为sqlite的工具类封装，这里做了一些自定义的改造，稍微仿Spring的JdbcTemplate结构，使用起来更加方便一点

manager包留下主要是一些管理组件，包括联系人管理，消息管理，提醒管理，离线消息管理，用户管理，xmpp连接管理

model包中都是一些对象模型，传输介质

service中存放一些android后台的核心服务，主要包括聊天服务，联系人服务，系统消息服务，重连接服务

task包中存放一些耗时的异步操作

util中存放一些常用的工具类

view中一些和android的UI相关的显示控件

anim中存放一些动画元素的配置

layout是布局页面

menu是地步菜单布局页面

values中存放一些字符，颜色，样式，参数的配置信息

其中strings.xml中，保存的缺省配置为gtalk的服务器信息，大家如果有谷歌gtalk的账号可以直接登录，否则需要更改这里的配置才可以使用其他的xmpp服务器

<!-- 缺省的服务器配置 -->
  <integer name="xmpp_port">5222</integer>
  <string name="xmpp_host">talk.google.com</string>
  <string name="xmpp_service_name">gmail.com</string>
  <bool name="is_remember">true</bool>
  <bool name="is_autologin">false</bool>
  <bool name="is_novisible">false</bool>

AndroidManifest.xml为android功能清单的配置文件，我们这里开放的权限并不多

    <!-- 访问Internet -->
<uses-permission android:name="android.permission.INTERNET" />
<!--- 访问网络状态 -->
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <!-- 往SDCard写入数据权限 -->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
   <span style="WHITE-SPACE: pre">  </span><!-- 在SDCard中创建与删除文件权限 -->
   <span style="WHITE-SPACE: pre">  </span><uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
   <span style="WHITE-SPACE: pre">  </span><!-- 往SDCard写入数据权限 -->
   <span style="WHITE-SPACE: pre">  </span><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

2.核心类介绍

1.ActivitySupport类

package csdn.shimiso.eim.activity;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.location.LocationManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.os.Environment;
import android.provider.Settings;
import android.view.inputmethod.InputMethodManager;
import android.widget.Toast;
import csdn.shimiso.eim.R;
import csdn.shimiso.eim.comm.Constant;
import csdn.shimiso.eim.model.LoginConfig;
import csdn.shimiso.eim.service.IMChatService;
import csdn.shimiso.eim.service.IMContactService;
import csdn.shimiso.eim.service.IMSystemMsgService;
import csdn.shimiso.eim.service.ReConnectService;

/**
 * Actity 工具支持类
 *
 * @author shimiso
 *
 */
public class ActivitySupport extends Activity implements IActivitySupport {

    protected Context context = null;
    protected SharedPreferences preferences;
    protected EimApplication eimApplication;
    protected ProgressDialog pg = null;
    protected NotificationManager notificationManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        context = this;
        preferences = getSharedPreferences(Constant.LOGIN_SET, 0);
        notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        pg = new ProgressDialog(context);
        eimApplication = (EimApplication) getApplication();
        eimApplication.addActivity(this);
    }

    @Override
    protected void onStart() {
        super.onStart();
    }

    @Override
    protected void onResume() {
        super.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
    }

    @Override
    protected void onStop() {
        super.onStop();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
    }

    @Override
    public ProgressDialog getProgressDialog() {
        return pg;
    }

    @Override
    public void startService() {
        // 好友联系人服务
        Intent server = new Intent(context, IMContactService.class);
        context.startService(server);
        // 聊天服务
        Intent chatServer = new Intent(context, IMChatService.class);
        context.startService(chatServer);
        // 自动恢复连接服务
        Intent reConnectService = new Intent(context, ReConnectService.class);
        context.startService(reConnectService);
        // 系统消息连接服务
        Intent imSystemMsgService = new Intent(context,
                IMSystemMsgService.class);
        context.startService(imSystemMsgService);
    }

    /**
     *
     * 销毁服务.
     *
     * @author shimiso
     * @update 2012-5-16 下午12:16:08
     */
    @Override
    public void stopService() {
        // 好友联系人服务
        Intent server = new Intent(context, IMContactService.class);
        context.stopService(server);
        // 聊天服务
        Intent chatServer = new Intent(context, IMChatService.class);
        context.stopService(chatServer);

        // 自动恢复连接服务
        Intent reConnectService = new Intent(context, ReConnectService.class);
        context.stopService(reConnectService);

        // 系统消息连接服务
        Intent imSystemMsgService = new Intent(context,
                IMSystemMsgService.class);
        context.stopService(imSystemMsgService);
    }

    @Override
    public void isExit() {
        new AlertDialog.Builder(context).setTitle("确定退出吗?")
                .setNeutralButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        stopService();
                        eimApplication.exit();
                    }
                })
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                    }
                }).show();
    }

    @Override
    public boolean hasInternetConnected() {
        ConnectivityManager manager = (ConnectivityManager) context
                .getSystemService(context.CONNECTIVITY_SERVICE);
        if (manager != null) {
            NetworkInfo network = manager.getActiveNetworkInfo();
            if (network != null && network.isConnectedOrConnecting()) {
                return true;
            }
        }
        return false;
    }

    @Override
    public boolean validateInternet() {
        ConnectivityManager manager = (ConnectivityManager) context
                .getSystemService(context.CONNECTIVITY_SERVICE);
        if (manager == null) {
            openWirelessSet();
            return false;
        } else {
            NetworkInfo[] info = manager.getAllNetworkInfo();
            if (info != null) {
                for (int i = 0; i < info.length; i++) {
                    if (info[i].getState() == NetworkInfo.State.CONNECTED) {
                        return true;
                    }
                }
            }
        }
        openWirelessSet();
        return false;
    }

    @Override
    public boolean hasLocationGPS() {
        LocationManager manager = (LocationManager) context
                .getSystemService(context.LOCATION_SERVICE);
        if (manager
                .isProviderEnabled(android.location.LocationManager.GPS_PROVIDER)) {
            return true;
        } else {
            return false;
        }
    }

    @Override
    public boolean hasLocationNetWork() {
        LocationManager manager = (LocationManager) context
                .getSystemService(context.LOCATION_SERVICE);
        if (manager
                .isProviderEnabled(android.location.LocationManager.NETWORK_PROVIDER)) {
            return true;
        } else {
            return false;
        }
    }

    @Override
    public void checkMemoryCard() {
        if (!Environment.MEDIA_MOUNTED.equals(Environment
                .getExternalStorageState())) {
            new AlertDialog.Builder(context)
                    .setTitle(R.string.prompt)
                    .setMessage("请检查内存卡")
                    .setPositiveButton(R.string.menu_settings,
                            new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog,
                                        int which) {
                                    dialog.cancel();
                                    Intent intent = new Intent(
                                            Settings.ACTION_SETTINGS);
                                    context.startActivity(intent);
                                }
                            })
                    .setNegativeButton("退出",
                            new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog,
                                        int which) {
                                    dialog.cancel();
                                    eimApplication.exit();
                                }
                            }).create().show();
        }
    }

    public void openWirelessSet() {
        AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(context);
        dialogBuilder
                .setTitle(R.string.prompt)
                .setMessage(context.getString(R.string.check_connection))
                .setPositiveButton(R.string.menu_settings,
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog,
                                    int which) {
                                dialog.cancel();
                                Intent intent = new Intent(
                                        Settings.ACTION_WIRELESS_SETTINGS);
                                context.startActivity(intent);
                            }
                        })
                .setNegativeButton(R.string.close,
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog,
                                    int whichButton) {
                                dialog.cancel();
                            }
                        });
        dialogBuilder.show();
    }

    /**
     *
     * 显示toast
     *
     * @param text
     * @param longint
     * @author shimiso
     * @update 2012-6-28 下午3:46:18
     */
    public void showToast(String text, int longint) {
        Toast.makeText(context, text, longint).show();
    }

    @Override
    public void showToast(String text) {
        Toast.makeText(context, text, Toast.LENGTH_SHORT).show();
    }

    /**
     *
     * 关闭键盘事件
     *
     * @author shimiso
     * @update 2012-7-4 下午2:34:34
     */
    public void closeInput() {
        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        if (inputMethodManager != null && this.getCurrentFocus() != null) {
            inputMethodManager.hideSoftInputFromWindow(this.getCurrentFocus()
                    .getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
        }
    }

    /**
     *
     * 发出Notification的method.
     *
     * @param iconId
     *            图标
     * @param contentTitle
     *            标题
     * @param contentText
     *            你内容
     * @param activity
     * @author shimiso
     * @update 2012-5-14 下午12:01:55
     */
    public void setNotiType(int iconId, String contentTitle,
            String contentText, Class activity, String from) {
        /*
         * 创建新的Intent，作为点击Notification留言条时， 会运行的Activity
         */
        Intent notifyIntent = new Intent(this, activity);
        notifyIntent.putExtra("to", from);
        // notifyIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

        /* 创建PendingIntent作为设置递延运行的Activity */
        PendingIntent appIntent = PendingIntent.getActivity(this, 0,
                notifyIntent, 0);

        /* 创建Notication，并设置相关参数 */
        Notification myNoti = new Notification();
        // 点击自动消失
        myNoti.flags = Notification.FLAG_AUTO_CANCEL;
        /* 设置statusbar显示的icon */
        myNoti.icon = iconId;
        /* 设置statusbar显示的文字信息 */
        myNoti.tickerText = contentTitle;
        /* 设置notification发生时同时发出默认声音 */
        myNoti.defaults = Notification.DEFAULT_SOUND;
        /* 设置Notification留言条的参数 */
        myNoti.setLatestEventInfo(this, contentTitle, contentText, appIntent);
        /* 送出Notification */
        notificationManager.notify(0, myNoti);
    }

    @Override
    public Context getContext() {
        return context;
    }

    @Override
    public SharedPreferences getLoginUserSharedPre() {
        return preferences;
    }

    @Override
    public void saveLoginConfig(LoginConfig loginConfig) {
        preferences.edit()
                .putString(Constant.XMPP_HOST, loginConfig.getXmppHost())
                .commit();
        preferences.edit()
                .putInt(Constant.XMPP_PORT, loginConfig.getXmppPort()).commit();
        preferences
                .edit()
                .putString(Constant.XMPP_SEIVICE_NAME,
                        loginConfig.getXmppServiceName()).commit();
        preferences.edit()
                .putString(Constant.USERNAME, loginConfig.getUsername())
                .commit();
        preferences.edit()
                .putString(Constant.PASSWORD, loginConfig.getPassword())
                .commit();
        preferences.edit()
                .putBoolean(Constant.IS_AUTOLOGIN, loginConfig.isAutoLogin())
                .commit();
        preferences.edit()
                .putBoolean(Constant.IS_NOVISIBLE, loginConfig.isNovisible())
                .commit();
        preferences.edit()
                .putBoolean(Constant.IS_REMEMBER, loginConfig.isRemember())
                .commit();
        preferences.edit()
                .putBoolean(Constant.IS_ONLINE, loginConfig.isOnline())
                .commit();
        preferences.edit()
                .putBoolean(Constant.IS_FIRSTSTART, loginConfig.isFirstStart())
                .commit();
    }

    @Override
    public LoginConfig getLoginConfig() {
        LoginConfig loginConfig = new LoginConfig();
        String a = preferences.getString(Constant.XMPP_HOST, null);
        String b = getResources().getString(R.string.xmpp_host);
        loginConfig.setXmppHost(preferences.getString(Constant.XMPP_HOST,
                getResources().getString(R.string.xmpp_host)));
        loginConfig.setXmppPort(preferences.getInt(Constant.XMPP_PORT,
                getResources().getInteger(R.integer.xmpp_port)));
        loginConfig.setUsername(preferences.getString(Constant.USERNAME, null));
        loginConfig.setPassword(preferences.getString(Constant.PASSWORD, null));
        loginConfig.setXmppServiceName(preferences.getString(
                Constant.XMPP_SEIVICE_NAME,
                getResources().getString(R.string.xmpp_service_name)));
        loginConfig.setAutoLogin(preferences.getBoolean(Constant.IS_AUTOLOGIN,
                getResources().getBoolean(R.bool.is_autologin)));
        loginConfig.setNovisible(preferences.getBoolean(Constant.IS_NOVISIBLE,
                getResources().getBoolean(R.bool.is_novisible)));
        loginConfig.setRemember(preferences.getBoolean(Constant.IS_REMEMBER,
                getResources().getBoolean(R.bool.is_remember)));
        loginConfig.setFirstStart(preferences.getBoolean(
                Constant.IS_FIRSTSTART, true));
        return loginConfig;
    }

    @Override
    public boolean getUserOnlineState() {
        // preferences = getSharedPreferences(Constant.LOGIN_SET,0);
        return preferences.getBoolean(Constant.IS_ONLINE, true);
    }

    @Override
    public void setUserOnlineState(boolean isOnline) {
        // preferences = getSharedPreferences(Constant.LOGIN_SET,0);
        preferences.edit().putBoolean(Constant.IS_ONLINE, isOnline).commit();

    }

    @Override
    public EimApplication getEimApplication() {
        return eimApplication;
    }
}

大家写android程序会发现，不同的activity之间经常需要调用一些公共的资源，这里的资源不仅包括android自身的，还有我们自己的管理服务类，甚至相互之间传递一些参数，这里我仿照struts2的设计，提炼出一个ActivitySupport类，同时抽取一个接口，让所有的Activity都集成这个类，因为有了接口，我们便可以采用回调模式，非常方便的传递数据和使用公共的资源，这种好处相信大家使用之后都能有深刻的体会，通过接口回调传递参数和相互调用的方式无疑是最优雅的，spring和hibernate源码中曾经大量使用这种结构。

 

2.SQLiteTemplate类

package csdn.shimiso.eim.db;

import java.util.ArrayList;
import java.util.List;

import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

/**
 * SQLite数据库模板工具类
 *
 * 该类提供了数据库操作常用的增删改查,以及各种复杂条件匹配,分页,排序等操作
 *
 * @see SQLiteDatabase
 */
public class SQLiteTemplate {
    /**
     * Default Primary key
     */
    protected String mPrimaryKey = "_id";

    /**
     * DBManager
     */
    private DBManager dBManager;
    /**
     * 是否为一个事务
     */
    private boolean isTransaction = false;
    /**
     * 数据库连接
     */
    private SQLiteDatabase dataBase = null;

    private SQLiteTemplate() {
    }

    private SQLiteTemplate(DBManager dBManager, boolean isTransaction) {
        this.dBManager = dBManager;
        this.isTransaction = isTransaction;
    }

    /**
     * isTransaction 是否属于一个事务 注:一旦isTransaction设为true
     * 所有的SQLiteTemplate方法都不会自动关闭资源,需在事务成功后手动关闭
     *
     * @return
     */
    public static SQLiteTemplate getInstance(DBManager dBManager,
            boolean isTransaction) {
        return new SQLiteTemplate(dBManager, isTransaction);
    }

    /**
     * 执行一条sql语句
     *
     * @param name
     * @param tel
     */
    public void execSQL(String sql) {
        try {
            dataBase = dBManager.openDatabase();
            dataBase.execSQL(sql);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (!isTransaction) {
                closeDatabase(null);
            }
        }
    }

    /**
     * 执行一条sql语句
     *
     * @param name
     * @param tel
     */
    public void execSQL(String sql, Object[] bindArgs) {
        try {
            dataBase = dBManager.openDatabase();
            dataBase.execSQL(sql, bindArgs);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (!isTransaction) {
                closeDatabase(null);
            }
        }
    }

    /**
     * 向数据库表中插入一条数据
     *
     * @param table
     *            表名
     * @param content
     *            字段值
     */
    public long insert(String table, ContentValues content) {
        try {
            dataBase = dBManager.openDatabase();
            // insert方法第一参数：数据库表名，第二个参数如果CONTENT为空时则向表中插入一个NULL,第三个参数为插入的内容
            return dataBase.insert(table, null, content);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (!isTransaction) {
                closeDatabase(null);
            }
        }
        return 0;
    }

    /**
     * 批量删除指定主键数据
     *
     * @param ids
     */
    public void deleteByIds(String table, Object... primaryKeys) {
        try {
            if (primaryKeys.length > 0) {
                StringBuilder sb = new StringBuilder();
                for (@SuppressWarnings("unused")
                Object id : primaryKeys) {
                    sb.append("?").append(",");
                }
                sb.deleteCharAt(sb.length() - 1);
                dataBase = dBManager.openDatabase();
                dataBase.execSQL("delete from " + table + " where "
                        + mPrimaryKey + " in(" + sb + ")",
                        (Object[]) primaryKeys);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (!isTransaction) {
                closeDatabase(null);
            }
        }
    }

    /**
     * 根据某一个字段和值删除一行数据, 如 name="jack"
     *
     * @param table
     * @param field
     * @param value
     * @return 返回值大于0表示删除成功
     */
    public int deleteByField(String table, String field, String value) {
        try {
            dataBase = dBManager.openDatabase();
            return dataBase.delete(table, field + "=?", new String[] { value });
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (!isTransaction) {
                closeDatabase(null);
            }
        }
        return 0;
    }

    /**
     * 根据条件删除数据
     *
     * @param table
     *            表名
     * @param whereClause
     *            查询语句 参数采用?
     * @param whereArgs
     *            参数值
     * @return 返回值大于0表示删除成功
     */
    public int deleteByCondition(String table, String whereClause,
            String[] whereArgs) {
        try {
            dataBase = dBManager.openDatabase();
            return dataBase.delete(table, whereClause, whereArgs);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (!isTransaction) {
                closeDatabase(null);
            }
        }
        return 0;
    }

    /**
     * 根据主键删除一行数据
     *
     * @param table
     * @param id
     * @return 返回值大于0表示删除成功
     */
    public int deleteById(String table, String id) {
        try {
            dataBase = dBManager.openDatabase();
            return deleteByField(table, mPrimaryKey, id);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (!isTransaction) {
                closeDatabase(null);
            }
        }
        return 0;
    }

    /**
     * 根据主键更新一行数据
     *
     * @param table
     * @param id
     * @param values
     * @return 返回值大于0表示更新成功
     */
    public int updateById(String table, String id, ContentValues values) {
        try {
            dataBase = dBManager.openDatabase();
            return dataBase.update(table, values, mPrimaryKey + "=?",
                    new String[] { id });
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (!isTransaction) {
                closeDatabase(null);
            }
        }
        return 0;
    }

    /**
     * 更新数据
     *
     * @param table
     * @param values
     * @param whereClause
     * @param whereArgs
     * @return 返回值大于0表示更新成功
     */
    public int update(String table, ContentValues values, String whereClause,
            String[] whereArgs) {
        try {
            dataBase = dBManager.openDatabase();
            return dataBase.update(table, values, whereClause, whereArgs);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (!isTransaction) {
                closeDatabase(null);
            }
        }
        return 0;
    }

    /**
     * 根据主键查看某条数据是否存在
     *
     * @param table
     * @param id
     * @return
     */
    public Boolean isExistsById(String table, String id) {
        try {
            dataBase = dBManager.openDatabase();
            return isExistsByField(table, mPrimaryKey, id);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (!isTransaction) {
                closeDatabase(null);
            }
        }
        return null;
    }

    /**
     * 根据某字段/值查看某条数据是否存在
     *
     * @param status
     * @return
     */
    public Boolean isExistsByField(String table, String field, String value) {
        StringBuilder sql = new StringBuilder();
        sql.append("SELECT COUNT(*) FROM ").append(table).append(" WHERE ")
                .append(field).append(" =?");
        try {
            dataBase = dBManager.openDatabase();
            return isExistsBySQL(sql.toString(), new String[] { value });
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (!isTransaction) {
                closeDatabase(null);
            }
        }
        return null;
    }

    /**
     * 使用SQL语句查看某条数据是否存在
     *
     * @param sql
     * @param selectionArgs
     * @return
     */
    public Boolean isExistsBySQL(String sql, String[] selectionArgs) {
        Cursor cursor = null;
        try {
            dataBase = dBManager.openDatabase();
            cursor = dataBase.rawQuery(sql, selectionArgs);
            if (cursor.moveToFirst()) {
                return (cursor.getInt(0) > 0);
            } else {
                return false;
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (!isTransaction) {
                closeDatabase(cursor);
            }
        }
        return null;
    }

    /**
     * 查询一条数据
     *
     * @param rowMapper
     * @param sql
     * @param args
     * @return
     */
    public <T> T queryForObject(RowMapper<T> rowMapper, String sql,
            String[] args) {
        Cursor cursor = null;
        T object = null;
        try {
            dataBase = dBManager.openDatabase();
            cursor = dataBase.rawQuery(sql, args);
            if (cursor.moveToFirst()) {
                object = rowMapper.mapRow(cursor, cursor.getCount());
            }
        } finally {
            if (!isTransaction) {
                closeDatabase(cursor);
            }
        }
        return object;

    }

    /**
     * 查询
     *
     * @param rowMapper
     * @param sql
     * @param startResult
     *            开始索引 注:第一条记录索引为0
     * @param maxResult
     *            步长
     * @return
     */
    public <T> List<T> queryForList(RowMapper<T> rowMapper, String sql,
            String[] selectionArgs) {
        Cursor cursor = null;
        List<T> list = null;
        try {
            dataBase = dBManager.openDatabase();
            cursor = dataBase.rawQuery(sql, selectionArgs);
            list = new ArrayList<T>();
            while (cursor.moveToNext()) {
                list.add(rowMapper.mapRow(cursor, cursor.getPosition()));
            }
        } finally {
            if (!isTransaction) {
                closeDatabase(cursor);
            }
        }
        return list;
    }

    /**
     * 分页查询
     *
     * @param rowMapper
     * @param sql
     * @param startResult
     *            开始索引 注:第一条记录索引为0
     * @param maxResult
     *            步长
     * @return
     */
    public <T> List<T> queryForList(RowMapper<T> rowMapper, String sql,
            int startResult, int maxResult) {
        Cursor cursor = null;
        List<T> list = null;
        try {
            dataBase = dBManager.openDatabase();
            cursor = dataBase.rawQuery(sql + " limit ?,?", new String[] {
                    String.valueOf(startResult), String.valueOf(maxResult) });
            list = new ArrayList<T>();
            while (cursor.moveToNext()) {
                list.add(rowMapper.mapRow(cursor, cursor.getPosition()));
            }
        } finally {
            if (!isTransaction) {
                closeDatabase(cursor);
            }
        }
        return list;
    }

    /**
     * 获取记录数
     *
     * @return
     */
    public Integer getCount(String sql, String[] args) {
        Cursor cursor = null;
        try {
            dataBase = dBManager.openDatabase();
            cursor = dataBase.rawQuery("select count(*) from (" + sql + ")",
                    args);
            if (cursor.moveToNext()) {
                return cursor.getInt(0);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (!isTransaction) {
                closeDatabase(cursor);
            }
        }
        return 0;
    }

    /**
     * 分页查询
     *
     * @param rowMapper
     * @param table
     *            检索的表
     * @param columns
     *            由需要返回列的列名所组成的字符串数组，传入null会返回所有的列。
     * @param selection
     *            查询条件子句，相当于select语句where关键字后面的部分，在条件子句允许使用占位符"?"
     * @param selectionArgs
     *            对应于selection语句中占位符的值，值在数组中的位置与占位符在语句中的位置必须一致，否则就会有异常
     * @param groupBy
     *            对结果集进行分组的group by语句（不包括GROUP BY关键字）。传入null将不对结果集进行分组
     * @param having
     *            对查询后的结果集进行过滤,传入null则不过滤
     * @param orderBy
     *            对结果集进行排序的order by语句（不包括ORDER BY关键字）。传入null将对结果集使用默认的排序
     * @param limit
     *            指定偏移量和获取的记录数，相当于select语句limit关键字后面的部分,如果为null则返回所有行
     * @return
     */
    public <T> List<T> queryForList(RowMapper<T> rowMapper, String table,
            String[] columns, String selection, String[] selectionArgs,
            String groupBy, String having, String orderBy, String limit) {
        List<T> list = null;
        Cursor cursor = null;
        try {
            dataBase = dBManager.openDatabase();
            cursor = dataBase.query(table, columns, selection, selectionArgs,
                    groupBy, having, orderBy, limit);
            list = new ArrayList<T>();
            while (cursor.moveToNext()) {
                list.add(rowMapper.mapRow(cursor, cursor.getPosition()));
            }
        } finally {
            if (!isTransaction) {
                closeDatabase(cursor);
            }
        }
        return list;
    }

    /**
     * Get Primary Key
     *
     * @return
     */
    public String getPrimaryKey() {
        return mPrimaryKey;
    }

    /**
     * Set Primary Key
     *
     * @param primaryKey
     */
    public void setPrimaryKey(String primaryKey) {
        this.mPrimaryKey = primaryKey;
    }

    /**
     *
     * @author shimiso
     *
     * @param <T>
     */
    public interface RowMapper<T> {
        /**
         *
         * @param cursor
         *            游标
         * @param index
         *            下标索引
         * @return
         */
        public T mapRow(Cursor cursor, int index);
    }

    /**
     * 关闭数据库
     */
    public void closeDatabase(Cursor cursor) {
        if (null != dataBase) {
            dataBase.close();
        }
        if (null != cursor) {
            cursor.close();
        }
    }
}

 

我们希望在android操作数据库是优雅的一种方式，这里不必关注事务，也不用担心分页，更不用为了封装传递对象烦恼，总之一切就像面向对象那样，简单，模板类的出现正是解决这个问题，虽然它看上去可能不是那么完美有待提高，这里我封装了很多sqlite常用的工具，大家可以借鉴使用。

 

3.XmppConnectionManager管理类

package csdn.shimiso.eim.manager;

import org.jivesoftware.smack.Connection;
import org.jivesoftware.smack.ConnectionConfiguration;
import org.jivesoftware.smack.Roster;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.provider.ProviderManager;
import org.jivesoftware.smackx.GroupChatInvitation;
import org.jivesoftware.smackx.PrivateDataManager;
import org.jivesoftware.smackx.packet.ChatStateExtension;
import org.jivesoftware.smackx.packet.LastActivity;
import org.jivesoftware.smackx.packet.OfflineMessageInfo;
import org.jivesoftware.smackx.packet.OfflineMessageRequest;
import org.jivesoftware.smackx.packet.SharedGroupsInfo;
import org.jivesoftware.smackx.provider.DataFormProvider;
import org.jivesoftware.smackx.provider.DelayInformationProvider;
import org.jivesoftware.smackx.provider.DiscoverInfoProvider;
import org.jivesoftware.smackx.provider.DiscoverItemsProvider;
import org.jivesoftware.smackx.provider.MUCAdminProvider;
import org.jivesoftware.smackx.provider.MUCOwnerProvider;
import org.jivesoftware.smackx.provider.MUCUserProvider;
import org.jivesoftware.smackx.provider.MessageEventProvider;
import org.jivesoftware.smackx.provider.MultipleAddressesProvider;
import org.jivesoftware.smackx.provider.RosterExchangeProvider;
import org.jivesoftware.smackx.provider.StreamInitiationProvider;
import org.jivesoftware.smackx.provider.VCardProvider;
import org.jivesoftware.smackx.provider.XHTMLExtensionProvider;
import org.jivesoftware.smackx.search.UserSearch;

import csdn.shimiso.eim.model.LoginConfig;

/**
 *
 * XMPP服务器连接工具类.
 *
 * @author shimiso
 */
public class XmppConnectionManager {
    private XMPPConnection connection;
    private static ConnectionConfiguration connectionConfig;
    private static XmppConnectionManager xmppConnectionManager;

    private XmppConnectionManager() {

    }

    public static XmppConnectionManager getInstance() {
        if (xmppConnectionManager == null) {
            xmppConnectionManager = new XmppConnectionManager();
        }
        return xmppConnectionManager;
    }

    // init
    public XMPPConnection init(LoginConfig loginConfig) {
        Connection.DEBUG_ENABLED = false;
        ProviderManager pm = ProviderManager.getInstance();
        configure(pm);

        connectionConfig = new ConnectionConfiguration(
                loginConfig.getXmppHost(), loginConfig.getXmppPort(),
                loginConfig.getXmppServiceName());
        connectionConfig.setSASLAuthenticationEnabled(false);// 不使用SASL验证，设置为false
        connectionConfig
                .setSecurityMode(ConnectionConfiguration.SecurityMode.enabled);
        // 允许自动连接
        connectionConfig.setReconnectionAllowed(false);
        // 允许登陆成功后更新在线状态
        connectionConfig.setSendPresence(true);
        // 收到好友邀请后manual表示需要经过同意,accept_all表示不经同意自动为好友
        Roster.setDefaultSubscriptionMode(Roster.SubscriptionMode.manual);
        connection = new XMPPConnection(connectionConfig);
        return connection;
    }

    /**
     *
     * 返回一个有效的xmpp连接,如果无效则返回空.
     *
     * @return
     * @author shimiso
     * @update 2012-7-4 下午6:54:31
     */
    public XMPPConnection getConnection() {
        if (connection == null) {
            throw new RuntimeException("请先初始化XMPPConnection连接");
        }
        return connection;
    }

    /**
     *
     * 销毁xmpp连接.
     *
     * @author shimiso
     * @update 2012-7-4 下午6:55:03
     */
    public void disconnect() {
        if (connection != null) {
            connection.disconnect();
        }
    }

    public void configure(ProviderManager pm) {

        // Private Data Storage
        pm.addIQProvider("query", "jabber:iq:private",
                new PrivateDataManager.PrivateDataIQProvider());

        // Time
        try {
            pm.addIQProvider("query", "jabber:iq:time",
                    Class.forName("org.jivesoftware.smackx.packet.Time"));
        } catch (ClassNotFoundException e) {
        }

        // XHTML
        pm.addExtensionProvider("html", "http://jabber.org/protocol/xhtml-im",
                new XHTMLExtensionProvider());

        // Roster Exchange
        pm.addExtensionProvider("x", "jabber:x:roster",
                new RosterExchangeProvider());
        // Message Events
        pm.addExtensionProvider("x", "jabber:x:event",
                new MessageEventProvider());
        // Chat State
        pm.addExtensionProvider("active",
                "http://jabber.org/protocol/chatstates",
                new ChatStateExtension.Provider());
        pm.addExtensionProvider("composing",
                "http://jabber.org/protocol/chatstates",
                new ChatStateExtension.Provider());
        pm.addExtensionProvider("paused",
                "http://jabber.org/protocol/chatstates",
                new ChatStateExtension.Provider());
        pm.addExtensionProvider("inactive",
                "http://jabber.org/protocol/chatstates",
                new ChatStateExtension.Provider());
        pm.addExtensionProvider("gone",
                "http://jabber.org/protocol/chatstates",
                new ChatStateExtension.Provider());

        // FileTransfer
        pm.addIQProvider("si", "http://jabber.org/protocol/si",
                new StreamInitiationProvider());

        // Group Chat Invitations
        pm.addExtensionProvider("x", "jabber:x:conference",
                new GroupChatInvitation.Provider());
        // Service Discovery # Items
        pm.addIQProvider("query", "http://jabber.org/protocol/disco#items",
                new DiscoverItemsProvider());
        // Service Discovery # Info
        pm.addIQProvider("query", "http://jabber.org/protocol/disco#info",
                new DiscoverInfoProvider());
        // Data Forms
        pm.addExtensionProvider("x", "jabber:x:data", new DataFormProvider());
        // MUC User
        pm.addExtensionProvider("x", "http://jabber.org/protocol/muc#user",
                new MUCUserProvider());
        // MUC Admin
        pm.addIQProvider("query", "http://jabber.org/protocol/muc#admin",
                new MUCAdminProvider());
        // MUC Owner
        pm.addIQProvider("query", "http://jabber.org/protocol/muc#owner",
                new MUCOwnerProvider());
        // Delayed Delivery
        pm.addExtensionProvider("x", "jabber:x:delay",
                new DelayInformationProvider());
        // Version
        try {
            pm.addIQProvider("query", "jabber:iq:version",
                    Class.forName("org.jivesoftware.smackx.packet.Version"));
        } catch (ClassNotFoundException e) {
        }
        // VCard
        pm.addIQProvider("vCard", "vcard-temp", new VCardProvider());
        // Offline Message Requests
        pm.addIQProvider("offline", "http://jabber.org/protocol/offline",
                new OfflineMessageRequest.Provider());
        // Offline Message Indicator
        pm.addExtensionProvider("offline",
                "http://jabber.org/protocol/offline",
                new OfflineMessageInfo.Provider());
        // Last Activity
        pm.addIQProvider("query", "jabber:iq:last", new LastActivity.Provider());
        // User Search
        pm.addIQProvider("query", "jabber:iq:search", new UserSearch.Provider());
        // SharedGroupsInfo
        pm.addIQProvider("sharedgroup",
                "http://www.jivesoftware.org/protocol/sharedgroup",
                new SharedGroupsInfo.Provider());
        // JEP-33: Extended Stanza Addressing
        pm.addExtensionProvider("addresses",
                "http://jabber.org/protocol/address",
                new MultipleAddressesProvider());

    }
}

这个类是xmpp连接的管理类，如果大家使用smack的api对这个应该不会陌生，asmack对xmpp连接的管理，与smack的差别不大，但是部分细微区别也有，我们在使用中如果遇到问题，还要多加注意，我们这里将其设计成单例，毕竟重复创建连接是个非常消耗的过程。

 

3.演示效果

   

 

很像QQ吧，没错，这是2012年版本qq的安卓界面，只是界面元素一样，实现方式大不相同，下面简单列一下这个客户端实现的功能：

1.聊天

2.离线消息

3.添加，删除好友

4.添加，移动好友分组

5.设置昵称

6.监控好友状态

7.网络断开系统自动重连接

8.收到添加好友请求消息处理

9.收到系统广播消息处理

10.查看历史聊天记录

11.消息弹出提醒，和小气泡

....

因为时间关系不是很完美，主要用于学习研究，欢迎大家给我提bug和改进意见。

 

4.源码下载

分数比较大，不是为了坑大家，是怕有伸手党出现，拿了源码出去招摇撞骗，请尊重作者原创！

 

 

 

参阅文献
Openfirehttp://www.igniterealtime.org/
push-notificationhttp://www.push-notification.org/
Claros chathttp://www.claros.org/
androidpnsourceforgehttp://sourceforge.net/projects/androidpn/
android消息推送解决方案http://www.cnblogs.com/hanyonglu/archive/2012/03/04/2378971.html
xmpp协议实现原理介绍 http://www.cnblogs.com/hanyonglu/archive/2012/03/04/2378956.html