应用程序开始类

package com.callbin.domo;

import java.util.ArrayList;
import android.app.Activity;
import android.app.Application;

public class CallbinApplication extends Application {

    public static CallbinApplication instance;// 实例化一个app合
    public static String sessionkey=null;
    public static String sessionid=null;
    public static Integer accountNum=null;
    /**
     * 打开Activity的记录
     */
    private ArrayList<Activity> activitylist;

    @Override
    public void onCreate() {
        // TODO Auto-generated method stub
        instance = this;
        activitylist = new ArrayList<Activity>();
        super.onCreate();
    }

    // 退出处理
    @Override
    public void onTerminate() {
        // TODO Auto-generated method stub
        for (Activity activity : activitylist) {
            activity.finish();
        }
        super.onTerminate();

    }

    /**
     * 获取一个Application实例
     * 
     * @return 返回一个application实例
     */
    public static CallbinApplication getCallbinApplication() {
        return instance;
    }
    /**
     * 添加一个activity
     * 
     * @param activity
     */
    public static void addActivity(Activity activity) {
        instance.activitylist.add(activity);
    }

    /**
     * 从列表中删除一个Activity
     */
    public static void deleteActivity(Activity activity) {
        instance.activitylist.remove(activity);
    }

}

应用程序开始

 <application
        android:name=".CallbinApplication"
        android:icon="@drawable/mt_ic"
        android:label="@string/app_name"
        android:theme="@android:style/Theme.NoTitleBar" >
        <activity
            android:name=".activity.LoginActivity"
            android:screenOrientation="portrait" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</application>