activity 页面管理类

public class AppManager {

private static Stack<Activity> activityStack;
private static AppManager instance;

private AppManager() {
}

/**
 * 单一实例
 */
public static AppManager getAppManager() {
    if (instance == null) {
        instance = new AppManager();
    }
    return instance;
}

/**
 * 添加Activity到堆栈
 */
public void addActivity(Activity activity) {
    if (activityStack == null) {
        activityStack = new Stack<Activity>();
    }
    activityStack.add(activity);
}

/**
 * 获取当前Activity（堆栈中最后一个压入的）
 */
public Activity currentActivity() {
    Activity activity = activityStack.lastElement();
    return activity;
}

/**
 * 结束当前Activity（堆栈中最后一个压入的）
 */
public void finishActivity() {
    Activity activity = activityStack.lastElement();
    finishActivity(activity);
}

/**
 * 结束指定的Activity
 */
public void finishActivity(Activity activity) {
    if (activity != null) {
        activityStack.remove(activity);
        activity.finish();
    }
}

/**
 * 结束指定类名的Activity
 */
public void finishActivity(Class<?> cls) {
    for (Activity activity : activityStack) {
        if (activity.getClass().equals(cls)) {
            finishActivity(activity);
        }
    }
}

/**
 * 结束所有Activity
 */
public void finishAllActivity() {
    if(activityStack == null || activityStack.size() == 0){
        return;
    }
    for (int i = 0, size = activityStack.size(); i < size; i++) {
        if (null != activityStack.get(i)) {
            activityStack.get(i).finish();
        }
    }
    activityStack.clear();
}

/**
 * 结束除了主页以外的页面
 */
public void finishSubActivity(){
    for (int i = 0, size = activityStack.size(); i < size; i++) {
        if (!(activityStack.get(i) instanceof MainActivity)) {
            activityStack.get(i).finish();
        }
    }
}

/**
 * 结束除了 参数 以外的页面
 */
public void finishSubActivity(Class<?> cls){
    for (int i = 0, size = activityStack.size(); i < size; i++) {
        if (!(activityStack.get(i).getClass().equals(cls) )) {
            activityStack.get(i).finish();
        }
    }
}

public Activity findActivity(Class<?> cls){
    for (Activity activity : activityStack) {
        if (activity.getClass().equals(cls)) {
            return activity;
        }
    }
    return null;
}

/**
 * 退出应用程序
 */
public void AppExit(Context context) {
    try {
        finishAllActivity();
        ActivityManager activityMgr = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        activityMgr.restartPackage(context.getPackageName());
        System.exit(0);
    } catch (Exception e) {
    }
}

public void restartApp(Context context){
    Intent intent = context.getPackageManager()
            .getLaunchIntentForPackage(context.getPackageName());
    PendingIntent restartIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_ONE_SHOT);
    AlarmManager mgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
    mgr.set(AlarmManager.RTC, System.currentTimeMillis() + 1000, restartIntent); // 1秒钟后重启应用
    System.exit(0);
}

}