堆栈管理工具类AppManager

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封装堆栈管理类AppManager

public class AppManager {

     private static Stack<Activity> activityStack = new Stack<>();
    private static AppManager instance;

    private AppManager() {
     	throw new UnsupportedOperationException("u can't instantiate me...");
    }

 	/**
     * 获取Activity栈数量
     */
    public static int getActivitySize() {
        return activityStack.size();
    }
    
    /**
     * 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();
            activity = null;
        }
    }

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

    /**
     * 结束除指定Activity之外的所有Activity
     */
    public static void finishAllActivity(Class<?> cls) {
        for (Activity activity : activityStack) {
            if (activity != null) {
                if (!activity.getClass().equals(cls)) {
                    activity.finish();
                }
            }
        }
    }

    /**
     * 结束所有Activity
     */
    public void finishAllActivity() {
        try {
            if (activityStack == null) {
                return;
            }
            for (Activity activity : activityStack) {
                if (activity != null) {
                    activity.finish();
                }
            }
            activityStack.clear();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 获取指定的Activity
     */
    public static Activity getActivity(Class<?> cls) {
        if (activityStack != null)
            for (Activity activity : activityStack) {
                if (activity.getClass().equals(cls)) {
                    return activity;
                }
            }
        return null;
    }

    /**
     * 结束除了主页其他所有Activity
     */
    public void finishOtherAllActivity() {
        try {
            for (int i = 1, size = activityStack.size(); i < size; i++) {
                if (null != activityStack.get(i)) {
                    activityStack.get(i).finish();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


    /**
     * 从堆栈中移除指定Activity
     *
     * @param activity
     */
    public void remove(Activity activity) {
        if (activityStack.size() > 0 && activity == activityStack.peek())
            activityStack.pop();
        else
            activityStack.remove(activity);
    }

    /**
     * 退出应用程序
     */
    public void AppExit(Context context) {
        try {
            finishAllActivity();
            ActivityManager activityMgr = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
            if (android.os.Build.VERSION.SDK_INT < 8) {
                activityMgr.restartPackage(context.getPackageName());
            } else {
                activityMgr.killBackgroundProcesses(context.getPackageName());
            }
            System.exit(0);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}