activity管理类

package com.xinchuang.buynow.util;

import android.app.Activity;
import android.content.Context;

import java.util.Stack;

/**
* 应用程序Activity管理类：用于Activity管理和应用程序退出
* Created by 123 on 17/3/1.
*/
public class ActivityManager {
private static Stack<Activity> activityStack = new Stack<Activity>();

/**
* 添加Activity到堆栈
*/
public static void addActivity(Activity activity) {
activityStack.push(activity);
}

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

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

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

/**
* 结束所有Activity
*/
public static void finishAllActivity() {
for (Activity activity : activityStack) {
if (activity != null) {
activity.finish();
}
}
activityStack.clear();
}

/**
* 退出应用程序
*/
public static void AppExit(Context context) {
try {
finishAllActivity();
android.app.ActivityManager manager = (android.app.ActivityManager) context
.getSystemService(Context.ACTIVITY_SERVICE);
manager.killBackgroundProcesses(context.getPackageName());
System.exit(0);
} catch (Exception e) {
e.printStackTrace();
}
}
}