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Android中保存当前按钮的状态按back键返回之后再次进入没有改变

一、使用SharedPreferences类，把用户操作记录保存到里面。因为是按钮的状态，所以在点击事件里面保存用户的操作数据。获取用户的点击位置，和点击后的发生改变的值。@Override public void OnItemHiddenClick(View view, int position)...

【Android Demo】点击两次Back键退出当前程序

应用场景：点击两次Back键退出当前程序效果图: 实现原理：onKeyDown（）会捕获当前点击事件，如果当前keyCode等于BACK事件值就会执行ToQuitTheApp（）方法。在ToQuitTheApp（）方法中，首先判断isExit的值，如果为false的话，则置为true，同时会弹出提...

开源Android容器化框架Atlas开发者指南

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Android--Task和BackStack高级

开始一个Task 　　之前已经了解到，Android的Task通常起始于HOME页面下点击应用程序图标或其在桌面快捷图标。所以我们在开发一个应用程序的时候，需要指定应用程序的入口Activity，通过在AndroidManifest.xml清单文件中某个<Activity/>标签内，使用...

【iOS-cocos2d-X 游戏开发之十五】Cocos2dx中响应Android的Back与Menu&释放粒子内存

本篇介绍两个常用知识，一个是粒子的自动释放机制函数，因为不少童鞋说cocos2dx为什么没有？其实是没找到，这里特意拿出来说下！另外一个是如何响应Android的Menu菜单和Back返回事件的方法；首先对于Cocos2dx中对于粒子自动释放的函数Himi这里给出，不少童鞋都在群里或...

android 处理Back键按下事件

package com.example.keyevent; import android.os.Bundle; import android.view.KeyEvent; import android.app.Activity; /** * Demo描述: * 处理Back键按下事件 * * 注意事...

android之Task和Back Stack(回退栈)

通常一个应用程序包括多个Activity，我们在使用程序是，一个Activity到另一个Activity，又到别的Activity，然后我们按下返回键又能按打开的顺序，倒叙返回。android中是怎么做到的？Task和Back Stack与此密不可分。 Task存储了一组页面的集合，并且这个集合会被...

Android Action Bar 加入Back键

在Action Bar加入Back键或者其他功能, 看看效果. 代码非常简单 1 2 3 /*显示App icon左侧的back键*/ ActionBar actionBar = getActionBar(); actionBar.setDisplayHomeAsUpEnabled(true); 然...

Android -- Handling back button press Inside Fragments

干货（1）首先创建一个抽象类BackHandledFragment，该类有一个抽象方法onBackPressed()，所有BackHandledFragment的子类在onBackPressed方法中处理各自对Back事件的消费逻辑。onBackPressed返回布尔值，宿主FragmentAct...

Android back键及backWebview模式跳转详解

首先，来看一下关于Android home键和back键区别 back键 Android的程序无需刻意的去退出,当你一按下手机的back键的时候，系统会默认调用程序栈中最上层Activity的Destroy()方法来，销毁当前Activity。当此Activity又被其它Activity启动起来的时...

为什么Android实现按back退出时要这样判断

f (event.getAction()==KeyEvent.ACTION_DOWN&&event.getKeyCode() == KeyEvent.KEYCODE_BACK) { 为何要&&ACTION_DOWN？？一个判断居然不行

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