adapter

My goal is to display the list of installed apps in a custom listview (within an Activity ) without checkbox getting unchecked (when listview is scrolled). The Problem : When Listview is scrolled, the checked status of the checkbox becomes unchecked. My Progress So Far : While this blog entry clearly shows how to get rid of the problem of checkboxes in listview getting unchecked, the difference is that it uses Model as the custom class whereas in my case it is a system class [i.e. the packageList1 = packageManager.getInstalledPackages(0);] How can I resolve this? Below is my code attempt. I am

I'm curious about the purpose of the methods getItem and getItemId in the class Adapter in the Android SDK. From the description, it seems that getItem should return the underlying data. So, if I have an array of names ["cat","dog","red"] and I create an adapter a using that, then a.getItem(1) should return "dog", correct? What should a.getItemId(1) return? If you've made use of these methods in practice, could you provide an example? binnyb I see these methods as a cleaner approach to accessing my list's data. Instead of directly accessing my adapter object via something like myListData.get

意图 把一个类的接口变换成客户端所期待的另一种接口，从而使原本接口不匹配而无法在一起工作的两个类能够在一起工作。 IGame | GameAdapter--->Game 每次要调用的时候，就调用GameAdapter的方法，但是GameAdapter内部，其实有一个对Game的引用，调用GameAdapter的实质，就是调用Game的方法. IGame接口就是适配器模式中的目标角色，这是客户所期待的接口。也是针对老的游戏程序所遵循的接口。 GameAdapter类是适配器角色，它是适配器模式的核心，用于把源接口转变为目标接口。在这里，我们看到，它实现目标接口。 问题：为什么不直接用Game实现IGame呢？ 何时采用 l 从代码角度来说， 如果需要调用的类所遵循的接口并不符合系统的要求或者说并不是客户所期望的，那么可以考虑使用适配器。 l 从应用角度来说， 如果因为产品迁移、合作模块的变动，导致双方一致的接口产生了不一致，或者是希望在两个关联不大的类型之间建立一种关系的情况下可以考虑适配器模式。 适配器模式和Facade的区别是，前者是遵循接口的，后者可以是不遵循接口的，比较灵活。 适配器模式和Proxy的区别是，前者是为对象提供不同的接口，或者为对象提供相同接口，并且前者有一点后补的味道，后者是在设计时就会运用的。 代码： using System; using System

We're doing a project coded in Java (compiled for JRE 1.6) and need some help with a little but apparently complicated feature: We want to do a certain action when a specific wireless network is connected e.g. when the connected SSID=="myNetworkAtHome" or similar. After looking through this site, google and the Java documentation we have come a little closer. After looking at the code here: http://download.oracle.com/javase/tutorial/networking/nifs/retrieving.html It seems we were getting close but it hits a deadend, all the interfaces seems to be connected to "net0" through "net13" (on my