How to clear the views which are held in the ListView's RecycleBin?

android 的listview 控件，我自己使用了converview来进行缓存设置（不懂什么是convertview的请自行百度），但是发现在某些情况下会有问题。具体而言，我的问题是这样的：我需要点击一下listview的某一项，此时需要更新数据，让listview显示新的数据。而此时，由于缓存的设置，会导致更新并没有办法显示，这个时候调用notifyDataSetChanged是没有效果的。所以我们需要将缓存清除。

而我找了很久，都没有发现可以清除缓存的方法。有人说用invalidate方法，但是经过测试也没有用。

这个时候看到有人说重新设置一下adapter就可以清除缓存了，发现还是不行

Calling invalidate() or invalidateViews() did not do the trick for me (as mentioned in the correct answer). The recycled views were still stored in the ListView. I had to dig in Android source code to find a solution. I checked many methods, including the setAdapter() method of the ListView class (Android API 15) :

@Overridepublic void setAdapter(ListAdapter adapter) {    // ...    mRecycler.clear();    // ...}

As you noticed, setting an adapter clears the recycler, which holds all the recycled views in a list view. You do not have to create a new adapter, setting the same adapter is enough to clear the recycled views list in the list view :

Adapter adapter = listview.getAdapter ();// ... Modify adapter ... do anything else you need to do// To clear the recycled views list :listview.setAdapter ( adapter );

在我的项目中，adapter是作为全局变量的，所以我是这样使用的：

adDeviceList.setList(MainService.mainService.nowResult);
lvDevices.setAdapter(adDeviceList);

最后发现还是没有效果

最后我把2种方法放在一起，居然解决了...看来这2个都要设置才可以清除缓存

lvDevices.invalidateViews();
adDeviceList.setList(MainService.mainService.nowResult);
lvDevices.setAdapter(adDeviceList);