android – how to use getListView() in Activity?-ThrowExceptions

Exception or error:

In ListActivity is can use this.getListView().addFooterView(footerView);

but if I use Activity it can’t use this.getListView()

what should I do?

How to solve:

Whenever you use Activity you set your_layout.xml as your Activity‘s ContentView. So the ListView should b in your_layout.xml.

That ListView should have an id attribute defined in xml file say: (android:id="@+id/list").
You get your ListView object some thing like this way:

setContentView(R.layout.your_layout);
ListView list = (ListView)findViewById(R.id.list);
list.addFooterView(view);

And when you use ListActivity you get your ListView by calling method

ListView list = getListView(); // OR you can do
ListView list = (ListView)findViewById(android.R.id.list);  //consider the android prefix..

and please note that while defining any layout.xml for ListActivity you would have a ListView in your layout having id of something like this: android:id="@android:id/list"

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