ListView setAdapter（）NullPointer异常（使用Inflater）

Question

I want to populate a ListView from an ArrayList, here is my code:

rootView = inflater.inflate(R.layout.verein_layout, container, false);

ListView veaList = (ListView)getView().findViewById(R.id.veaList);
ArrayList<String> items = new ArrayList<String>();

The items get filled in here... then this code:

ListAdapter adapter = new ArrayAdapter(inflater.getContext(),
android.R.layout.simple_list_item_2, android.R.layout.simple_list_item_1, items);

veaList.setAdapter(adapter);

Unfortunately, the code throws a NullPointerException. What do I do wrong?

Thanks in advance,

forumfresser

Answer 1

Try this..

Change the below line

ListView veaList = (ListView)getView().findViewById(R.id.veaList);

as

ListView veaList = (ListView) rootView.findViewById(R.id.veaList);

because getView() returns the view as null that's why that error . So you should use rootView because that the main view....

Answer 2

getView()返回您已放大并在onCreateView内部返回的视图，因此在onCreateView内使用它是错误的，因为它尚不可用。

Answer 3

Just try this one...

ListAdapter adapter = new ArrayAdapter(inflater.getContext(),
android.R.layout.simple_list_item_2, items);