Content view not yet created

Question

I am trying to retrieve the data from mysql and sort it based on the category tab. My application crash when i open the activity with content view not yet created. May I know wh

Answer 1

You can't call getListView() in the onCreateView() because the ListView doesn't exist yet. You need to put that code inside onViewCreated().

Answer 2

You can avoid crash by using check

if(this.isAdded())   

if you debug that part BooksFragment.getListView int the moment of exception - you will notice it's not exist.

Answer 3

onCreateView must only return the view that represent the fragment. Other operations on the View should be performed in another callback, onViewCreated:

  @Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {       
      return inflater.inflate(R.layout.list_fragment, container, false);
 }

 @Override 
 public void onViewCreated (View view, Bundle savedInstanceState) {
       productsList = new ArrayList<Products>();

lv = getListView();

// on seleting single product
// launching Edit Product Screen
lv.setOnItemClickListener(new OnItemClickListener() {

    @Override
    public void onItemClick(AdapterView<?> parent, View view,
            int position, long id) {
        // getting values from selected ListItem
        String pid = ((TextView) view.findViewById(R.id.pid)).getText()
                .toString();
        String name = ((TextView) view.findViewById(R.id.name))
                .getText().toString();
        String description = ((TextView) view.findViewById(R.id.des))
                .getText().toString();
        String price = ((TextView) view.findViewById(R.id.budget))
                .getText().toString();
        String date = ((TextView) view.findViewById(R.id.date_posted))
                .getText().toString();
        String category = ((TextView) view.findViewById(R.id.category))
                .getText().toString();
        String email = ((TextView) view
                .findViewById(R.id.email_request)).getText().toString();
        String contact = ((TextView) view
                .findViewById(R.id.contact_request)).getText()
                .toString();

        // Starting new intent
        Intent in = new Intent(getActivity(), DisplayItemInfo.class);
        // sending information to next activity
        in.putExtra(TAG_PID, pid);
        in.putExtra(TAG_NAME, name);
        in.putExtra(TAG_DES, description);
        in.putExtra(TAG_BUDGET, price);
        in.putExtra(TAG_DATE_POSTED, date);
        in.putExtra(TAG_CATEGORY, category);
        in.putExtra(TAG_EMAIL, email);
        in.putExtra(TAG_CONTACT, contact);
        startActivity(in);
    }
});

new LoadAllProducts().execute();
 }