Question

I have a FragmentActivity which sets a main layout with 3 tabs. Each tab has it’s own fragment which inflates is own layout into main layout.

For example, one of the three Fragments:

public class Fragment1 extends Fragment {

  public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState) {
    if (container == null) {
            return null;
        }
    return inflater.inflate(R.layout.fragment1, container, false);
  }
}

When I add all the fragments and connect them with tabs everything works. When I click on tab1, layout of the Fragment1 shows, when I click on Tab2, layout of the Fragment2 shows.

The problem is that when I want to change something in that inflated layout (for example execute setText to textView in fragment1 layout), I receive a NullPointerException in that line and application stops.

This doesn’t work:

 TextView test = (TextView) findViewById(R.id.fragmentOneText1);
 test.setText("Test text!");

How to set data to inflated layout?

Answer 1

You have to inflate your fragment specific layout first by using LayoutInflater and map the control in your Fragment

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        View fragmentView = inflater.inflate(R.layout.R.layout.fragment1, container, false);
        TextView text = (TextView) fragmentView.findViewById(R.id.fragmentOneText1);
        mTextNoResult=(TextView)fragmentView.findViewById(R.id.text_noresult);
        return fragmentView;
}