Android : How do I update my textView in a Fragment

android, android-fragments, dynamic, textview

Solution

You need to assign the inflated fragment layout to a variable so that you can access its `findViewById()` method. Then you return it once you're done updating your widgets.

@Override
public View onCreateView(LayoutInflater inflater,
        ViewGroup container, Bundle savedInstanceState){
    // -- inflate the layout for this fragment
    View myInflatedView = inflater.inflate(R.layout.fragmentmt, container,false);

    // Set the Text to try this out
    TextView t = (TextView) myInflatedView.findViewById(R.id.viewItem);
    t.setText("Text to Display");

    return myInflatedView;
}

Normally, when you call `findViewById()` within an `Activity`, you're invoking `Activity.findViewById()`. Trying the same call within your `Fragment` class will fail because there is no such `Fragment.findViewById()` method. So, you must use `View.findViewById()` with your inflated view to obtain references to your widgets.

Problem

I am trying to use fragments to build my first proper Android App. I have a main xml. which consists of two vertical fragments, the top fragments consists of just two TextViews. The first of these contains static text and the second contains a value which I will eventually be getting dynamically from SQL. If i put this is my MainActivity.java then it happily updates the value of the TextView in my first Fragment: ``` public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Set the Text to try this out TextView t = (TextView)findViewById(R.id.viewItem); t.setText("Text to Display"); } ``` I have two fragment XMLs and a java to support each so I want to put the setting of this field into the Java that supports the fragment rather than the java that is for the MainActivity. When I put it in the fragment it looks like this:- ``` public class FragmentMainTop extends Fragment { @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){ // -- inflate the layout for this fragment return inflater.inflate(R.layout.fragmentmt, container,false); // Set the Text to try this out TextView t = (TextView)findViewById(R.id.viewItem); t.setText("Text to Display"); } ``` But if I do this I get an error on the TextView line: "The method findViewById(int) is undefined for the type FragmentMainTop" So why does it not know this method? I have ctl/shift/o so I know I have all the right imports. I don't want to end up putting all my code in the MainActivity because if I want to then use the Fragment in another activity I will have to repeat all the code.

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