CODEWITHSUNDEEP
androidandroid-fragments
Mike Baxter
Mike Baxter

Reputation: 7268

Use view from fragment xml file

I have an activity with several tabs (using the 'fixed tabs + swipe' style). Each tab layout is defined as a fragment xml file.

Eg, my activity is called ModifyCustActivity. This uses an almost-empty xml file called activity_modify_cust.xml. Each tab on this page is represented by various xml files such as fragment_modify_cust_basic and fragment_modify_cust_address etc etc. Each of these fragment xml files contains EditTexts, Spinners and more.

When the activity starts, I need to be able to access these views from the activity code, as I need to pre-populate them, and get their results once they are edited. However, because these views exist in a fragment xml file, I don't seem to be able to reach them in code. Is there a way to access a view contained in a fragment xml file?

Upvotes: 2

Views: 4202

Answers (2)

Andy Res
Andy Res

Reputation: 16043

Is there a way to access a view contained in a fragment xml file?

Yes it is, but your fragment should be declared in the XML layout file, which seems to be your case.

For example:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              ...">

    <fragment
            android:name="com.example.MyFragment"
            android:id="@+id/my_fragment"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>

</LinearLayout>

And you would access the fragment like this:

FragmentManager manager = getSupportFragmentManager();
MyFragment fragment = (MyFragment)manager.findFragmentById(R.id.my_fragment);

Then using the fragment instance you could further access your views, for example by calling a public method from the fragment which updates some particular view.

UPDATE:
Suppose you have a TextView that appears in layout of the fragment, and need to update from the activity.

Let this be the fragment class: 

public class MyFragment extends Fragment{

    private TextView textView;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view =  inflater.inflate(R.layout.fragment_layout, null, false);
        textView = (TextView)view.findViewById(R.id.textView);
        return view;
    }

    public void updateTextView(String text){
        textView.setText(text);
    }
}

Then you would update the TextView by calling in your activity the updateTextView() method:

fragment.updateTextView("text");

Upvotes: 3

barisemreefe
barisemreefe

Reputation: 434

You can reach fragments views from activity. If you want to send a data from fragment to another fragment. Your sender fragment must communicate with activity and your activity can manipulate the view in other fragment

http://developer.android.com/training/basics/fragments/communicating.html

Upvotes: 0

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