findViewById in Fragment

user_813057 0
Viewed 737259

I am trying to create an ImageView in a Fragment which will refer to the ImageView element which I have created in the XML for the Fragment. However, the findViewById method only works if I extend an Activity class. Is there anyway of which I can use it in Fragment as well?

public class TestClass extends Fragment {
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        ImageView imageView = (ImageView)findViewById(R.id.my_image);
        return inflater.inflate(R.layout.testclassfragment, container, false);
    }
}

The findViewById method has an error on it which states that the method is undefined.

findviewbyid android-fragments android-imageview android
37 Answers

Inside Fragment class we get onViewCreated() override method where we should always initialize our views because in this method we get view object. Using this object we can find our views like below:

class MyFragment extends Fragment {
    private ImageView imageView;

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

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        //initialize your view here for use view.findViewById("your view id")
        imageView = (ImageView) view.findViewById(R.id.my_image);
    }
}
user_108352870

You can override onViewCreated() which is called right after all views had been inflated. It's the right place to fill in your Fragment's member View variables. Here's an example:

class GalleryFragment extends Fragment {
    private Gallery gallery;

    (...)

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        gallery = (Gallery) view.findViewById(R.id.gallery);
        gallery.setAdapter(adapter);
        super.onViewCreated(view, savedInstanceState);
    }
}
user_1871160

1) first inflate layout of Fragment then you can use findviewbyId .

View view = inflater.inflate(R.layout.testclassfragment, container, false);
             ImageView imageView = (ImageView) view.findViewById(R.id.my_image);
             return view;
user_76028090

Note :

From API Level 26, you also don't need to specifically cast the result of findViewById as it uses inference for its return type.

So now you can simply do,

public View onCreateView(LayoutInflater inflater, 
                         ViewGroup container, 
                         Bundle savedInstanceState) {
     View view = inflater.inflate(R.layout.testclassfragment, container, false);
     ImageView imageView =  view.findViewById(R.id.my_image); //without casting the return type
     return view;
}
user_73377230

I like everything to be structured. You can do in this way.

First initialize view

private ImageView imageView;

Then override OnViewCreated

@Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        findViews(view);
    }

Then add a void method to find views

private void findViews(View v) {
    imageView = v.findViewById(R.id.img);
}
user_142434250 
//here you can do it by
   public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState)
  {
    // Inflate the layout for this fragment
    final View view =  inflater.inflate(R.layout.fragment_apple, container, 
 false);
    ist = view.findViewById(R.id.linearLink);
    second = view.findViewById(R.id.linearPhone);
    return view;
user_153134290 
ImageView imageView;
public View onCreateView(LayoutInflater inflater, 
                     ViewGroup container, 
                     Bundle savedInstanceState) {
 View view = inflater.inflate(R.layout.testclassfragment, container, false);
 imageView = view.findViewById(R.id.my_image);
 return view;

}

user_168128670

getView() works only after onCreateView() completed, so invoke it from onPostCreate():

@Override
public void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    ImageView imageView = (ImageView) getView().findViewById(R.id.foo);
}
user_2181520

Very simple way to do: 

 @Nullable
        @Override
        public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
            View fragmentView = inflater.inflate(R.layout.testclassfragment, container, false);
            ImageView imageView = (ImageView)fragmentView.findViewById(R.id.my_image);
            return fragmentView;
       }
user_39142600
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