Cannot resolve method 'findViewById(int)' in Fragment of ViewPager

Question

Hello, I have a Fragment for a ViewPager:

package my.test.myapplication;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

public class Fragment1 extends Fragment {

    private Button btn;
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // point A
        return  inflater.inflate(R.layout.frag1,container,false);
    }
}

When I would add this under point A, it comes a error message:

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    // point A
    btn = (Button) findViewById(R.id.button);
    return  inflater.inflate(R.layout.frag1,container,false);
}

The error message:

Cannot resolve method 'findViewById(int)'

What can I do?

in fragment it is a inflated layout hence it can be found through inflated view so use view.findViewById() where view= inflater.inflate(R.layout.frag1,container,false); — Shashwat Gupta, Aug 31 '17 at 09:35
Don't use Fragment if you are beginner (I assume that you are). — Nguyễn Hoài Nam, Aug 31 '17 at 09:36
When you get 7 answers in as many minutes, it's a sure sign that you didn't do enough research on your issue. — Mike M., Aug 31 '17 at 09:43

score 3 · Accepted Answer · answered Aug 31 '17 at 09:42

If you want to access any view, you have view object to access it.

  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
          View view =   inflater.inflate(R.layout.frag1,container,false);
         btn = (Button)view.findViewById(R.id.button);

       return view;
   }

AskNilesh · Answer 2 · 2017-08-31T09:49:44.130

1

try this if want to bind your controls in fragment than your have to first get the your layout in to a view using LayoutInflater than with the help of that view you can bind your all controls like this

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.frag1,container,false);
        btn = (Button) rootView.findViewById(R.id.button);
        return rootView  ;
    }

edited Aug 31 '17 at 09:49

answered Aug 31 '17 at 09:36

AskNilesh

63,753
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I had saved you c: – Pavel Savchkov Aug 31 '17 at 09:38
and may know the reason for down votes – AskNilesh Aug 31 '17 at 09:43
The only problem that I see is a missed "=" – Pavel Savchkov Aug 31 '17 at 09:44
TBH all answers here are wrong, because everyone should use ButterKnife. – Pavel Savchkov Aug 31 '17 at 09:45
3

@PavelSavchkov. Using ButterKnife is something that a developer might prefer, but that doesn't make other answers wrong – 0xDEADC0DE Aug 31 '17 at 09:47
@0xDEADC0DE C'mon, that's just kind of joke. On the other hand, I really recommend ButterKnife for everyone. It makes the code a lot cleaner. – Pavel Savchkov Aug 31 '17 at 09:49
1

@PavelSavchkov. I'm fine with that, but there are users around here, like OP, that have no clue about what they're doing and they might not see your comment as a joke. They might really think that the other answers are wrong although they are clearly not – 0xDEADC0DE Aug 31 '17 at 09:53
@0xDEADC0DE Tbh, I just don't realize why the people can't just use google for a such simple problem. It's just like: "Oh, ok let just someone else solve the problem". I think that it's not how anyone should learn programming or even whatever. – Pavel Savchkov Aug 31 '17 at 10:01
@PavelSavchkov. I agree with you on that. Especially questions like these. – 0xDEADC0DE Aug 31 '17 at 10:12

score 0 · Answer 3 · answered Aug 31 '17 at 09:35

0

Try below code in OnViewCreated() method:

btn = (Button) view.findViewById(R.id.button);

answered Aug 31 '17 at 09:35

nivesh shastri

420
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score 0 · Answer 4 · answered Aug 31 '17 at 09:36

0

Try that

 view.findViewById(R.id.expandable);

answered Aug 31 '17 at 09:36

Harshit Trivedi

726
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Vishal Vaishnav · Answer 5 · 2017-08-31T09:43:43.067

0

You can try like this:

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) 
{
  View rootView = inflater.inflate(R.layout.frag1, container, false);
  btn = (Button)rootView.findViewById(R.id.button);
  return  rootView ;
}

edited Aug 31 '17 at 09:43

answered Aug 31 '17 at 09:36

Vishal Vaishnav

3,208
2
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score 0 · Answer 6 · answered Aug 31 '17 at 09:42

0

A Fragment is not a subclass of Activity.

You have to call findViewById(R.id.*id*); on a Activity object.

See API.

answered Aug 31 '17 at 09:42

t00manysecrets

1
2

Cannot resolve method 'findViewById(int)' in Fragment of ViewPager

6 Answers6