error: cannot find symbol method findViewById(int)

Question

this is the fragmentOne.java
package piestudio.opinion;

import android.app.Fragment;
import android.app.FragmentManager;
import android.os.Bundle;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.view.MenuItem;

/**
 * Created by jene on 7/4/2016.
 */
public class FragmentOne extends Fragment{
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        final NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener( new NavigationView.OnNavigationItemSelectedListener(){

            public boolean onNavigationItemSelected(MenuItem Item){
              int id = Item.getItemId();

            if( id  == R.id.toi) {
                DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
                FragmentOne FragmentOne = new FragmentOne();
                FragmentManager.beginTransaction()
                        .add(R.id.content_frame,FragmentOne,"Times of India")
                        .commit();
                drawer.closeDrawer(navigationView);
            }
                DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
                drawer.closeDrawer(GravityCompat.START);
                return true;
            }
        });
    }
}

i am getting these errors

Error:(19, 64) error: cannot find symbol method findViewById(int) Error:(27, 54) error: cannot find symbol method findViewById(int) Error:(29, 32) error: non-static method beginTransaction() cannot be referenced from a static context Error:(37, 54) error: cannot find symbol method findViewById(int)

As this class is fragment you dont have layout resource in your onCreate method. layout created after your onCreateView where you are creating view. Below is fragment life cycle.https://developer.android.com/guide/components/fragments.html#Creating — Drup Desai, Jul 08 '16 at 10:07

score 4 · Answer 1 · edited Jan 25 '19 at 11:52

4

Fragment haven't method

findViewById

You need getView() and use that method. Check this findViewById in Fragment

So change the line to:

final NavigationView navigationView = (NavigationView) getView().findViewById(R.id.nav_view);

Plus in fragments work with view should be in/after onCreateView method of fragment life-cycle after inflating fragment's layout.

edited Jan 25 '19 at 11:52

Marcel Hofgesang

951
1
15
36

answered Jul 08 '16 at 10:07

Stanislav Parkhomenko

499
5
18

`getView()` can be `null` in `onCreateView()`. In this case use `view.findViewById(R.id.nav_view);` (where `view = inflater.inflate(...)`). – CoolMind Jan 25 '19 at 11:54

score 2 · Answer 2 · answered Jul 08 '16 at 10:09

2

You can do like this :

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    View content = view.findViewById(R.id.content);
}

answered Jul 08 '16 at 10:09

Ben-J

1,084
8
24

score 0 · Answer 3 · answered Jul 08 '16 at 10:10

Change below line one by one

Step 1 :

 final NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);

to this

 final NavigationView navigationView = (NavigationView)getView().findViewById(R.id.nav_view);

Step 2 :

  DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);

to this

 DrawerLayout drawer = (DrawerLayout)getView().findViewById(R.id.drawer_layout);

Step 3 :

Change this

DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);

to this

DrawerLayout drawer = (DrawerLayout)getView().findViewById(R.id.drawer_layout);

Use getView(). This will return the root view for the fragment, with this you can call findViewById().

score 0 · Answer 4 · answered Jul 08 '16 at 10:15

Do it like this,

     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        ViewGroup root = (ViewGroup) inflater.inflate(R.layout.visited_task, null);

 final NavigationView navigationView = (NavigationView) root.findViewById(R.id.nav_view);

return root;

error: cannot find symbol method findViewById(int)

4 Answers4