Kotlin : Cannot find symbol class Fragment or other android classes

Question

I have a java fragment with viewPager in it..

public class FragmentWithViewPager extends Fragment {

    private class ViewPagerAdapter extends FragmentStatePagerAdapter {

        ViewPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int i) {
            Fragment fragment = new DeshFalView(); //<-- Problem here
            Bundle args = new Bundle();
            args.putInt("index", i);
            fragment.setArguments(args);
            return fragment;
        }

    }
}

Now I have another fragment which will be populated inside the above fragment and is written in kotlin like this :

class DeshFalView : Fragment(), DeshfalContract.View {
    //More code...
}

I do not get any lint warning or error but when I try to run the app:

But I get a error :

Error:(79, 37) error: cannot find symbol class DeshFalView

in the highlighted line above .. those two classes are inside same package as shown below

Thanks in advance ...

Please, show your folder structure. – Pedro Paulo Amorim May 29 '17 at 17:35 — Pedro Paulo Amorim, May 29 '17 at 17:35
I have edited with the folder structure – erluxman May 29 '17 at 17:38 — erluxman, May 29 '17 at 17:38

erluxman · Accepted Answer · 2018-05-23T17:08:37.427

46

Problem : I made a stupid mistake that I forgot to apply kotlin-android plugin

Solution : On the top of app gradle file paste :

apply plugin: 'kotlin-android'

edited May 23 '18 at 17:08

answered May 30 '17 at 03:08

erluxman

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score 1 · Answer 2 · answered Feb 15 '21 at 12:11

Sometimes I had this kind of error even when this:

apply plugin: 'kotlin-android'

was in my app gradle.

The solution is to delete the app/build directory. This folder is auto generated so there will be no problems deleting it.

Hope this will help somebody.

Kotlin : Cannot find symbol class Fragment or other android classes

2 Answers2