CODEWITHSUNDEEP
javaandroid
ErinSKabbash
ErinSKabbash

Reputation: 389

Android Java Return Type Error

I am new to Android and following some tutorials online. However, fragments appeared to have changed since the tutorial was published. Now I am stuck on an error that I cannot seem to resolve. I am getting the error "The return type is incompatible with FragmentPagerAdapter.getItem(int)" on the return type of the getItem method. Any idea why? If I change the return type to FriendsFragment, I get the same error. If I change the return type to Fragment then I get errors inside the method. Please help! Thanks in advanced. Here is my code: 

package com.erinkabbash.ribbit;

import java.util.Locale;

import android.app.Fragment;
import android.app.FragmentManager;
import android.content.Context;
import android.support.v13.app.FragmentPagerAdapter;
import android.support.v4.app.ListFragment;

/**
 * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
 * one of the sections/tabs/pages.
 */
public class SectionsPagerAdapter extends FragmentPagerAdapter {

    protected Context mContext;

    public SectionsPagerAdapter(Context context, FragmentManager fm) {
        super(fm);
        mContext = context;
    }

    @Override
    public InboxFragment getItem(int position) {
        // getItem is called to instantiate the fragment for the given page.
        // Return a PlaceholderFragment (defined as a static inner class
        // below).

        switch(position){
            case 0:
                return new InboxFragment();
            case 1:
                return new FriendsFragment();
        }

        return null;
    }

    @Override
    public int getCount() {
        return 2;
    }

    @Override
    public CharSequence getPageTitle(int position) {
        Locale l = Locale.getDefault();
        switch (position) {
            case 0:
                return mContext.getString(R.string.title_section1).toUpperCase(l);
            case 1:
                return mContext.getString(R.string.title_section2).toUpperCase(l);

        }
        return null;
    }
}

Upvotes: 0

Views: 147

Answers (3)

ppuskar
ppuskar

Reputation: 771

Is your class InboxFragment and FriendsFragment extends Fragment(android.support.v4.app.Fragment) ? android.support.v4.app.Fragment and android.app.Fragment are not compatible to each other and FragmentPagerAdapter supports android.support.v4.app.Fragment only. Give it a try, it should work..

Upvotes: 1

Rod_Algonquin
Rod_Algonquin

Reputation: 26198

You are returning a type InboxFragment and int the line of code return new FriendsFragment(); it wont accept it because it is not a type of InboxFragment but it is a type of Fragment so instead of returning InboxFragment from the getItem method change it to Fragment

example:

    public Fragment getItem(int position) {

Upvotes: 1

Gabe Sechan
Gabe Sechan

Reputation: 93559

You can't do an override unless the signature matches exactly. Change getItem from returning InboxFragment to returning Fragment.

Upvotes: 3

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