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Android

Posted by Derrick Shepherd
Derrick Shepherd
4,861 Points

Ribbit app, SectionsPagerAdapter Issue in Android Studio...

I'm following this lesson using Android Studio, I changed the imports and followed all the instructions, but the problem i'm having is, My A.S. Build does not have the "DummyPlaceholder", I switched to eclipse and started the project over, same issue.

Here's my SectionsPagerAdapter code; The error is in the "Return" section. The PlaceholderFragment, this is what i get when i mouse over it(Cannot resolve symbol 'PlaceholderFragment')

public class SectionsPagerAdapter extends FragmentPagerAdapter {

protected Context mContext;

public SectionsPagerAdapter(Context context, FragmentManager fm) {

    super(fm);
    mContext = context;
}

@Override
public Fragment getItem(int position) {

    // getItem is called to instantiate the fragment for the given page.
    // Return a PlaceholderFragment (defined as a static inner class below).
    return PlaceholderFragment.newInstance(position + 1);
}

@Override
public int getCount() {
    // Show 2 total pages.
    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;
}

2 Answers

Peh Hui Shi
Peh Hui Shi
4,751 Points

You need to create 2 Fragment class first as you intend to have 2 fragments from getCount() method.

Use a switch statement to display appropriate fragment base on the tab user selected.

    public Fragment getItem(int position)
    {
        // getItem is called to instantiate the fragment for the given page.
        switch(position)
        {
            case 0: return new InboxFragment();

            case 1: return new FriendsFragment();

        }

        return null;
    }
Derrick Shepherd
Derrick Shepherd
4,861 Points
Derrick Shepherd
Derrick Shepherd
4,861 Points

Ok, I created the two classes and the errors went away. Thanks for the help Peh!