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Android Build a Self-Destructing Message Android App Using Fragments for Tabs Modifying Tabs from the Template

Benjamin Earle
Benjamin Earle
6,204 Points
Posted by Benjamin Earle
Benjamin Earle
6,204 Points

Error with placeholderFragment, AndroidStudio

@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);
    }

In this part (in the video it shows a dummy fragment) I get an error for the PlaceholderFragment object, it shows that it "Cannot resolve symbol". If I use the quick fix, theres another error where it doesen't return what getItem needs.

1 Answer

Tyrel Hiebert
Tyrel Hiebert
14,739 Points
Tyrel Hiebert
Tyrel Hiebert
14,739 Points

I struggled with this for a few hours. Finally, Ben's answer here really helped me.

Make sure in your MainActivity.java that your imports for Fragment, FragmentManager and FragmentPagerAdapter are referencing the v4 support library, like this

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;

Instead of any of them being

import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentPagerAdapter;

In the notes for this video, it tells you to update the FragmentActivity import, but not the others.

You may not need FragmentManager as it is grey (unused) in my project at this stage, but I left it there anyway as I am just glad that my app will run now.

I hope this helps. I was stuck with this same problem and this seemed to do the trick!

Tyrel Hiebert
Tyrel Hiebert
14,739 Points
Tyrel Hiebert
Tyrel Hiebert
14,739 Points

Oh I forgot this.

Use the quickfix for the PlaceholderFragment in SectionsPagerAdapter.java as well. Make it reference the MainActivity like this

@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 MainActivity.PlaceholderFragment.newInstance(position + 1);
    }

Do this as well as alter the imports in MainActivity.java