Simple-Gallery/app/src/main/java/com/simplemobiletools/gallery/fragments/ViewPagerFragment.java

package com.simplemobiletools.gallery.fragments;

import android.support.v4.app.Fragment;

public abstract class ViewPagerFragment extends Fragment {
    protected FragmentClickListener listener;

    public void setListener(FragmentClickListener ln) {
        listener = ln;
    }

    public abstract void itemDragged();

    public abstract void systemUiVisibilityChanged(boolean toFullscreen);

    public interface FragmentClickListener {
        void fragmentClicked();
    }
}