ViewPagerTabListViewFragment.java

package com.marshalchen.common.demoofui.observablescrollview;

import android.app.Activity;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.widget.ArrayAdapter;

import com.github.ksoichiro.android.observablescrollview.ObservableListView;
import com.github.ksoichiro.android.observablescrollview.ObservableScrollViewCallbacks;
import com.marshalchen.common.demoofui.R;

import java.util.ArrayList;
import java.util.List;

public class ViewPagerTabListViewFragment extends Fragment {

    public static final String ARG_INITIAL_POSITION = "ARG_INITIAL_POSITION";

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.observable_scroll_view_fragment_listview, container, false);

        Activity parentActivity = getActivity();
        final ObservableListView listView = (ObservableListView) view.findViewById(R.id.list);
        listView.addHeaderView(inflater.inflate(R.layout.observable_scroll_view_padding, null));
        List<String> items = new ArrayList<String>();
        for (int i = 1; i <= 100; i++) {
            items.add("Item " + i);
        }
        listView.setAdapter(new ArrayAdapter<String>(parentActivity, android.R.layout.simple_list_item_1, items));

        if (parentActivity instanceof ObservableScrollViewCallbacks) {
            // Scroll to the specified position after layout
            Bundle args = getArguments();
            if (args != null && args.containsKey(ARG_INITIAL_POSITION)) {
                final int initialPosition = args.getInt(ARG_INITIAL_POSITION, 0);
                ViewTreeObserver vto = listView.getViewTreeObserver();
                vto.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
                    @Override
                    public void onGlobalLayout() {
                        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
                            listView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                        } else {
                            listView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                        }
                        // scrollTo() doesn't work, should use setSelection()
                        listView.setSelection(initialPosition);
                    }
                });
            }
            listView.setScrollViewCallbacks((ObservableScrollViewCallbacks) parentActivity);
        }
        return view;
    }
}