BasePagerFragment - Simple way to place a FragmentViewPager in a Fragment!

gistfile1.java

/**
 * @project 
 * @author chris.jenkins
 * @created Dec 28, 2011
 */
package com.application.android.ui.fragments;

import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;


/**
 * @author chris.jenkins
 */
public abstract class BasePagerFragment extends BaseFragment
{

    // Data
    private FragmentStatePagerAdapter mAdapter = null;

    // Views
    private int layoutRes;
    private View mRootView;
    private ViewPager mPager;

    // Handlers
    private final Handler handler = new Handler();
    private Runnable runPager;
    private boolean mCreated = false;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
        mRootView = inflater.inflate(layoutRes, container, false);
        mPager = (ViewPager) mRootView.findViewById(R.id.pager);
        mPager.setOffscreenPageLimit(2);
        return mRootView;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState)
    {
        super.onActivityCreated(savedInstanceState);
        if (runPager != null) handler.post(runPager);
        mCreated = true;
    }

    /**
     * @see android.support.v4.app.Fragment#onPause()
     */
    @Override
    public void onPause()
    {
        super.onPause();
        handler.removeCallbacks(runPager);
    }

    /**
     * Set the ViewPager adapter from this or from a subclass.
     * 
     * @author chris.jenkins
     * @param adapter This is a FragmentStatePagerAdapter due to the way it creates the TAG for the 
     * Fragment.
     */
    protected void setAdapter(FragmentStatePagerAdapter adapter)
    {
        mAdapter = adapter;
        runPager = new Runnable() {

            @Override
            public void run()
            {
                mPager.setAdapter(mAdapter);
            }
        };
        if (mCreated)
        {
            handler.post(runPager);
        }
    }

    /**
     * Has to be set before onCreateView
     * 
     * @author chris.jenkins
     * @param layoutRes
     */
    protected void setLayoutRes(int layoutRes)
    {
        this.layoutRes = layoutRes;
    }

}

instead of :
protected void setLayoutRes(int layoutRes) {this.layoutRes = layoutRes}

you can enforce the layoutResrcId pre-requisite by turning it into an abstract method that the child classes must implement:

protected abstract int getLayoutResId();

This also removes the need for private instance variable layoutRes as follows:
...
mRootView = inflater.inflate(getLayoutResId(), container, false);