Demo Add 2 Instances of Fragments

package com.example.animationtest;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.content.Context;
import android.content.res.AssetManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;

public class TestFragment extends Fragment {
	WebView wv;
	public static boolean odd;
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		View rootView = inflater.inflate(R.layout.fragment_main, null);
		wv = (WebView) rootView.findViewById(R.id.webView1);
		wv.setWebChromeClient(new WebChromeClient());
		wv.getSettings().setJavaScriptEnabled(true);
		wv.setWebViewClient(new WebViewClient() {
			public void onReceivedError(WebView view, int errorCode,
					String description, String failingUrl) {
			}
		});
		// wv.loadUrl("http://www.google.com.vn");
		Button button = (Button) rootView.findViewById(R.id.button1);
		button.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View arg0) {
				// TODO Auto-generated method stub
				FragmentManager fm = getFragmentManager();
				FragmentTransaction ft = fm.beginTransaction();
				ft.add(new TestFragment(), null);
				ft.addToBackStack("test");
				ft.commit();
			}
		});
		LoadWebViewContent loader = new LoadWebViewContent();
		loader.execute();
		return rootView;
	}

	class LoadWebViewContent extends AsyncTask {
		String source;

		@Override
		protected Object doInBackground(Object... arg0) {
			// TODO Auto-generated method stub
			// source = readAssetTextFile(getActivity(), "source.txt");
			try {
				if (odd==true) {
					odd = false;
				} else {
					odd = true;
				}
				String html = "";
				DefaultHttpClient httpClient = new DefaultHttpClient();
				String url ="http://stackoverflow.com/questions/18529004/how-to-add-2-instances-of-the-same-fragment-to-backstack";
				if (odd) url = "http://stackoverflow.com/questions/4790746/links-in-textview/13765953";
				HttpGet request = new HttpGet(url);
				HttpResponse response = httpClient.execute(request);
				InputStream in = response.getEntity().getContent();
				BufferedReader reader = new BufferedReader(
						new InputStreamReader(in));
				StringBuilder str = new StringBuilder();
				String line = null;
				while ((line = reader.readLine()) != null) {
					str.append(line);
				}
				in.close();
				html = str.toString();
				source = html;
				return html;
			} catch (Exception e) {
				return null;
			}
		}

		@Override
		protected void onPostExecute(Object result) {
			// TODO Auto-generated method stub
			super.onPostExecute(result);
			wv.loadData(source, "text/html", "utf-8");
		}
	}
}