Simple class that check for update available or not on Play Store

CheckForUpadate.java

package com.sumeet;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import android.content.Context;
import android.os.AsyncTask;
import android.util.Log;

/**
 * Simple class that check for update available or not on Play Store
 * 
 * @author sumeet.gehi
 */
public class CheckForUpdate {

	static final String PLAY_STORE = "https://play.google.com/store/apps/details?id=";
	static final String PLAY_STORE_TAG = "itemprop=\"softwareVersion\">";
	static final String MARKET_URL = "market://details?id=";
	String TAG = CheckForUpdate.class.getSimpleName();

	String pkgName, version = "0";
	UpdateListner listner;

	public CheckForUpdate(Context context) {
		pkgName = context.getPackageName();
		try {
			version = context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionName;
		} catch (Exception e) {
			e.printStackTrace();
		}

	}

	public void check(UpdateListner listner) {
		setUpdateListner(listner);
		new checkUpdate().execute(pkgName);
	}

	private class checkUpdate extends AsyncTask<String, Integer, String> {

		@Override
		protected String doInBackground(String... params) {

			URL Url;
			HttpURLConnection con;
			try {
				Url = new URL(PLAY_STORE.concat(pkgName));
				con = (HttpURLConnection) Url.openConnection();
				con.setDoInput(true);
				String result = convert(con.getInputStream());
				Log.d("New Version is", result);
				return result.trim();
			} catch (Exception e) {
				e.printStackTrace();
			}

			return null;
		}

		@Override
		protected void onPostExecute(String result) {
			super.onPostExecute(result);
			if (result != null) {
				if (listner != null) {
					if (!version.trim().equals(result))
						listner.OnUpdate(true, result);
					else
						listner.OnUpdate(false, result);
				}
			} else {
				if (listner != null) {
					listner.OnUpdate(false, null);
				}
			}
		}
	}

	private String convert(InputStream inputStream2) throws IOException {
		BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream2));
		String line = "";

		while ((line = bufferedReader.readLine()) != null) {
			if (line.contains(PLAY_STORE_TAG)) {
				String[] split = line.split(PLAY_STORE_TAG);
				String[] version = split[1].split("(<)");
				Log.d(TAG, "**** old ***" + this.version + "***********  " + version[0] + " *******************");
				inputStream2.close();
				// break;
				return version[0];
			}
		}

		inputStream2.close();
		// Log.d("Result", line);
		return null;

	}

	public void setUpdateListner(UpdateListner listner) {
		this.listner = listner;
	}

	public interface UpdateListner {
		public void OnUpdate(boolean isUpdate, String version);
	}
}






and usage is as follow

CheckForUpdate update = new CheckForUpdate(getActivity());
		update.check(new CheckForUpdate.UpdateListner() {

			@Override
			public void OnUpdate(boolean isUpdate, String version) {
				if (version != null) {
					Toast.makeText(getContext(), "is update available " + isUpdate + ", version " + version,
							Toast.LENGTH_SHORT).show();
				}
			}
		});