Checking my app version programmatically in Android market

Question

Currently I\'m checking the app version code on launch and match it with latest version code on my server and based on this matching I send user to get latest update from An

Answer 1

Google Play does not provide any official APIs for retrieving metadata. You could however, check the unofficial API at http://code.google.com/p/android-market-api/.

Specifically, take a look at the Wiki page HowToSearchApps. The response to the query contains version information:

{
  "app": [
    {
      "rating": "4.642857142857143",
      "title": "Ruboto IRB",
      "ratingsCount": 14,
      "creator": "Jan Berkel",
      "appType": "APPLICATION",
      "id": "9089465703133677000",
      "packageName": "org.jruby.ruboto.irb",
      "version": "0.1",
      "versionCode": 1,
      "creatorId": "\"Jan Berkel\"",
      "ExtendedInfo": {
        "category": "Tools",
        "permissionId": [
...

Answer 2

We can do pattern matching for getting the app version from playStore.

To match the latest pattern from google playstore ie <div class="BgcNfc">Current Version</div><span class="htlgb"><div><span class="htlgb">X.X.X</span></div> we first have to match the above node sequence and then from above sequence get the version value. Below is the code snippet for same:

    private String getAppVersion(String patternString, String inputString) {
        try{
            //Create a pattern
            Pattern pattern = Pattern.compile(patternString);
            if (null == pattern) {
                return null;
            }

            //Match the pattern string in provided string
            Matcher matcher = pattern.matcher(inputString);
            if (null != matcher && matcher.find()) {
                return matcher.group(1);
            }

        }catch (PatternSyntaxException ex) {

            ex.printStackTrace();
        }

        return null;
    }


    private String getPlayStoreAppVersion(String appUrlString) {
        final String currentVersion_PatternSeq = "<div[^>]*?>Current\\sVersion</div><span[^>]*?>(.*?)><div[^>]*?>(.*?)><span[^>]*?>(.*?)</span>";
        final String appVersion_PatternSeq = "htlgb\">([^<]*)</s";
        String playStoreAppVersion = null;

        BufferedReader inReader = null;
        URLConnection uc = null;
        StringBuilder urlData = new StringBuilder();

        final URL url = new URL(appUrlString);
        uc = url.openConnection();
        if(uc == null) {
           return null;
        }
        uc.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; WindowsNT 5.1; en-US; rv1.8.1.6) Gecko/20070725 Firefox/2.0.0.6");
        inReader = new BufferedReader(new InputStreamReader(uc.getInputStream()));
        if (null != inReader) {
            String str = "";
            while ((str = inReader.readLine()) != null) {
                           urlData.append(str);
            }
        }

        // Get the current version pattern sequence 
        String versionString = getAppVersion (currentVersion_PatternSeq, urlData.toString());
        if(null == versionString){ 
            return null;
        }else{
            // get version from "htlgb">X.X.X</span>
            playStoreAppVersion = getAppVersion (appVersion_PatternSeq, versionString);
        }

        return playStoreAppVersion;
    }

I got this solved through this. Hope that helps.