Full source code for this solution: https://stackoverflow.com/a/50479184/5740468
import android.os.AsyncTask;
import android.support.annotation.Nullable;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
public class GooglePlayAppVersion extends AsyncTask<String, Void, String> {
private final String packageName;
private final Listener listener;
public interface Listener {
void result(String version);
}
public GooglePlayAppVersion(String packageName, Listener listener) {
this.packageName = packageName;
this.listener = listener;
}
@Override
protected String doInBackground(String... params) {
return getPlayStoreAppVersion(String.format("https://play.google.com/store/apps/details?id=%s", packageName));
}
@Override
protected void onPostExecute(String version) {
listener.result(version);
}
@Nullable
private static String getPlayStoreAppVersion(String appUrlString) {
String
currentVersion_PatternSeq = "<div[^>]*?>Current\\sVersion</div><span[^>]*?>(.*?)><div[^>]*?>(.*?)><span[^>]*?>(.*?)</span>",
appVersion_PatternSeq = "htlgb\">([^<]*)</s";
try {
URLConnection connection = new URL(appUrlString).openConnection();
connection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; WindowsNT 5.1; en-US; rv1.8.1.6) Gecko/20070725 Firefox/2.0.0.6");
try (BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
StringBuilder sourceCode = new StringBuilder();
String line;
while ((line = br.readLine()) != null) sourceCode.append(line);
// Get the current version pattern sequence
String versionString = getAppVersion(currentVersion_PatternSeq, sourceCode.toString());
if (versionString == null) return null;
// get version from "htlgb">X.X.X</span>
return getAppVersion(appVersion_PatternSeq, versionString);
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Nullable
private static String getAppVersion(String patternString, String input) {
try {
Pattern pattern = Pattern.compile(patternString);
if (pattern == null) return null;
Matcher matcher = pattern.matcher(input);
if (matcher.find()) return matcher.group(1);
} catch (PatternSyntaxException e) {
e.printStackTrace();
}
return null;
}
}
Usage:
new GooglePlayAppVersion(getPackageName(), version ->
Log.d("TAG", String.format("App version: %s", version)
).execute();
