Android New Version Available - App Update Dialog Using Json From Own Server

Question

I want to show dialogue when new version is available.

I want to make a json file into my web server, and I will manually update my app version in json file. and my app will parse this json file and will notify users and showing dialogue box to update my app from playstore link by clicking Update button.

I don't want to make this with firebase.

Answer 1

public class ForceUpdateAsync extends AsyncTask<String, String, JSONObject>{

private String latestVersion;
private String currentVersion;
private Context context;
public ForceUpdateAsync(String currentVersion, Context context){
    this.currentVersion = currentVersion;
    this.context = context;
}

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

    try 
 {
         latestVersion = Jsoup.connect("https://play.google.com/store/apps/details?id="+context.getPackageName()+"&hl=en")
                .timeout(30000)
                .userAgent("Mozilla/5.0 (Windows; U; WindowsNT 5.1; en-US; rv1.8.1.6) Gecko/20070725 Firefox/2.0.0.6")
                .referrer("http://www.google.com")
                .get()
                .select("div[itemprop=softwareVersion]")
                .first()
                 .ownText();

    } catch (IOException e) {
        e.printStackTrace();
    }
    return new JSONObject();
}

@Override
protected void onPostExecute(JSONObject jsonObject) {
    if(latestVersion!=null){
        if(!currentVersion.equalsIgnoreCase(latestVersion)){
           // Toast.makeText(context,"update is available.",Toast.LENGTH_LONG).show();
            if(!(context instanceof SplashActivity)) {
                if(!((Activity)context).isFinishing()){
                    showForceUpdateDialog();
                }
            }
        }
    }
    super.onPostExecute(jsonObject);
}

public void showForceUpdateDialog(){
    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(new ContextThemeWrapper(context,
            R.style.DialogDark));

    alertDialogBuilder.setTitle(context.getString(R.string.youAreNotUpdatedTitle));
    alertDialogBuilder.setMessage(context.getString(R.string.youAreNotUpdatedMessage) + " " + latestVersion + context.getString(R.string.youAreNotUpdatedMessage1));
    alertDialogBuilder.setCancelable(false);
    alertDialogBuilder.setPositiveButton(R.string.update, new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int id) {
            context.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=" + context.getPackageName())));
            dialog.cancel();
        }
    });
    alertDialogBuilder.show();
}
 }

after that in your splash activity just use this code

 public void forceUpdate()
{
    PackageManager packageManager = this.getPackageManager();
    PackageInfo packageInfo = null;
    try {
        packageInfo =  packageManager.getPackageInfo(getPackageName(),0);
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
    }
    String currentVersion = packageInfo.versionName;
    new ForceUpdateAsync(currentVersion,BaseActivity.this).execute();
}