Here you can find the source of getVersionCode(Context context)
public static String getVersionCode(Context context)
//package com.java2s; import android.content.Context; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; public class Main { public static String getVersionCode(Context context) { try {//from w w w.j a v a 2 s . c o m PackageInfo pInfo = context.getPackageManager().getPackageInfo( context.getPackageName(), 0); return "" + pInfo.versionCode; } catch (PackageManager.NameNotFoundException e) { return "unknown"; } } }