Java tutorial
//package com.java2s; import android.content.Context; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; public class Main { public static int getVersionCode(Context context) { try { PackageInfo pi = context.getPackageManager().getPackageInfo(context.getPackageName(), 0); return pi.versionCode; } catch (PackageManager.NameNotFoundException e) { return 0; } } }