Here you can find the source of getVersionName(Context context)
public static String getVersionName(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 getVersionName(Context context) { try {/*from ww w. java2s . c om*/ PackageInfo pInfo = context.getPackageManager().getPackageInfo( context.getPackageName(), 0); return pInfo.versionName; } catch (PackageManager.NameNotFoundException e) { return "unknown"; } } }