How to get the build/version number of your Android application?

Question

I need to figure out how to get or make a build number for my Android application. I need the build number to display in the UI.

Do I have to do something with

Answer 1

  PackageInfo pinfo = null;
    try {
        pinfo = getPackageManager().getPackageInfo(getPackageName(), 0);
    } catch (PackageManager.NameNotFoundException e) {
        e.printStackTrace();
    }
    int versionNumber = pinfo.versionCode;
    String versionName = pinfo.versionName;