Get Android application version information programatically in android

Reading Android application version name and version code defined in the Manifest file programatically in android 

       
    /**
     * Method to Fetch Application Name as Defined in Manifest File
     * @returns String
     */
    public String getVersionName(){
        String versionName = "";
        try {
                versionName = getPackageManager().getPackageInfo(getPackageName(), 0).versionName;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return versionName;
    }
   
    /**
     * Method to Fetch Application Number as Defined in Manifest File
     * @returns String
     */
    public int getVersionNumber(){
        int versionNumber = 0;
        try {
            versionNumber = getPackageManager().getPackageInfo(getPackageName(), 0).versionCode;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return versionNumber;
    }