//跟App相关的辅助类
public class AppUtils
{

  private AppUtils()
  {
    /* cannot be instantiated */
    throw new UnsupportedOperationException("cannot be instantiated");

  }

  /**
   * 获取应用程序名称
   */
  public static String getAppName(Context context)
  {
    try
    {
      PackageManager packageManager = context.getPackageManager();
      PackageInfo packageInfo = packageManager.getPackageInfo(
          context.getPackageName(), 0);
      int labelRes = packageInfo.applicationInfo.labelRes;
      return context.getResources().getString(labelRes);
    } catch (NameNotFoundException e)
    {
      e.printStackTrace();
    }
    return null;
  }

  /**
   * [获取应用程序版本名称信息]
   * 
   * @param context
   * @return 当前应用的版本名称
   */
  public static String getVersionName(Context context)
  {
    try
    {
      PackageManager packageManager = context.getPackageManager();
      PackageInfo packageInfo = packageManager.getPackageInfo(
          context.getPackageName(), 0);
      return packageInfo.versionName;

    } catch (NameNotFoundException e)
    {
      e.printStackTrace();
    }
    return null;
  }

}