Android System How to get your application informations?

Want to print what you put in your manifest? 

PackageManager manager = this.getPackageManager();

try {

   PackageInfo info = manager.getPackageInfo(this.getPackageName(), 0);

   String packageName = info.packageName;

   int versionCode = info.versionCode;

   String versionName = info.versionName;

   } catch (NameNotFoundException e) {

   // TODO Auto-generated catch block

   }