If you need this application details in many activities of your application, you could save them into the Shared preferences
and use them from all of the activities without passing them each time as extras in an intent. You could do it this way for example:
SharedPreferences.Editor editor = getSharedPreferences(preffName, MODE_PRIVATE).edit(); //preffName is a String variable with the name of your preferences - just use the same string every time
editor.putString("AppName", "MyApplication");
editor.putInt("PackageID", "MyPackageID");
editor.commit();
And then you could get the saved data like this:
SharedPreferences prefs = getSharedPreferences(preffName, MODE_PRIVATE);
String appName = prefs.getString("AppName", "No name defined");//"No name defined" is the default value.
String packageID = prefs.getString("PackageID", "No package id is defined."); //"No package id is defined" is the default value