Question

I have this code to control if a EditTextPreference is null or not:

    case R.id.prochain_vidange:
                settings = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
                String choix_huile = settings.getString("listPref_huile_moteur", "0");
                km = settings.getString("km", "");
                Log.d("TAG",km);
               int x= Integer.valueOf(km);
               if (km != "")
{
               if (Integer.valueOf(choix_huile) == 0) {
    ............

The problem is in this line:

int x= Integer.valueOf(km);

What could be the problem ?
Thanks.

Answer 1

If you give Integer.valueOf(String s) a string that is not a valid number, it throws a NumberFormatException. Change the default value to 0:

km = settings.getString("km", "0");

Alternatively, you can catch the exception, and set x to 0:

km = settings.getString("km", "");
int x;
try {
    x = Integer.valueOf(km);
} catch(NumberFormatException e) {
    x = 0;
}