EditBoxPreference() storing the value as an int instead a string

I'm writing an Android application that can easily back up files and folders to the users PC. One of the things I wanted to implement was allowing the client running on the Android device to change the port I will be sending the file to.

For this, I've created an EditTextPreference to store the value.

The code I'm using to get this value back is

port = prefs.getString("serverPort", "<unset>");

However, this returns a string and I need an int, so I tried to use

sendPort = Integer.parseInt(port);

But this crashes the Android application, with (I think) a number format exception.

Is there anyway I can explicitly store the value that is entered as an Integer to make it easier?

I tried to use the method

port = prefs.getInt(...);

but that didn't work either.

Thanks 开发者_C百科for any help.

This will take whatever is entered into your edit text and put it in an int.

int yourValue = Integer.valueOf(editText.getText().toString());

Note that Integer.valueOf() will return a format exception if you put a String in it that doesn't have an integer value.

You can then use

prefsEdit.putInt("serverPort", yourValue);
prefsEdit.commit();

to save it to preferences. And this to retrieve it

int port = prefs.getInt("serverPort", -1);

Saving the port as String or int doesn't make a big difference. Either way you'll have to convert it.

Your app crashes, because it cannot convert <unset> to a number, that's where the NumberFormatException comes from.

Solution: Catch the NumberFormatException and set sendPort to a default value.

port = prefs.getString("serverPort", "<unset>");
try {
  sendPort = Integer.parseInt(port);
} catch (NumberFormatException ex) {
  sendPort = 1234;
}