how to set only numeric value for EditTextPreference in android?

Question

how to set only numeric value for EditTextPreference in android. I want a user to enter a port number not sure how can I put the limitation there

I am using this co

Answer 1

I use an androidX library because this library has a possibility to customize an input type of EditTextPreference dialog. AndroidX is a major improvement to the original Android Support Library so is suggested that everybody use this library. You can read more about AndroidX here.

Here is my code where I use EditTextPreference inside of onCreatePreference method:

 @Override
    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
        setPreferencesFromResource(R.xml.preference, rootKey);



androidx.preference.EditTextPreference editTextPreference = getPreferenceManager().findPreference("use_key_from_editTextPreference_in_xml_file");
editTextPreference.setOnBindEditTextListener(new androidx.preference.EditTextPreference.OnBindEditTextListener() {
            @Override
            public void onBindEditText(@NonNull EditText editText) {
                editText.setInputType(InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_FLAG_SIGNED);

            }
        });

       }

After you use this code and click on editTextPreference, the dialog will pop up and your keyboard input type will be only numeric.