Hide password on settings screen

Question

I have easy problem, but I cannot find solution. Lets have settings page generated over Android studio. And here is one field - password.

<EditTextPreference
    android:defaultValue="@string/pref_default_display_password"
    android:inputType="textPassword"
    android:key="password"
    android:maxLines="1"
    android:selectAllOnFocus="true"
    android:singleLine="true"
    android:password="true"
    android:title="@string/pref_title_display_password" />

There is no problem with input which is with asterisks. But problem is, that I see saved password on screen:

How can I hide it?

Thank you very much.

Answer 1

I solved the issue using OnPreferenceChangeListener which is called before the preference is displayed and when it is changed. I take the opportunity then to set a modified version of the password in the summary, by converting the text to string with stars

Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener = new Preference.OnPreferenceChangeListener() {
    @Override
    public boolean onPreferenceChange(Preference preference, Object value) {
        String stringValue = value.toString();
        ...
        if (preference instanceof EditTextPreference){
            // For the pin code, set a *** value in the summary to hide it
            if (preference.getContext().getString(R.string.pref_pin_code_key).equals(preference.getKey())) {
                stringValue = toStars(stringValue);
            }
            preference.setSummary(stringValue);
        }
        ...
        return true;
    }
};

String toStars(String text) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < text.length(); i++) {
        sb.append('*');
    }
    text = sb.toString();
    return text;

}