androidsummaryandroid-sharedpreferencesedittextpreference

Displaying EditTextPreference current value in summary


I want to be able to display the value of an EditTextPreference in the summary field. Specifically, I want to do this within PreferenceFragmentCompat.

import android.support.v7.preference.PreferenceFragmentCompat;

public class SettingsFragment extends PreferenceFragmentCompat {

    @Override
    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
        addPreferencesFromResource(R.xml.preferences);
    }
}

Preference file looks like this:

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
    <EditTextPreference
        android:defaultValue="DEVICE01"
        android:key="device_id"
        android:title="Device ID" />
</PreferenceScreen>

I have seen other solutions, but none of them included how to do this within PreferenceFragmentCompat.


Solution

  • I think, it's the same way as in every simple PreferenceFragment: In xml file:

    android:summary="@string/your_string_resource"
    

    In code:

        EditTextPreference editTextPreference = (EditTextPreference) findPreference(YOUR_PREFERENCE_KEY);
        editTextPreference.setSummary(sharedPreferences.getString(YOUR_PREFERENCE_KEY, defaultValue));
        editTextPreference.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
            @Override
            public boolean onPreferenceChange(Preference preference, Object o) {
    
                String yourString = o.toString();
                sharedPreferences.edit().putString(YOUR_PREFERENCE_KEY, yourString).apply();
                editTextPreference.setSummary(yourString);
    
                return true;
            }
        });