Setting summary to describe the current value

Question

When I'm trying to set summary when the users select a preference item, it normally saved. But when my app is restarted, the summary is gone.

Here is my code to set the summary for ListPreference and EditTextPreference:

public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key){

    Preference pref = findPreference(key);

    // I feel the problem is happened here
    if (pref instanceof ListPreference) {
        ListPreference listPref = (ListPreference) pref;
        pref.setSummary(listPref.getEntry());
    }
    // Same problem here
    if (pref instanceof EditTextPreference) {
        EditTextPreference editText = (EditTextPreference) pref;
        pref.setSummary(editText.getEntry().toString());
    }
}

Is there something wrong?

What about the parameter? This parameter [SharedPreferences sharedPreferences, String key] is associated with Preference pref = findPreference(key). In onCreate, this parameter (String key) is not available. — Anggrayudi H, Sep 30 '14 at 07:47
But I have added android:key for every preferences in the xml. — Anggrayudi H, Sep 30 '14 at 08:21
Does this answer your question? [How to set edittext preference summary and have it stick](https://stackoverflow.com/questions/22651653/how-to-set-edittext-preference-summary-and-have-it-stick) — Mahozad, Sep 23 '20 at 10:03

FreshD · Answer 1 · 2015-12-15T15:31:05.757

27

if you only want to show the current entry, try to set the summary in your xml:

android:summary="%s"

This works only for the ListPreference (see Doc):

If the summary has a String formatting marker in it (i.e. "%s" or "%1$s"), then the current entry value will be substituted in its place.

edited Dec 15 '15 at 15:31

answered Sep 30 '14 at 09:07

FreshD

2,914
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score 7 · Answer 2 · edited Dec 27 '19 at 12:33

The problem might be that the listener is not called on startup (the value is not changed). But you can set the summary dynamically in the XML. For a ListPreference, this is built-in and @FreshD's answer is the way to go. To extend to an EditTextPreference, you need to create your own class. For example

package your.package;

import android.content.Context;
import android.util.AttributeSet;

public class EditTextPreference extends android.preference.EditTextPreference{
        public EditTextPreference(Context context, AttributeSet attrs, int defStyle) {
            super(context, attrs, defStyle);
        }

        public EditTextPreference(Context context, AttributeSet attrs) {
            super(context, attrs);
        }

        public EditTextPreference(Context context) {
            super(context);
        }

        @Override
        public CharSequence getSummary() {
            String summary = super.getSummary().toString();
            return String.format(summary, getText());
        }
    }

And use this in your xml:

<your.package.EditTextPreference
                android:key="pref_alpha"
                android:summary="Actual value: %s"
                android:title="Title"
                android:defaultValue="default"
                />

score 3 · Answer 3 · answered Sep 30 '14 at 08:45

 ListPreference listPref = (ListPreference) findPreference("listkey");
 listPref.setSummary(listPref.getEntry());

 EditTextPreference editText = (EditTextPreference) findPreference("edittextkey");
 editText.setSummary(editText.getEntry().toString());

If you have the key then set the summary like above, in oncreate after addpreferences in your preferenceFragment or Activity

score 2 · Answer 4 · edited May 29 '19 at 09:48

2

I struggled so much to make summaries dynamic. Not exactly sure if this answers the question but wanted to post somewhere so if someone searches they don't have to struggle like i did.

This is the simple solution useSimpleSummaryProvider="true"

edited May 29 '19 at 09:48

Maelig

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answered May 29 '19 at 08:38

Alexander Robinson

63
7

Setting summary to describe the current value

4 Answers4