Change the summary of a ListPreference with the new value (Android)

Question

How can I modify the summary of a ListPreference to the new \"Entry\" string selected by the user (not the entry value)

I suppouse its with setOnPreferenceChangeList

Answer 1

There is no need to do those extra coding, i have faced this problem and solved it by a single line.

After many hours looking on all the answers in this and other similar questions, i found out very easiest way to do this without extending ListPreference, you can do it in common extends PreferenceActivity, see the code bellow.

public class UserSettingsActivity extends PreferenceActivity 
{
    ListPreference listpref;

    @Override
    public void onCreate(Bundle savedInstenceState)
    {
        super.onCreate(savedInstenceState);
        addPreferencesFromResource(R.xml.settings);
        listpref = (ListPreference)findPreference("prefDefaultCurrency");

        listpref.setOnPreferenceChangeListener(new OnPreferenceChangeListener() 
        {           
            @Override
            public boolean onPreferenceChange(Preference preference, Object value) {
            // TODO Auto-generated method stub

            listpref.setSummary(listpref.getEntries()[Integer.parseInt(value.toString())]);
            return true;
        }
    });

Thats it, with a single line, all you have to do is get value passed from the onPreferenceChange(Preference preference, Object value) parse it to integer and pass it to listpref.setSummary(listpref.getEntries()[Integer.parseInt(value.toString())]);

Answer 2

Hi edited the above for EditText if that helps :)

package fr.bmigette.crocoschedulerconsoleandroid;
import android.content.Context;
import android.preference.EditTextPreference;
import android.util.AttributeSet;

/**
 * Created by bastien on 28/07/2015.
 */
public class EditTextPreferenceWithSummary extends EditTextPreference{
    public EditTextPreferenceWithSummary(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

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

    @Override
    public void setText(String value) {
        super.setText(value);
        setSummary(value);
    }

    @Override
    public void setSummary(CharSequence summary) {
        super.setSummary(getText());
    }
}

And creates the preference.xml like this:

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >

    <PreferenceCategory
        android:key="pref_key_category_host"
        android:title="@string/title_category_host" >
        <fr.bmigette.crocoschedulerconsoleandroid.EditTextPreferenceWithSummary
            android:defaultValue="@string/default_pref_host_1"
            android:key="pref_key_host_1"
            android:summary="@string/default_pref_host_1"
            android:title="@string/title_pref_host_1" />

        <fr.bmigette.crocoschedulerconsoleandroid.EditTextPreferenceWithSummary
            android:defaultValue="@string/default_pref_port_1"
            android:key="pref_key_port_1"
            android:summary="@string/default_pref_port_1"
            android:title="@string/title_pref_port_1" />

        <fr.bmigette.crocoschedulerconsoleandroid.EditTextPreferenceWithSummary
            android:defaultValue="@string/default_pref_pass_1"
            android:key="pref_key_pass_1"
            android:summary="@string/default_pref_pass_1"
            android:title="@string/title_pref_pass_1" />

    </PreferenceCategory>
</PreferenceScreen>