How to use PreferenceScreen in Android

Question

i want use PreferenceScreen for setting page, i know use EditTextPreferences and use this text. but i don't know other Objects, for example : i don't know change text color from ListPreference, or i don't know show/hide text from CheckBoxPreference.

Attention : Please do not negative. I searched on the internet but could not find an appropriate topic, So here's the question I asked. Please guide me instead of giving a negative rating!

Main Activity code :

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main_page);

    ///--- Setting Options
    summary_tv = (TextView) findViewById(R.id.main_summary_text);
    preferences = PreferenceManager.getDefaultSharedPreferences(this);
    String colors = "";
    String main_title_text = preferences.getString("setting_title_text", "main_title");
    summary_tv.setText(main_title_text);
    Boolean main_title_show = preferences.getBoolean("setting_title_show", true);

Preference Activity code :

public class SettingPage extends PreferenceActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getFragmentManager().beginTransaction().replace(android.R.id.content, new MyPreferenceFragment()).commit();
    }

    public static class MyPreferenceFragment extends PreferenceFragment
    {
        @Override
        public void onCreate(final Bundle savedInstanceState)
        {
            super.onCreate(savedInstanceState);
            addPreferencesFromResource(R.xml.setting_prefrences);
        }
    }
}

Preference XML code :

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

    <PreferenceCategory
        android:key="setting_title_title_category"
        android:title="Title options">

    <CheckBoxPreference
        android:id="@+id/setting_title_show_id"
        android:key="setting_title_show"
        android:title="Show Main Title"
        android:summary="Show/hide MainPage title" />

    <EditTextPreference
        android:key="setting_title_text"
        android:title="Set Main Title"
        android:summary="Change MainPage title"
        android:dialogTitle="Change Title"
        android:dialogMessage="Change title please..."/>

    </PreferenceCategory>

    <PreferenceCategory
        android:key="setting_title_font_category"
        android:title="Font options">

        <ListPreference
            android:key="setting_title_font_color"
            android:title="Title font colors"
            android:summary="Change title font colors"
            android:entries="@array/colors"
            android:entryValues="@array/colors"
            android:dialogTitle="Change font color" />

    </PreferenceCategory>

    <RingtonePreference
        android:title="tes"/>

</PreferenceScreen>

String XML code :

<resources>
    <string name="app_name">1-MyTestDb Project</string>
    <string name="title_activity_settings">Settings</string>

    <string-array name="colors">

        <item>White</item>
        <item>Black</item>
        <item>Primary</item>

    </string-array>

</resources>

How can use this preferences in java code. for example change TextView color with ListPreference ?

Answer 1

Use the following code:

public static class MyPreferenceFragment extends PreferenceFragment implements OnSharedPreferenceChangeListener
{
    @Override
    public void onCreate(final Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.setting_prefrences);
    }

    @Override
    protected void onResume() {
        super.onResume();
        getPreferenceScreen().getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
    }

    @Override
    protected void onPause() {
         super.onPause();
         getPreferenceScreen().getSharedPreferences().unregisterOnSharedPreferenceChangeListener(this);
    }

    @Override
    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key)
    {
        if (key.equals("setting_title_font_color"))
        {
            // get preference by key
            Preference pref = findPreference(key);
            // do your stuff here
        }
    }
}

To change the TextView color in activity you need to add the following code to your activity onCreate():

String color = preferences.getString("setting_title_font_color", "White");
if (color.equals("White") {
    summary_tv.setTextColor(Color.WHITE);
} else if (color.equals("Black") {
    summary_tv.setTextColor(Color.BLACK);
} else {
    // default color
}

Note: the color will be changed only when activity is first created. If you wish to update color while activity is running, then put this code in onResume() method.