I added the CheckBoxPreference configuration file to the XML. Such code turned out:
<PreferenceCategory android:title="ADs" > <CheckBoxPreference android:key="disableADsByEmail" android:title="@string/pref_email" android:persistent="false" android:defaultValue="false" /> </PreferenceCategory> The problem is that when you close the settings screen (or switch to another section), the parameter value is not saved.
The full code of the settings class (a lot of excess):
package ru.sccraft.scspeak; import android.annotation.TargetApi; import android.content.Context; import android.content.Intent; import android.content.res.Configuration; import android.media.Ringtone; import android.media.RingtoneManager; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.preference.ListPreference; import android.preference.Preference; import android.preference.PreferenceActivity; import android.support.v7.app.ActionBar; import android.preference.PreferenceFragment; import android.preference.PreferenceManager; import android.preference.RingtonePreference; import android.text.TextUtils; import android.view.MenuItem; import android.support.v4.app.NavUtils; import java.util.List; /** * A {@link PreferenceActivity} that presents a set of application settings. On * handset devices, settings are presented as a single list. On tablets, * settings are split by category, with category headers shown to the left of * the list of settings. * <p> * See <a href="http://developer.android.com/design/patterns/settings.html"> * Android Design: Settings</a> for design guidelines and the <a * href="http://developer.android.com/guide/topics/ui/settings.html">Settings * API Guide</a> for more information on developing a Settings UI. */ public class SettingsActivity extends AppCompatPreferenceActivity { /** * A preference value change listener that updates the preference's summary * to reflect its new value. */ private static Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener = new Preference.OnPreferenceChangeListener() { @Override public boolean onPreferenceChange(Preference preference, Object value) { String stringValue = value.toString(); if (preference instanceof ListPreference) { // For list preferences, look up the correct display value in // the preference's 'entries' list. ListPreference listPreference = (ListPreference) preference; int index = listPreference.findIndexOfValue(stringValue); // Set the summary to reflect the new value. preference.setSummary( index >= 0 ? listPreference.getEntries()[index] : null); } else if (preference instanceof RingtonePreference) { // For ringtone preferences, look up the correct display value // using RingtoneManager. if (TextUtils.isEmpty(stringValue)) { // Empty values correspond to 'silent' (no ringtone). preference.setSummary(R.string.pref_ringtone_silent); } else { Ringtone ringtone = RingtoneManager.getRingtone( preference.getContext(), Uri.parse(stringValue)); if (ringtone == null) { // Clear the summary if there was a lookup error. preference.setSummary(null); } else { // Set the summary to reflect the new ringtone display // name. String name = ringtone.getTitle(preference.getContext()); preference.setSummary(name); } } } else { // For all other preferences, set the summary to the value's // simple string representation. preference.setSummary(stringValue); } return true; } }; /** * Helper method to determine if the device has an extra-large screen. For * example, 10" tablets are extra-large. */ private static boolean isXLargeTablet(Context context) { return (context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_XLARGE; } /** * Binds a preference's summary to its value. More specifically, when the * preference's value is changed, its summary (line of text below the * preference title) is updated to reflect the value. The summary is also * immediately updated upon calling this method. The exact display format is * dependent on the type of preference. * * @see #sBindPreferenceSummaryToValueListener */ private static void bindPreferenceSummaryToValue(Preference preference) { // Set the listener to watch for value changes. preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener); // Trigger the listener immediately with the preference's // current value. sBindPreferenceSummaryToValueListener.onPreferenceChange(preference, PreferenceManager .getDefaultSharedPreferences(preference.getContext()) .getString(preference.getKey(), "")); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setupActionBar(); } /** * Set up the {@link android.app.ActionBar}, if the API is available. */ private void setupActionBar() { ActionBar actionBar = getSupportActionBar(); if (actionBar != null) { // Show the Up button in the action bar. actionBar.setDisplayHomeAsUpEnabled(true); } } @Override public boolean onMenuItemSelected(int featureId, MenuItem item) { int id = item.getItemId(); if (id == android.R.id.home) { if (!super.onMenuItemSelected(featureId, item)) { NavUtils.navigateUpFromSameTask(this); } return true; } return super.onMenuItemSelected(featureId, item); } /** * {@inheritDoc} */ @Override public boolean onIsMultiPane() { return isXLargeTablet(this); } /** * {@inheritDoc} */ @Override @TargetApi(Build.VERSION_CODES.HONEYCOMB) public void onBuildHeaders(List<Header> target) { loadHeadersFromResource(R.xml.pref_headers, target); } /** * This method stops fragment injection in malicious applications. * Make sure to deny any unknown fragments here. */ protected boolean isValidFragment(String fragmentName) { return PreferenceFragment.class.getName().equals(fragmentName) || GeneralPreferenceFragment.class.getName().equals(fragmentName) || DataSyncPreferenceFragment.class.getName().equals(fragmentName) || NotificationPreferenceFragment.class.getName().equals(fragmentName); } /** * This fragment shows general preferences only. It is used when the * activity is showing a two-pane settings UI. */ @TargetApi(Build.VERSION_CODES.HONEYCOMB) public static class GeneralPreferenceFragment extends PreferenceFragment { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.pref_general); setHasOptionsMenu(true); // Bind the summaries of EditText/List/Dialog/Ringtone preferences // to their values. When their values change, their summaries are // updated to reflect the new value, per the Android Design // guidelines. //bindPreferenceSummaryToValue(findPreference("example_text")); //bindPreferenceSummaryToValue(findPreference("example_list")); } @Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); if (id == android.R.id.home) { startActivity(new Intent(getActivity(), SettingsActivity.class)); return true; } return super.onOptionsItemSelected(item); } } /** * This fragment shows notification preferences only. It is used when the * activity is showing a two-pane settings UI. */ @TargetApi(Build.VERSION_CODES.HONEYCOMB) public static class NotificationPreferenceFragment extends PreferenceFragment { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.pref_notification); setHasOptionsMenu(true); // Bind the summaries of EditText/List/Dialog/Ringtone preferences // to their values. When their values change, their summaries are // updated to reflect the new value, per the Android Design // guidelines. bindPreferenceSummaryToValue(findPreference("notifications_new_message_ringtone")); } @Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); if (id == android.R.id.home) { startActivity(new Intent(getActivity(), SettingsActivity.class)); return true; } return super.onOptionsItemSelected(item); } } /** * This fragment shows data and sync preferences only. It is used when the * activity is showing a two-pane settings UI. */ @TargetApi(Build.VERSION_CODES.HONEYCOMB) public static class DataSyncPreferenceFragment extends PreferenceFragment { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); addPreferencesFromResource(R.xml.pref_data_sync); setHasOptionsMenu(true); // Bind the summaries of EditText/List/Dialog/Ringtone preferences // to their values. When their values change, their summaries are // updated to reflect the new value, per the Android Design // guidelines. //bindPreferenceSummaryToValue(findPreference("sync_frequency")); } @Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); if (id == android.R.id.home) { startActivity(new Intent(getActivity(), SettingsActivity.class)); return true; } return super.onOptionsItemSelected(item); } } } XML markup refers to the General section. Full text of General XML:
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"> <!-- NOTE: EditTextPreference accepts EditText attributes. --> <!-- NOTE: EditTextPreference's summary should be set to its value by the activity code. --> <!-- NOTE: Hide buttons to simplify the UI. Users can touch outside the dialog to dismiss it. --> <!-- NOTE: ListPreference's summary should be set to its value by the activity code. --> <PreferenceCategory android:title="@string/pref_category_words"> <Preference android:title="@string/removeAllPreference" android:icon="@android:drawable/ic_menu_delete" > <intent android:action="ru.sccraft.scspeak.removeall"/> </Preference> </PreferenceCategory> <PreferenceCategory android:title="ADs" > <CheckBoxPreference android:key="disableADsByEmail" android:title="@string/pref_email" android:persistent="false" android:defaultValue="false" /> </PreferenceCategory> </PreferenceScreen> How to make the value saved?
Android API ~ 25 +
