preference用法for_notification用法

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);
}
}

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<SwitchPreference android:defaultValue="true" android:key="example_switch" android:summary="@string/pref_description_social_recommendations" android:title="@string/pref_title_social_recommendations" />
<!-- NOTE: EditTextPreference accepts EditText attributes. -->
<!-- NOTE: EditTextPreference's summary should be set to its value by the activity code. -->
<EditTextPreference android:capitalize="words" android:defaultValue="@string/pref_default_display_name" android:inputType="textCapWords" android:key="example_text" android:maxLines="1" android:selectAllOnFocus="true" android:singleLine="true" android:title="@string/pref_title_display_name" />
<!-- 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. -->
<ListPreference android:defaultValue="-1" android:entries="@array/pref_example_list_titles" android:entryValues="@array/pref_example_list_values" android:key="example_list" android:negativeButtonText="@null" android:positiveButtonText="@null" android:title="@string/pref_title_add_friends_to_messages" />
</PreferenceScreen>

<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. -->
<PreferenceCategory android:key="@string/pref_header_mqtt" android:summary="@string/pref_header_mqtt" android:title="@string/pref_header_mqtt">
<EditTextPreference android:capitalize="characters" android:defaultValue="@string/pref_defult_mqtt_ip" android:inputType="textCapWords" android:key="@string/pref_key_mqtt_ip" android:maxLines="1" android:selectAllOnFocus="true" android:singleLine="true" android:title="@string/pref_title_mqtt_ip" android:summary="@string/pref_defult_mqtt_ip" />
<EditTextPreference android:capitalize="characters" android:defaultValue="@string/pref_defult_mqtt_port" android:inputType="textCapWords" android:key="@string/pref_key_mqtt_port" android:maxLines="1" android:selectAllOnFocus="true" android:singleLine="true" android:title="@string/pref_title_mqtt_port" android:summary="@string/pref_defult_mqtt_port" />
<EditTextPreference android:capitalize="characters" android:defaultValue="@string/pref_defult_mqtt_topic" android:inputType="textCapWords" android:key="@string/pref_key_mqtt_topic" android:maxLines="1" android:selectAllOnFocus="true" android:singleLine="true" android:title="@string/pref_title_mqtt_topic" android:summary="@string/pref_defult_mqtt_topic" />
<EditTextPreference android:capitalize="characters" android:defaultValue="@string/pref_defult_mqtt_user" android:inputType="textCapWords" android:key="@string/pref_key_mqtt_user" android:maxLines="1" android:selectAllOnFocus="true" android:singleLine="true" android:title="@string/pref_title_mqtt_user" android:summary="@string/pref_defult_mqtt_user" />
<EditTextPreference android:capitalize="characters" android:defaultValue="@string/pref_defult_mqtt_pswd" android:inputType="textCapWords" android:key="@string/pref_key_mqtt_pswd" android:maxLines="1" android:selectAllOnFocus="true" android:singleLine="true" android:title="@string/pref_title_mqtt_pswd" android:summary="@string/pref_defult_mqtt_pswd" />
</PreferenceCategory>
</PreferenceScreen>

<preference-headers xmlns:android="http://schemas.android.com/apk/res/android">
<!-- These settings headers are only used on tablets. -->
<header android:fragment="com.pax.preference.SettingsActivity$GeneralPreferenceFragment" android:icon="@drawable/ic_info_black_24dp" android:title="@string/pref_header_general" />
<header android:fragment="com.pax.preference.SettingsActivity$NotificationPreferenceFragment" android:icon="@drawable/ic_notifications_black_24dp" android:title="@string/pref_header_notifications" />
<header android:fragment="com.pax.preference.SettingsActivity$DataSyncPreferenceFragment" android:icon="@drawable/ic_sync_black_24dp" android:title="@string/pref_header_data_sync" />
</preference-headers>

@Override
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public void onBuildHeaders(List<Header> target) { 

loadHeadersFromResource(R.xml.pref_headers, target);
}

private static boolean isXLargeTablet(Context context) { 

return (context.getResources().getConfiguration().screenLayout
& Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_XLARGE;
}