1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.preference; 18 19 import java.util.Map; 20 21 import android.content.Context; 22 import android.util.AttributeSet; 23 24 /** 25 * Used to group {@link Preference} objects 26 * and provide a disabled title above the group. 27 * 28 * <div class="special reference"> 29 * <h3>Developer Guides</h3> 30 * <p>For information about building a settings UI with Preferences, 31 * read the <a href="{@docRoot}guide/topics/ui/settings.html">Settings</a> 32 * guide.</p> 33 * </div> 34 */ 35 public class PreferenceCategory extends PreferenceGroup { 36 private static final String TAG = "PreferenceCategory"; 37 PreferenceCategory(Context context, AttributeSet attrs, int defStyle)38 public PreferenceCategory(Context context, AttributeSet attrs, int defStyle) { 39 super(context, attrs, defStyle); 40 } 41 PreferenceCategory(Context context, AttributeSet attrs)42 public PreferenceCategory(Context context, AttributeSet attrs) { 43 this(context, attrs, com.android.internal.R.attr.preferenceCategoryStyle); 44 } 45 PreferenceCategory(Context context)46 public PreferenceCategory(Context context) { 47 this(context, null); 48 } 49 50 @Override onPrepareAddPreference(Preference preference)51 protected boolean onPrepareAddPreference(Preference preference) { 52 if (preference instanceof PreferenceCategory) { 53 throw new IllegalArgumentException( 54 "Cannot add a " + TAG + " directly to a " + TAG); 55 } 56 57 return super.onPrepareAddPreference(preference); 58 } 59 60 @Override isEnabled()61 public boolean isEnabled() { 62 return false; 63 } 64 65 @Override shouldDisableDependents()66 public boolean shouldDisableDependents() { 67 return !super.isEnabled(); 68 } 69 } 70