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 com.android.internal.util.XmlUtils; 20 21 import java.io.IOException; 22 import java.util.Map; 23 24 import org.xmlpull.v1.XmlPullParser; 25 import org.xmlpull.v1.XmlPullParserException; 26 27 import android.app.AliasActivity; 28 import android.content.Context; 29 import android.content.Intent; 30 import android.util.AttributeSet; 31 import android.util.Log; 32 33 /** 34 * The {@link PreferenceInflater} is used to inflate preference hierarchies from 35 * XML files. 36 * <p> 37 * Do not construct this directly, instead use 38 * {@link Context#getSystemService(String)} with 39 * {@link Context#PREFERENCE_INFLATER_SERVICE}. 40 */ 41 class PreferenceInflater extends GenericInflater<Preference, PreferenceGroup> { 42 private static final String TAG = "PreferenceInflater"; 43 private static final String INTENT_TAG_NAME = "intent"; 44 private static final String EXTRA_TAG_NAME = "extra"; 45 46 private PreferenceManager mPreferenceManager; 47 PreferenceInflater(Context context, PreferenceManager preferenceManager)48 public PreferenceInflater(Context context, PreferenceManager preferenceManager) { 49 super(context); 50 init(preferenceManager); 51 } 52 PreferenceInflater(GenericInflater<Preference, PreferenceGroup> original, PreferenceManager preferenceManager, Context newContext)53 PreferenceInflater(GenericInflater<Preference, PreferenceGroup> original, PreferenceManager preferenceManager, Context newContext) { 54 super(original, newContext); 55 init(preferenceManager); 56 } 57 58 @Override cloneInContext(Context newContext)59 public GenericInflater<Preference, PreferenceGroup> cloneInContext(Context newContext) { 60 return new PreferenceInflater(this, mPreferenceManager, newContext); 61 } 62 init(PreferenceManager preferenceManager)63 private void init(PreferenceManager preferenceManager) { 64 mPreferenceManager = preferenceManager; 65 setDefaultPackage("android.preference."); 66 } 67 68 @Override onCreateCustomFromTag(XmlPullParser parser, Preference parentPreference, AttributeSet attrs)69 protected boolean onCreateCustomFromTag(XmlPullParser parser, Preference parentPreference, 70 AttributeSet attrs) throws XmlPullParserException { 71 final String tag = parser.getName(); 72 73 if (tag.equals(INTENT_TAG_NAME)) { 74 Intent intent = null; 75 76 try { 77 intent = Intent.parseIntent(getContext().getResources(), parser, attrs); 78 } catch (IOException e) { 79 XmlPullParserException ex = new XmlPullParserException( 80 "Error parsing preference"); 81 ex.initCause(e); 82 throw ex; 83 } 84 85 if (intent != null) { 86 parentPreference.setIntent(intent); 87 } 88 89 return true; 90 } else if (tag.equals(EXTRA_TAG_NAME)) { 91 getContext().getResources().parseBundleExtra(EXTRA_TAG_NAME, attrs, 92 parentPreference.getExtras()); 93 try { 94 XmlUtils.skipCurrentTag(parser); 95 } catch (IOException e) { 96 XmlPullParserException ex = new XmlPullParserException( 97 "Error parsing preference"); 98 ex.initCause(e); 99 throw ex; 100 } 101 return true; 102 } 103 104 return false; 105 } 106 107 @Override onMergeRoots(PreferenceGroup givenRoot, boolean attachToGivenRoot, PreferenceGroup xmlRoot)108 protected PreferenceGroup onMergeRoots(PreferenceGroup givenRoot, boolean attachToGivenRoot, 109 PreferenceGroup xmlRoot) { 110 // If we were given a Preferences, use it as the root (ignoring the root 111 // Preferences from the XML file). 112 if (givenRoot == null) { 113 xmlRoot.onAttachedToHierarchy(mPreferenceManager); 114 return xmlRoot; 115 } else { 116 return givenRoot; 117 } 118 } 119 120 } 121