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