SearchSettings.java revision 2f09363e9ed5ae8e91e4495ccfa6533a2f45d8ce
1/* 2 * Copyright (C) 2009 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 17package com.android.quicksearchbox; 18 19import android.app.AlertDialog; 20import android.app.Dialog; 21import android.app.SearchManager; 22import android.content.Context; 23import android.content.DialogInterface; 24import android.content.Intent; 25import android.content.SharedPreferences; 26import android.content.pm.PackageManager; 27import android.content.pm.ResolveInfo; 28import android.database.ContentObserver; 29import android.os.Bundle; 30import android.preference.CheckBoxPreference; 31import android.preference.Preference; 32import android.preference.PreferenceActivity; 33import android.preference.PreferenceScreen; 34import android.preference.Preference.OnPreferenceClickListener; 35import android.provider.Settings; 36import android.provider.Settings.System; 37import android.util.Log; 38import android.view.Menu; 39 40import java.util.List; 41 42/** 43 * Activity for setting global search preferences. 44 */ 45public class SearchSettings extends PreferenceActivity 46 implements OnPreferenceClickListener { 47 48 private static final boolean DBG = false; 49 private static final String TAG = "SearchSettings"; 50 51 // Name of the preferences file used to store search preference 52 public static final String PREFERENCES_NAME = "SearchSettings"; 53 54 // Intent action that opens the "Searchable Items" preference 55 public static final String ACTION_SEARCHABLE_ITEMS = 56 "com.android.quicksearchbox.action.SEARCHABLE_ITEMS"; 57 58 // Only used to find the preferences after inflating 59 private static final String CLEAR_SHORTCUTS_PREF = "clear_shortcuts"; 60 private static final String SEARCH_ENGINE_SETTINGS_PREF = "search_engine_settings"; 61 private static final String SEARCH_CORPORA_PREF = "search_corpora"; 62 63 // Preifx of per-corpus enable preference 64 private static final String CORPUS_ENABLED_PREF_PREFIX = "enable_corpus_"; 65 private static final String VOICE_SEARCH_HINTS_ENABLED_PREF = "voice_search_hints_enabled"; 66 67 // References to the top-level preference objects 68 private Preference mClearShortcutsPreference; 69 private PreferenceScreen mSearchEngineSettingsPreference; 70 private CheckBoxPreference mVoiceSearchHintsPreference; 71 72 // Dialog ids 73 private static final int CLEAR_SHORTCUTS_CONFIRM_DIALOG = 0; 74 75 @Override 76 protected void onCreate(Bundle savedInstanceState) { 77 super.onCreate(savedInstanceState); 78 79 getPreferenceManager().setSharedPreferencesName(PREFERENCES_NAME); 80 81 addPreferencesFromResource(R.xml.preferences); 82 83 PreferenceScreen preferenceScreen = getPreferenceScreen(); 84 mClearShortcutsPreference = preferenceScreen.findPreference(CLEAR_SHORTCUTS_PREF); 85 mSearchEngineSettingsPreference = (PreferenceScreen) preferenceScreen.findPreference( 86 SEARCH_ENGINE_SETTINGS_PREF); 87 mVoiceSearchHintsPreference = (CheckBoxPreference) 88 preferenceScreen.findPreference(VOICE_SEARCH_HINTS_ENABLED_PREF); 89 Preference corporaPreference = preferenceScreen.findPreference(SEARCH_CORPORA_PREF); 90 corporaPreference.setIntent(getSearchableItemsIntent(this)); 91 92 mClearShortcutsPreference.setOnPreferenceClickListener(this); 93 mVoiceSearchHintsPreference.setOnPreferenceClickListener(this); 94 95 updateClearShortcutsPreference(); 96 populateSearchEnginePreference(); 97 } 98 99 public static Intent getSearchableItemsIntent(Context context) { 100 Intent intent = new Intent(SearchSettings.ACTION_SEARCHABLE_ITEMS); 101 intent.setPackage(context.getPackageName()); 102 return intent; 103 } 104 105 /** 106 * Gets the preference key of the preference for whether the given corpus 107 * is enabled. The preference is stored in the {@link #PREFERENCES_NAME} 108 * preferences file. 109 */ 110 public static String getCorpusEnabledPreference(Corpus corpus) { 111 return CORPUS_ENABLED_PREF_PREFIX + corpus.getName(); 112 } 113 114 public static boolean areVoiceSearchHintsEnabled(Context context) { 115 return getSearchPreferences(context).getBoolean(VOICE_SEARCH_HINTS_ENABLED_PREF, true); 116 } 117 118 public static void setVoiceSearchHintsEnabled(Context context, boolean enabled) { 119 getSearchPreferences(context) 120 .edit().putBoolean(VOICE_SEARCH_HINTS_ENABLED_PREF, enabled).commit(); 121 SearchWidgetProvider.updateSearchWidgets(context); 122 } 123 124 public static SharedPreferences getSearchPreferences(Context context) { 125 return context.getSharedPreferences(PREFERENCES_NAME, Context.MODE_PRIVATE); 126 } 127 128 private QsbApplication getQsbApplication() { 129 return (QsbApplication) getApplication(); 130 } 131 132 private ShortcutRepository getShortcuts() { 133 return getQsbApplication().getShortcutRepository(); 134 } 135 136 /** 137 * Enables/disables the "Clear search shortcuts" preference depending 138 * on whether there is any search history. 139 */ 140 private void updateClearShortcutsPreference() { 141 boolean hasHistory = getShortcuts().hasHistory(); 142 if (DBG) Log.d(TAG, "hasHistory()=" + hasHistory); 143 mClearShortcutsPreference.setEnabled(hasHistory); 144 } 145 146 /** 147 * Populates the preference item for the web search engine, which links to further 148 * search settings. 149 */ 150 private void populateSearchEnginePreference() { 151 Intent intent = new Intent(SearchManager.INTENT_ACTION_WEB_SEARCH_SETTINGS); 152 intent.setPackage(getPackageName()); 153 154 CharSequence webSearchSettingsLabel = getActivityLabel(intent); 155 mSearchEngineSettingsPreference.setTitle(webSearchSettingsLabel); 156 mSearchEngineSettingsPreference.setIntent(intent); 157 } 158 159 private CharSequence getActivityLabel(Intent intent) { 160 PackageManager pm = getPackageManager(); 161 List<ResolveInfo> resolveInfos = pm.queryIntentActivities(intent, 0); 162 if (resolveInfos.size() == 0) { 163 Log.e(TAG, "No web search settings activity"); 164 return null; 165 } 166 if (resolveInfos.size() > 1) { 167 Log.e(TAG, "More than one web search settings activity"); 168 return null; 169 } 170 return resolveInfos.get(0).activityInfo.loadLabel(pm); 171 } 172 173 public synchronized boolean onPreferenceClick(Preference preference) { 174 if (preference == mClearShortcutsPreference) { 175 showDialog(CLEAR_SHORTCUTS_CONFIRM_DIALOG); 176 return true; 177 } else if (preference == mVoiceSearchHintsPreference) { 178 SearchWidgetProvider.updateSearchWidgets(this); 179 return true; 180 } 181 return false; 182 } 183 184 @Override 185 protected Dialog onCreateDialog(int id, Bundle args) { 186 switch (id) { 187 case CLEAR_SHORTCUTS_CONFIRM_DIALOG: 188 return new AlertDialog.Builder(this) 189 .setTitle(R.string.clear_shortcuts) 190 .setMessage(R.string.clear_shortcuts_prompt) 191 .setPositiveButton(R.string.agree, new DialogInterface.OnClickListener() { 192 public void onClick(DialogInterface dialog, int whichButton) { 193 if (DBG) Log.d(TAG, "Clearing history..."); 194 getShortcuts().clearHistory(); 195 mClearShortcutsPreference.setEnabled(false); 196 } 197 }) 198 .setNegativeButton(R.string.disagree, null).create(); 199 default: 200 Log.e(TAG, "unknown dialog" + id); 201 return null; 202 } 203 } 204 205 /** 206 * Informs our listeners about the updated settings data. 207 */ 208 public static void broadcastSettingsChanged(Context context) { 209 // We use a message broadcast since the listeners could be in multiple processes. 210 Intent intent = new Intent(SearchManager.INTENT_ACTION_SEARCH_SETTINGS_CHANGED); 211 Log.i(TAG, "Broadcasting: " + intent); 212 context.sendBroadcast(intent); 213 } 214 215 public static boolean getShowWebSuggestions(Context context) { 216 return (Settings.System.getInt(context.getContentResolver(), 217 Settings.System.SHOW_WEB_SUGGESTIONS, 218 1 /* default on until user actually changes it */) == 1); 219 } 220 221 public static void setShowWebSuggestions(Context context, boolean showWebSuggestions) { 222 System.putInt(context.getContentResolver(), System.SHOW_WEB_SUGGESTIONS, 223 showWebSuggestions ? 1 : 0); 224 } 225 226 public static void registerShowWebSuggestionsSettingObserver( 227 Context context, ContentObserver observer) { 228 context.getContentResolver().registerContentObserver( 229 Settings.System.getUriFor(Settings.System.SHOW_WEB_SUGGESTIONS), 230 false, observer); 231 } 232 233 public static void unregisterShowWebSuggestionsSettingObserver( 234 Context context, ContentObserver observer) { 235 context.getContentResolver().unregisterContentObserver(observer); 236 } 237 238 public static void addSearchSettingsMenuItem(Context context, Menu menu) { 239 Intent settings = new Intent(SearchManager.INTENT_ACTION_SEARCH_SETTINGS); 240 settings.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET); 241 // Don't show activity chooser if there are multiple search settings activities, 242 // e.g. from different QSB implementations. 243 settings.setPackage(context.getPackageName()); 244 menu.add(Menu.NONE, Menu.NONE, 0, R.string.menu_settings) 245 .setIcon(android.R.drawable.ic_menu_preferences).setAlphabeticShortcut('P') 246 .setIntent(settings); 247 } 248} 249