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      1 /*
      2  * Copyright (C) 2008 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 com.android.browser;
     18 
     19 import android.app.ActionBar;
     20 import android.content.Intent;
     21 import android.os.Bundle;
     22 import android.preference.PreferenceActivity;
     23 import android.view.MenuItem;
     24 
     25 import com.android.browser.preferences.BandwidthPreferencesFragment;
     26 import com.android.browser.preferences.DebugPreferencesFragment;
     27 
     28 import java.util.Arrays;
     29 import java.util.HashSet;
     30 import java.util.List;
     31 import java.util.Set;
     32 
     33 public class BrowserPreferencesPage extends PreferenceActivity {
     34 
     35     public static final String CURRENT_PAGE = "currentPage";
     36     private List<Header> mHeaders;
     37 
     38     @Override
     39     public void onCreate(Bundle icicle) {
     40         super.onCreate(icicle);
     41 
     42         ActionBar actionBar = getActionBar();
     43         if (actionBar != null) {
     44             actionBar.setDisplayOptions(
     45                     ActionBar.DISPLAY_HOME_AS_UP, ActionBar.DISPLAY_HOME_AS_UP);
     46         }
     47     }
     48 
     49     /**
     50      * Populate the activity with the top-level headers.
     51      */
     52     @Override
     53     public void onBuildHeaders(List<Header> target) {
     54         loadHeadersFromResource(R.xml.preference_headers, target);
     55 
     56         if (BrowserSettings.getInstance().isDebugEnabled()) {
     57             Header debug = new Header();
     58             debug.title = getText(R.string.pref_development_title);
     59             debug.fragment = DebugPreferencesFragment.class.getName();
     60             target.add(debug);
     61         }
     62         mHeaders = target;
     63     }
     64 
     65     @Override
     66     public Header onGetInitialHeader() {
     67         String action = getIntent().getAction();
     68         if (Intent.ACTION_MANAGE_NETWORK_USAGE.equals(action)) {
     69             String fragName = BandwidthPreferencesFragment.class.getName();
     70             for (Header h : mHeaders) {
     71                 if (fragName.equals(h.fragment)) {
     72                     return h;
     73                 }
     74             }
     75         }
     76         return super.onGetInitialHeader();
     77     }
     78 
     79     @Override
     80     public boolean onOptionsItemSelected(MenuItem item) {
     81         switch (item.getItemId()) {
     82             case android.R.id.home:
     83                 if (getFragmentManager().getBackStackEntryCount() > 0) {
     84                     getFragmentManager().popBackStack();
     85                 } else {
     86                     finish();
     87                 }
     88                 return true;
     89         }
     90 
     91         return false;
     92     }
     93 
     94     @Override
     95     public Intent onBuildStartFragmentIntent(String fragmentName, Bundle args,
     96             int titleRes, int shortTitleRes) {
     97         Intent intent = super.onBuildStartFragmentIntent(fragmentName, args,
     98                 titleRes, shortTitleRes);
     99         String url = getIntent().getStringExtra(CURRENT_PAGE);
    100         intent.putExtra(CURRENT_PAGE, url);
    101         return intent;
    102     }
    103 
    104     private static final Set<String> sKnownFragments = new HashSet<String>(Arrays.asList(
    105             "com.android.browser.preferences.GeneralPreferencesFragment",
    106             "com.android.browser.preferences.PrivacySecurityPreferencesFragment",
    107             "com.android.browser.preferences.AccessibilityPreferencesFragment",
    108             "com.android.browser.preferences.AdvancedPreferencesFragment",
    109             "com.android.browser.preferences.BandwidthPreferencesFragment",
    110             "com.android.browser.preferences.LabPreferencesFragment"));
    111 
    112     @Override
    113     protected boolean isValidFragment(String fragmentName) {
    114         return sKnownFragments.contains(fragmentName);
    115     }
    116 }
    117