apps/CustomLocale/src/com/android/customlocale2/CustomLocaleActivity.java - platform/development.git - Git at Google

 /*
  * Copyright (C) 2009 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.customlocale2;


 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.Locale;

 import android.app.ActivityManager;
 import android.app.AlertDialog;
 import android.app.Dialog;
 import android.app.IActivityManager;
 import android.app.ListActivity;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.res.Configuration;
 import android.os.Bundle;
 import android.os.RemoteException;
 import android.util.Log;
 import android.view.ContextMenu;
 import android.view.View;
 import android.view.ContextMenu.ContextMenuInfo;
 import android.widget.ArrayAdapter;
 import android.widget.Button;
 import android.widget.ListAdapter;
 import android.widget.ListView;
 import android.widget.TextView;
 import android.widget.Toast;
 import android.widget.AdapterView.AdapterContextMenuInfo;

 /**
  * Displays the list of system locales as well as maintain a custom list of user
  * locales. The user can select a locale and apply it or it can create or remove
  * a custom locale.
  */
 public class CustomLocaleActivity extends ListActivity {

     private static final String TAG = "CustomLocale";
     private static final boolean DEBUG = true;

     private static final int DLG_REMOVE_ID = 0;

     private static final String CUSTOM_LOCALES_SEP = " ";
     private static final String CUSTOM_LOCALES = "custom_locales";

     /** Request code returned when the NewLocaleDialog activity finishes. */
     private static final int UPDATE_LIST = 42;
     /** Menu item id for applying a locale */
     private static final int MENU_APPLY = 43;
     /** Menu item id for removing a custom locale */
     private static final int MENU_REMOVE = 44;

     /** List view displaying system and custom locales. */
     private ListView mListView;
     /** Textview used to display current locale */
     private TextView mCurrentLocaleTextView;
     /** Private shared preferences of this activity. */
     private SharedPreferences mPrefs;

     private Button mRemoveLocaleButton;
     private Button mSelectLocaleButton;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);

         mPrefs = getPreferences(MODE_PRIVATE);

         Button addLocaleButton = (Button) findViewById(R.id.add_new_locale_button);
         mRemoveLocaleButton = (Button) findViewById(R.id.remove_locale_button);
         mSelectLocaleButton = (Button) findViewById(R.id.select_locale_button);

         addLocaleButton.setOnClickListener(new View.OnClickListener() {
             public void onClick(View v) {
                 onAddNewLocale();
             }
         });

         mRemoveLocaleButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 showDialog(DLG_REMOVE_ID);
             }
         });

         mSelectLocaleButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 onSelectLocale();
             }
         });

         mListView = (ListView) findViewById(android.R.id.list);
         mListView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
         mListView.setItemsCanFocus(false);
         mListView.setFocusable(true);
         mListView.setFocusableInTouchMode(true);
         mListView.requestFocus();
         setupLocaleList();

         mCurrentLocaleTextView = (TextView) findViewById(R.id.current_locale);
         displayCurrentLocale();
     }

     @Override
     protected void onResume() {
         super.onResume();
         updateLocaleButtons();
     }

     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         super.onActivityResult(requestCode, resultCode, data);

         if (requestCode == UPDATE_LIST && resultCode == RESULT_OK && data != null) {
             String locale = data.getExtras().getString(NewLocaleDialog.INTENT_EXTRA_LOCALE);
             if (locale != null && locale.length() > 0) {
                 // Get current custom locale list
                 String customLocales = mPrefs.getString(CUSTOM_LOCALES, null);

                 // Update
                 if (customLocales == null) {
                     customLocales = locale;
                 } else {
                     customLocales += CUSTOM_LOCALES_SEP + locale;
                 }

                 // Save prefs
                 if (DEBUG) {
                     Log.d(TAG, "add/customLocales: " + customLocales);
                 }
                 mPrefs.edit().putString(CUSTOM_LOCALES, customLocales).commit();

                 Toast.makeText(this,
                                getString(R.string.added_custom_locale_1s, locale),
                                Toast.LENGTH_SHORT)
                      .show();

                 // Update list view
                 setupLocaleList();

                 // Find the item to select it in the list view
                 checkLocaleInList(locale);

                 if (data.getExtras().getBoolean(NewLocaleDialog.INTENT_EXTRA_SELECT)) {
                     changeSystemLocale(locale);
                 }
             }
         }
     }

     @Override
     protected void onListItemClick(ListView l, View v, int position, long id) {
         super.onListItemClick(l, v, position, id);
         updateLocaleButtons();
     }

     @Override
     public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
         super.onCreateContextMenu(menu, v, menuInfo);

         if (menuInfo instanceof AdapterContextMenuInfo) {
             int position = ((AdapterContextMenuInfo) menuInfo).position;
             Object o = mListView.getItemAtPosition(position);
             if (o instanceof LocaleInfo) {
                 if (((LocaleInfo) o).isCustom()) {
                     menu.setHeaderTitle("System Locale");
                     menu.add(0, MENU_APPLY, 0, "Apply");
                 } else {
                     menu.setHeaderTitle("Custom Locale");
                     menu.add(0, MENU_APPLY, 0, "Apply");
                     menu.add(0, MENU_REMOVE, 0, "Remove");
                 }
             }
         }
     }

     @Override
     protected Dialog onCreateDialog(int id) {
         if (id == DLG_REMOVE_ID) {
             return createRemoveLocaleDialog();
         }
         return super.onCreateDialog(id);
     }

     //--- private parts ---

     private void setupLocaleList() {
         if (DEBUG) {
             Log.d(TAG, "Update locate list");
         }

         ArrayList<LocaleInfo> data = new ArrayList<LocaleInfo>();

         // Insert all system locales
         String[] locales = getAssets().getLocales();
         for (String locale : locales) {
             if (locale != null && locale.length() > 0) {
                 Locale loc = new Locale(locale);
                 data.add(new LocaleInfo(locale, loc.getDisplayName()));
             }
         }
         locales = null;

         // Insert all custom locales
         String customLocales = mPrefs.getString(CUSTOM_LOCALES, "");
         if (DEBUG) {
             Log.d(TAG, "customLocales: " + customLocales);
         }
         for (String locale : customLocales.split(CUSTOM_LOCALES_SEP)) {
             if (locale != null && locale.length() > 0) {
                 Locale loc = new Locale(locale);
                 data.add(new LocaleInfo(
                                 locale,
                                 loc.getDisplayName(),
                                 true /*custom*/));
             }
         }

         // Sort all locales by code
         Collections.sort(data, new Comparator<LocaleInfo>() {
             public int compare(LocaleInfo lhs, LocaleInfo rhs) {
                 return lhs.getLocale().compareTo(rhs.getLocale());
             }
         });

         // Update the list view adapter
         mListView.setAdapter(new ArrayAdapter<LocaleInfo>(
                         this,
                         android.R.layout.simple_list_item_single_choice,
                         data));
         updateLocaleButtons();
     }

     private void changeSystemLocale(String locale) {
         if (ChangeLocale.changeSystemLocale(locale)) {
             Toast.makeText(this,
                             getString(R.string.select_locale_1s, locale),
                             Toast.LENGTH_SHORT)
                  .show();
         }
     }

     private void displayCurrentLocale() {
         try {
             IActivityManager am = ActivityManager.getService();
             Configuration config = am.getConfiguration();

             if (config.locale != null) {
                 String text = String.format("%1$s - %2$s",
                         config.locale.toString(),
                         config.locale.getDisplayName());
                 mCurrentLocaleTextView.setText(text);

                 checkLocaleInList(config.locale.toString());
             }
         } catch (RemoteException e) {
             if (DEBUG) {
                 Log.e(TAG, "get current locale failed", e);
             }
         }
     }

     /** Find the locale by code to select it in the list view */
     private void checkLocaleInList(String locale) {
         ListAdapter a = mListView.getAdapter();
         for (int i = 0; i < a.getCount(); i++) {
             Object o = a.getItem(i);
             if (o instanceof LocaleInfo) {
                 String code = ((LocaleInfo) o).getLocale();
                 if (code != null && code.equals(locale)) {
                     mListView.setSelection(i);
                     mListView.clearChoices();
                     mListView.setItemChecked(i, true);
                     updateLocaleButtons();
                     break;
                 }
             }
         }
     }

     private LocaleInfo getCheckedLocale() {
         int pos = mListView.getCheckedItemPosition();
         ListAdapter a = mListView.getAdapter();
         int n = a.getCount();
         if (pos >= 0 && pos < n) {
             Object o = a.getItem(pos);
             if (o instanceof LocaleInfo) {
                 return (LocaleInfo) o;
             }
         }

         return null;
     }

     /** Update the Select/Remove buttons based on the currently checked locale. */
     private void updateLocaleButtons() {
         LocaleInfo info = getCheckedLocale();
         if (info != null) {
             // Enable it
             mSelectLocaleButton.setEnabled(true);
             mSelectLocaleButton.setText(
                 getString(R.string.select_locale_1s_button, info.getLocale()));

             // Enable the remove button only for custom locales and set the tag to the locale
             mRemoveLocaleButton.setEnabled(info.isCustom());
         } else {
             // If nothing is selected, disable the buttons
             mSelectLocaleButton.setEnabled(false);
             mSelectLocaleButton.setText(R.string.select_locale_button);

             mRemoveLocaleButton.setEnabled(false);
         }
     }

     /** Invoked by the button "Add new..." */
     private void onAddNewLocale() {
         Intent i = new Intent(CustomLocaleActivity.this, NewLocaleDialog.class);
         startActivityForResult(i, UPDATE_LIST);
     }

     /** Invoked by the button Select / mSelectLocaleButton */
     private void onSelectLocale() {
         LocaleInfo info = getCheckedLocale();
         if (info != null) {
             changeSystemLocale(info.getLocale());
         }
     }

     /**
      * Invoked by the button Remove / mRemoveLocaleButton.
      * Creates a dialog to ask for confirmation before actually remove the custom locale.
      */
     private Dialog createRemoveLocaleDialog() {

         LocaleInfo info = getCheckedLocale();
         final String localeToRemove = info == null ? "<error>" : info.getLocale();

         AlertDialog.Builder b = new AlertDialog.Builder(this);
         b.setMessage(getString(R.string.confirm_remove_locale_1s, localeToRemove));
         b.setCancelable(false);
         b.setPositiveButton(R.string.confirm_remove_locale_yes,
             new DialogInterface.OnClickListener() {
                 @Override
                 public void onClick(DialogInterface dialog, int which) {
                     removeCustomLocale(localeToRemove);
                     dismissDialog(DLG_REMOVE_ID);
                 }
         });
         b.setNegativeButton(R.string.confirm_remove_locale_no,
             new DialogInterface.OnClickListener() {
                 @Override
                 public void onClick(DialogInterface dialog, int which) {
                     dismissDialog(DLG_REMOVE_ID);
                 }
         });

         return b.create();
     }

     private void removeCustomLocale(String localeToRemove) {
         // Get current custom locale list
         String oldLocales = mPrefs.getString(CUSTOM_LOCALES, "");

         if (DEBUG) {
             Log.d(TAG, "Remove " + localeToRemove + " from custom locales: " + oldLocales);
         }

         // Update
         StringBuilder sb = new StringBuilder();
         for (String locale : oldLocales.split(CUSTOM_LOCALES_SEP)) {
             if (locale != null && locale.length() > 0 && !locale.equals(localeToRemove)) {
                 if (sb.length() > 0) {
                     sb.append(CUSTOM_LOCALES_SEP);
                 }
                 sb.append(locale);
             }
         }

         String newLocales = sb.toString();
         if (!newLocales.equals(oldLocales)) {
             // Save prefs
             boolean ok = mPrefs.edit().putString(CUSTOM_LOCALES, newLocales).commit();
             if (DEBUG) {
                 Log.d(TAG, "Prefs commit:" + Boolean.toString(ok) + ". Saved: " + newLocales);
             }

             Toast.makeText(this,
                             getString(R.string.removed_custom_locale_1s, localeToRemove),
                             Toast.LENGTH_SHORT)
                  .show();

             // Update list view
             setupLocaleList();
         }
     }

     /**
      * Immutable structure that holds the information displayed by a list view item.
      */
     private static class LocaleInfo {
         private final String mLocale;
         private final String mDisplayName;
         private final boolean mIsCustom;

         public LocaleInfo(String locale, String displayName, boolean isCustom) {
             mLocale = locale;
             mDisplayName = displayName;
             mIsCustom = isCustom;
         }

         public LocaleInfo(String locale, String displayName) {
             this(locale, displayName, false /*custom*/);
         }

         public String getLocale() {
             return mLocale;
         }

         public boolean isCustom() {
             return mIsCustom;
         }

         @Override
         public String toString() {
             StringBuilder sb = new StringBuilder();
             sb.append(mLocale)
               .append(" - ")
               .append(mDisplayName);
             if (mIsCustom) {
                 sb.append(" [Custom]");
             }
             return sb.toString();
         }
     }
 }
	/*
	* Copyright (C) 2009 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.customlocale2;


	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.Comparator;
	import java.util.Locale;

	import android.app.ActivityManager;
	import android.app.AlertDialog;
	import android.app.Dialog;
	import android.app.IActivityManager;
	import android.app.ListActivity;
	import android.content.DialogInterface;
	import android.content.Intent;
	import android.content.SharedPreferences;
	import android.content.res.Configuration;
	import android.os.Bundle;
	import android.os.RemoteException;
	import android.util.Log;
	import android.view.ContextMenu;
	import android.view.View;
	import android.view.ContextMenu.ContextMenuInfo;
	import android.widget.ArrayAdapter;
	import android.widget.Button;
	import android.widget.ListAdapter;
	import android.widget.ListView;
	import android.widget.TextView;
	import android.widget.Toast;
	import android.widget.AdapterView.AdapterContextMenuInfo;

	/**
	* Displays the list of system locales as well as maintain a custom list of user
	* locales. The user can select a locale and apply it or it can create or remove
	* a custom locale.
	*/
	public class CustomLocaleActivity extends ListActivity {

	private static final String TAG = "CustomLocale";
	private static final boolean DEBUG = true;

	private static final int DLG_REMOVE_ID = 0;

	private static final String CUSTOM_LOCALES_SEP = " ";
	private static final String CUSTOM_LOCALES = "custom_locales";

	/** Request code returned when the NewLocaleDialog activity finishes. */
	private static final int UPDATE_LIST = 42;
	/** Menu item id for applying a locale */
	private static final int MENU_APPLY = 43;
	/** Menu item id for removing a custom locale */
	private static final int MENU_REMOVE = 44;

	/** List view displaying system and custom locales. */
	private ListView mListView;
	/** Textview used to display current locale */
	private TextView mCurrentLocaleTextView;
	/** Private shared preferences of this activity. */
	private SharedPreferences mPrefs;

	private Button mRemoveLocaleButton;
	private Button mSelectLocaleButton;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setContentView(R.layout.main);

	mPrefs = getPreferences(MODE_PRIVATE);

	Button addLocaleButton = (Button) findViewById(R.id.add_new_locale_button);
	mRemoveLocaleButton = (Button) findViewById(R.id.remove_locale_button);
	mSelectLocaleButton = (Button) findViewById(R.id.select_locale_button);

	addLocaleButton.setOnClickListener(new View.OnClickListener() {
	public void onClick(View v) {
	onAddNewLocale();
	}
	});

	mRemoveLocaleButton.setOnClickListener(new View.OnClickListener() {
	@Override
	public void onClick(View v) {
	showDialog(DLG_REMOVE_ID);
	}
	});

	mSelectLocaleButton.setOnClickListener(new View.OnClickListener() {
	@Override
	public void onClick(View v) {
	onSelectLocale();
	}
	});

	mListView = (ListView) findViewById(android.R.id.list);
	mListView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
	mListView.setItemsCanFocus(false);
	mListView.setFocusable(true);
	mListView.setFocusableInTouchMode(true);
	mListView.requestFocus();
	setupLocaleList();

	mCurrentLocaleTextView = (TextView) findViewById(R.id.current_locale);
	displayCurrentLocale();
	}

	@Override
	protected void onResume() {
	super.onResume();
	updateLocaleButtons();
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
	super.onActivityResult(requestCode, resultCode, data);

	if (requestCode == UPDATE_LIST && resultCode == RESULT_OK && data != null) {
	String locale = data.getExtras().getString(NewLocaleDialog.INTENT_EXTRA_LOCALE);
	if (locale != null && locale.length() > 0) {
	// Get current custom locale list
	String customLocales = mPrefs.getString(CUSTOM_LOCALES, null);

	// Update
	if (customLocales == null) {
	customLocales = locale;
	} else {
	customLocales += CUSTOM_LOCALES_SEP + locale;
	}

	// Save prefs
	if (DEBUG) {
	Log.d(TAG, "add/customLocales: " + customLocales);
	}
	mPrefs.edit().putString(CUSTOM_LOCALES, customLocales).commit();

	Toast.makeText(this,
	getString(R.string.added_custom_locale_1s, locale),
	Toast.LENGTH_SHORT)
	.show();

	// Update list view
	setupLocaleList();

	// Find the item to select it in the list view
	checkLocaleInList(locale);

	if (data.getExtras().getBoolean(NewLocaleDialog.INTENT_EXTRA_SELECT)) {
	changeSystemLocale(locale);
	}
	}
	}
	}

	@Override
	protected void onListItemClick(ListView l, View v, int position, long id) {
	super.onListItemClick(l, v, position, id);
	updateLocaleButtons();
	}

	@Override
	public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
	super.onCreateContextMenu(menu, v, menuInfo);

	if (menuInfo instanceof AdapterContextMenuInfo) {
	int position = ((AdapterContextMenuInfo) menuInfo).position;
	Object o = mListView.getItemAtPosition(position);
	if (o instanceof LocaleInfo) {
	if (((LocaleInfo) o).isCustom()) {
	menu.setHeaderTitle("System Locale");
	menu.add(0, MENU_APPLY, 0, "Apply");
	} else {
	menu.setHeaderTitle("Custom Locale");
	menu.add(0, MENU_APPLY, 0, "Apply");
	menu.add(0, MENU_REMOVE, 0, "Remove");
	}
	}
	}
	}

	@Override
	protected Dialog onCreateDialog(int id) {
	if (id == DLG_REMOVE_ID) {
	return createRemoveLocaleDialog();
	}
	return super.onCreateDialog(id);
	}

	//--- private parts ---

	private void setupLocaleList() {
	if (DEBUG) {
	Log.d(TAG, "Update locate list");
	}

	ArrayList<LocaleInfo> data = new ArrayList<LocaleInfo>();

	// Insert all system locales
	String[] locales = getAssets().getLocales();
	for (String locale : locales) {
	if (locale != null && locale.length() > 0) {
	Locale loc = new Locale(locale);
	data.add(new LocaleInfo(locale, loc.getDisplayName()));
	}
	}
	locales = null;

	// Insert all custom locales
	String customLocales = mPrefs.getString(CUSTOM_LOCALES, "");
	if (DEBUG) {
	Log.d(TAG, "customLocales: " + customLocales);
	}
	for (String locale : customLocales.split(CUSTOM_LOCALES_SEP)) {
	if (locale != null && locale.length() > 0) {
	Locale loc = new Locale(locale);
	data.add(new LocaleInfo(
	locale,
	loc.getDisplayName(),
	true /custom/));
	}
	}

	// Sort all locales by code
	Collections.sort(data, new Comparator<LocaleInfo>() {
	public int compare(LocaleInfo lhs, LocaleInfo rhs) {
	return lhs.getLocale().compareTo(rhs.getLocale());
	}
	});

	// Update the list view adapter
	mListView.setAdapter(new ArrayAdapter<LocaleInfo>(
	this,
	android.R.layout.simple_list_item_single_choice,
	data));
	updateLocaleButtons();
	}

	private void changeSystemLocale(String locale) {
	if (ChangeLocale.changeSystemLocale(locale)) {
	Toast.makeText(this,
	getString(R.string.select_locale_1s, locale),
	Toast.LENGTH_SHORT)
	.show();
	}
	}

	private void displayCurrentLocale() {
	try {
	IActivityManager am = ActivityManager.getService();
	Configuration config = am.getConfiguration();

	if (config.locale != null) {
	String text = String.format("%1$s - %2$s",
	config.locale.toString(),
	config.locale.getDisplayName());
	mCurrentLocaleTextView.setText(text);

	checkLocaleInList(config.locale.toString());
	}
	} catch (RemoteException e) {
	if (DEBUG) {
	Log.e(TAG, "get current locale failed", e);
	}
	}
	}

	/** Find the locale by code to select it in the list view */
	private void checkLocaleInList(String locale) {
	ListAdapter a = mListView.getAdapter();
	for (int i = 0; i < a.getCount(); i++) {
	Object o = a.getItem(i);
	if (o instanceof LocaleInfo) {
	String code = ((LocaleInfo) o).getLocale();
	if (code != null && code.equals(locale)) {
	mListView.setSelection(i);
	mListView.clearChoices();
	mListView.setItemChecked(i, true);
	updateLocaleButtons();
	break;
	}
	}
	}
	}

	private LocaleInfo getCheckedLocale() {
	int pos = mListView.getCheckedItemPosition();
	ListAdapter a = mListView.getAdapter();
	int n = a.getCount();
	if (pos >= 0 && pos < n) {
	Object o = a.getItem(pos);
	if (o instanceof LocaleInfo) {
	return (LocaleInfo) o;
	}
	}

	return null;
	}

	/** Update the Select/Remove buttons based on the currently checked locale. */
	private void updateLocaleButtons() {
	LocaleInfo info = getCheckedLocale();
	if (info != null) {
	// Enable it
	mSelectLocaleButton.setEnabled(true);
	mSelectLocaleButton.setText(
	getString(R.string.select_locale_1s_button, info.getLocale()));

	// Enable the remove button only for custom locales and set the tag to the locale
	mRemoveLocaleButton.setEnabled(info.isCustom());
	} else {
	// If nothing is selected, disable the buttons
	mSelectLocaleButton.setEnabled(false);
	mSelectLocaleButton.setText(R.string.select_locale_button);

	mRemoveLocaleButton.setEnabled(false);
	}
	}

	/** Invoked by the button "Add new..." */
	private void onAddNewLocale() {
	Intent i = new Intent(CustomLocaleActivity.this, NewLocaleDialog.class);
	startActivityForResult(i, UPDATE_LIST);
	}

	/** Invoked by the button Select / mSelectLocaleButton */
	private void onSelectLocale() {
	LocaleInfo info = getCheckedLocale();
	if (info != null) {
	changeSystemLocale(info.getLocale());
	}
	}

	/**
	* Invoked by the button Remove / mRemoveLocaleButton.
	* Creates a dialog to ask for confirmation before actually remove the custom locale.
	*/
	private Dialog createRemoveLocaleDialog() {

	LocaleInfo info = getCheckedLocale();
	final String localeToRemove = info == null ? "<error>" : info.getLocale();

	AlertDialog.Builder b = new AlertDialog.Builder(this);
	b.setMessage(getString(R.string.confirm_remove_locale_1s, localeToRemove));
	b.setCancelable(false);
	b.setPositiveButton(R.string.confirm_remove_locale_yes,
	new DialogInterface.OnClickListener() {
	@Override
	public void onClick(DialogInterface dialog, int which) {
	removeCustomLocale(localeToRemove);
	dismissDialog(DLG_REMOVE_ID);
	}
	});
	b.setNegativeButton(R.string.confirm_remove_locale_no,
	new DialogInterface.OnClickListener() {
	@Override
	public void onClick(DialogInterface dialog, int which) {
	dismissDialog(DLG_REMOVE_ID);
	}
	});

	return b.create();
	}

	private void removeCustomLocale(String localeToRemove) {
	// Get current custom locale list
	String oldLocales = mPrefs.getString(CUSTOM_LOCALES, "");

	if (DEBUG) {
	Log.d(TAG, "Remove " + localeToRemove + " from custom locales: " + oldLocales);
	}

	// Update
	StringBuilder sb = new StringBuilder();
	for (String locale : oldLocales.split(CUSTOM_LOCALES_SEP)) {
	if (locale != null && locale.length() > 0 && !locale.equals(localeToRemove)) {
	if (sb.length() > 0) {
	sb.append(CUSTOM_LOCALES_SEP);
	}
	sb.append(locale);
	}
	}

	String newLocales = sb.toString();
	if (!newLocales.equals(oldLocales)) {
	// Save prefs
	boolean ok = mPrefs.edit().putString(CUSTOM_LOCALES, newLocales).commit();
	if (DEBUG) {
	Log.d(TAG, "Prefs commit:" + Boolean.toString(ok) + ". Saved: " + newLocales);
	}

	Toast.makeText(this,
	getString(R.string.removed_custom_locale_1s, localeToRemove),
	Toast.LENGTH_SHORT)
	.show();

	// Update list view
	setupLocaleList();
	}
	}

	/**
	* Immutable structure that holds the information displayed by a list view item.
	*/
	private static class LocaleInfo {
	private final String mLocale;
	private final String mDisplayName;
	private final boolean mIsCustom;

	public LocaleInfo(String locale, String displayName, boolean isCustom) {
	mLocale = locale;
	mDisplayName = displayName;
	mIsCustom = isCustom;
	}

	public LocaleInfo(String locale, String displayName) {
	this(locale, displayName, false /custom/);
	}

	public String getLocale() {
	return mLocale;
	}

	public boolean isCustom() {
	return mIsCustom;
	}

	@Override
	public String toString() {
	StringBuilder sb = new StringBuilder();
	sb.append(mLocale)
	.append(" - ")
	.append(mDisplayName);
	if (mIsCustom) {
	sb.append(" [Custom]");
	}
	return sb.toString();
	}
	}
	}