src/com/android/settings/inputmethod/InputMethodAndLanguageSettings.java - platform/packages/apps/Settings - Git at Google

 /*
  * Copyright (C) 2008 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.settings.inputmethod;

 import com.android.settings.R;
 import com.android.settings.Settings.KeyboardLayoutPickerActivity;
 import com.android.settings.Settings.SpellCheckersSettingsActivity;
 import com.android.settings.SettingsPreferenceFragment;
 import com.android.settings.Utils;
 import com.android.settings.VoiceInputOutputSettings;

 import android.app.Activity;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.res.Configuration;
 import android.content.res.Resources;
 import android.database.ContentObserver;
 import android.hardware.input.InputManager;
 import android.hardware.input.KeyboardLayout;
 import android.os.Bundle;
 import android.os.Handler;
 import android.preference.CheckBoxPreference;
 import android.preference.ListPreference;
 import android.preference.Preference;
 import android.preference.PreferenceCategory;
 import android.preference.PreferenceScreen;
 import android.provider.Settings;
 import android.provider.Settings.System;
 import android.text.TextUtils;
 import android.view.InputDevice;
 import android.view.inputmethod.InputMethodInfo;
 import android.view.inputmethod.InputMethodManager;

 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.TreeSet;

 public class InputMethodAndLanguageSettings extends SettingsPreferenceFragment
         implements Preference.OnPreferenceChangeListener, InputManager.InputDeviceListener,
         KeyboardLayoutDialogFragment.OnSetupKeyboardLayoutsListener {

     private static final String KEY_PHONE_LANGUAGE = "phone_language";
     private static final String KEY_CURRENT_INPUT_METHOD = "current_input_method";
     private static final String KEY_INPUT_METHOD_SELECTOR = "input_method_selector";
     private static final String KEY_USER_DICTIONARY_SETTINGS = "key_user_dictionary_settings";
     // false: on ICS or later
     private static final boolean SHOW_INPUT_METHOD_SWITCHER_SETTINGS = false;

     private static final String[] sSystemSettingNames = {
         System.TEXT_AUTO_REPLACE, System.TEXT_AUTO_CAPS, System.TEXT_AUTO_PUNCTUATE,
     };

     private static final String[] sHardKeyboardKeys = {
         "auto_replace", "auto_caps", "auto_punctuate",
     };

     private int mDefaultInputMethodSelectorVisibility = 0;
     private ListPreference mShowInputMethodSelectorPref;
     private PreferenceCategory mKeyboardSettingsCategory;
     private PreferenceCategory mHardKeyboardCategory;
     private PreferenceCategory mGameControllerCategory;
     private Preference mLanguagePref;
     private final ArrayList<InputMethodPreference> mInputMethodPreferenceList =
             new ArrayList<InputMethodPreference>();
     private final ArrayList<PreferenceScreen> mHardKeyboardPreferenceList =
             new ArrayList<PreferenceScreen>();
     private InputManager mIm;
     private InputMethodManager mImm;
     private List<InputMethodInfo> mImis;
     private boolean mIsOnlyImeSettings;
     private Handler mHandler;
     @SuppressWarnings("unused")
     private SettingsObserver mSettingsObserver;
     private Intent mIntentWaitingForResult;

     @Override
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);

         addPreferencesFromResource(R.xml.language_settings);

         try {
             mDefaultInputMethodSelectorVisibility = Integer.valueOf(
                     getString(R.string.input_method_selector_visibility_default_value));
         } catch (NumberFormatException e) {
         }

         if (getActivity().getAssets().getLocales().length == 1) {
             // No "Select language" pref if there's only one system locale available.
             getPreferenceScreen().removePreference(findPreference(KEY_PHONE_LANGUAGE));
         } else {
             mLanguagePref = findPreference(KEY_PHONE_LANGUAGE);
         }
         if (SHOW_INPUT_METHOD_SWITCHER_SETTINGS) {
             mShowInputMethodSelectorPref = (ListPreference)findPreference(
                     KEY_INPUT_METHOD_SELECTOR);
             mShowInputMethodSelectorPref.setOnPreferenceChangeListener(this);
             // TODO: Update current input method name on summary
             updateInputMethodSelectorSummary(loadInputMethodSelectorVisibility());
         }

         new VoiceInputOutputSettings(this).onCreate();

         // Get references to dynamically constructed categories.
         mHardKeyboardCategory = (PreferenceCategory)findPreference("hard_keyboard");
         mKeyboardSettingsCategory = (PreferenceCategory)findPreference(
                 "keyboard_settings_category");
         mGameControllerCategory = (PreferenceCategory)findPreference(
                 "game_controller_settings_category");

         // Filter out irrelevant features if invoked from IME settings button.
         mIsOnlyImeSettings = Settings.ACTION_INPUT_METHOD_SETTINGS.equals(
                 getActivity().getIntent().getAction());
         getActivity().getIntent().setAction(null);
         if (mIsOnlyImeSettings) {
             getPreferenceScreen().removeAll();
             getPreferenceScreen().addPreference(mHardKeyboardCategory);
             if (SHOW_INPUT_METHOD_SWITCHER_SETTINGS) {
                 getPreferenceScreen().addPreference(mShowInputMethodSelectorPref);
             }
             getPreferenceScreen().addPreference(mKeyboardSettingsCategory);
         }

         // Build IME preference category.
         mImm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
         mImis = mImm.getInputMethodList();

         mKeyboardSettingsCategory.removeAll();
         if (!mIsOnlyImeSettings) {
             final PreferenceScreen currentIme = new PreferenceScreen(getActivity(), null);
             currentIme.setKey(KEY_CURRENT_INPUT_METHOD);
             currentIme.setTitle(getResources().getString(R.string.current_input_method));
             mKeyboardSettingsCategory.addPreference(currentIme);
         }

         mInputMethodPreferenceList.clear();
         final int N = (mImis == null ? 0 : mImis.size());
         for (int i = 0; i < N; ++i) {
             final InputMethodInfo imi = mImis.get(i);
             final InputMethodPreference pref = getInputMethodPreference(imi, N);
             mInputMethodPreferenceList.add(pref);
         }

         if (!mInputMethodPreferenceList.isEmpty()) {
             Collections.sort(mInputMethodPreferenceList);
             for (int i = 0; i < N; ++i) {
                 mKeyboardSettingsCategory.addPreference(mInputMethodPreferenceList.get(i));
             }
         }

         // Build hard keyboard and game controller preference categories.
         mIm = (InputManager)getActivity().getSystemService(Context.INPUT_SERVICE);
         updateInputDevices();

         // Spell Checker
         final Intent intent = new Intent(Intent.ACTION_MAIN);
         intent.setClass(getActivity(), SpellCheckersSettingsActivity.class);
         final SpellCheckersPreference scp = ((SpellCheckersPreference)findPreference(
                 "spellcheckers_settings"));
         if (scp != null) {
             scp.setFragmentIntent(this, intent);
         }

         mHandler = new Handler();
         mSettingsObserver = new SettingsObserver(mHandler, getActivity());
     }

     private void updateInputMethodSelectorSummary(int value) {
         String[] inputMethodSelectorTitles = getResources().getStringArray(
                 R.array.input_method_selector_titles);
         if (inputMethodSelectorTitles.length > value) {
             mShowInputMethodSelectorPref.setSummary(inputMethodSelectorTitles[value]);
             mShowInputMethodSelectorPref.setValue(String.valueOf(value));
         }
     }

     private void updateUserDictionaryPreference(Preference userDictionaryPreference) {
         final Activity activity = getActivity();
         final TreeSet<String> localeList = UserDictionaryList.getUserDictionaryLocalesSet(activity);
         if (null == localeList) {
             // The locale list is null if and only if the user dictionary service is
             // not present or disabled. In this case we need to remove the preference.
             getPreferenceScreen().removePreference(userDictionaryPreference);
         } else if (localeList.size() <= 1) {
             final Intent intent =
                     new Intent(UserDictionaryList.USER_DICTIONARY_SETTINGS_INTENT_ACTION);
             userDictionaryPreference.setTitle(R.string.user_dict_single_settings_title);
             userDictionaryPreference.setIntent(intent);
             userDictionaryPreference.setFragment(
                     com.android.settings.UserDictionarySettings.class.getName());
             // If the size of localeList is 0, we don't set the locale parameter in the
             // extras. This will be interpreted by the UserDictionarySettings class as
             // meaning "the current locale".
             // Note that with the current code for UserDictionaryList#getUserDictionaryLocalesSet()
             // the locale list always has at least one element, since it always includes the current
             // locale explicitly. @see UserDictionaryList.getUserDictionaryLocalesSet().
             if (localeList.size() == 1) {
                 final String locale = (String)localeList.toArray()[0];
                 userDictionaryPreference.getExtras().putString("locale", locale);
             }
         } else {
             userDictionaryPreference.setTitle(R.string.user_dict_multiple_settings_title);
             userDictionaryPreference.setFragment(UserDictionaryList.class.getName());
         }
     }

     @Override
     public void onResume() {
         super.onResume();

         mSettingsObserver.resume();
         mIm.registerInputDeviceListener(this, null);

         if (!mIsOnlyImeSettings) {
             if (mLanguagePref != null) {
                 Configuration conf = getResources().getConfiguration();
                 String language = conf.locale.getLanguage();
                 String localeString;
                 // TODO: This is not an accurate way to display the locale, as it is
                 // just working around the fact that we support limited dialects
                 // and want to pretend that the language is valid for all locales.
                 // We need a way to support languages that aren't tied to a particular
                 // locale instead of hiding the locale qualifier.
                 if (language.equals("zz")) {
                     String country = conf.locale.getCountry();
                     if (country.equals("ZZ")) {
                         localeString = "[Developer] Accented English (zz_ZZ)";
                     } else if (country.equals("ZY")) {
                         localeString = "[Developer] Fake Bi-Directional (zz_ZY)";
                     } else {
                         localeString = "";
                     }
                 } else if (hasOnlyOneLanguageInstance(language,
                         Resources.getSystem().getAssets().getLocales())) {
                     localeString = conf.locale.getDisplayLanguage(conf.locale);
                 } else {
                     localeString = conf.locale.getDisplayName(conf.locale);
                 }
                 if (localeString.length() > 1) {
                     localeString = Character.toUpperCase(localeString.charAt(0))
                             + localeString.substring(1);
                     mLanguagePref.setSummary(localeString);
                 }
             }

             updateUserDictionaryPreference(findPreference(KEY_USER_DICTIONARY_SETTINGS));
             if (SHOW_INPUT_METHOD_SWITCHER_SETTINGS) {
                 mShowInputMethodSelectorPref.setOnPreferenceChangeListener(this);
             }
         }

         // Hard keyboard
         if (!mHardKeyboardPreferenceList.isEmpty()) {
             for (int i = 0; i < sHardKeyboardKeys.length; ++i) {
                 CheckBoxPreference chkPref = (CheckBoxPreference)
                         mHardKeyboardCategory.findPreference(sHardKeyboardKeys[i]);
                 chkPref.setChecked(
                         System.getInt(getContentResolver(), sSystemSettingNames[i], 1) > 0);
             }
         }

         updateInputDevices();

         // IME
         InputMethodAndSubtypeUtil.loadInputMethodSubtypeList(
                 this, getContentResolver(), mImis, null);
         updateActiveInputMethodsSummary();
     }

     @Override
     public void onPause() {
         super.onPause();

         mIm.unregisterInputDeviceListener(this);
         mSettingsObserver.pause();

         if (SHOW_INPUT_METHOD_SWITCHER_SETTINGS) {
             mShowInputMethodSelectorPref.setOnPreferenceChangeListener(null);
         }
         InputMethodAndSubtypeUtil.saveInputMethodSubtypeList(
                 this, getContentResolver(), mImis, !mHardKeyboardPreferenceList.isEmpty());
     }

     @Override
     public void onInputDeviceAdded(int deviceId) {
         updateInputDevices();
     }

     @Override
     public void onInputDeviceChanged(int deviceId) {
         updateInputDevices();
     }

     @Override
     public void onInputDeviceRemoved(int deviceId) {
         updateInputDevices();
     }

     @Override
     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
         // Input Method stuff
         if (Utils.isMonkeyRunning()) {
             return false;
         }
         if (preference instanceof PreferenceScreen) {
             if (preference.getFragment() != null) {
                 // Fragment will be handled correctly by the super class.
             } else if (KEY_CURRENT_INPUT_METHOD.equals(preference.getKey())) {
                 final InputMethodManager imm = (InputMethodManager)
                         getSystemService(Context.INPUT_METHOD_SERVICE);
                 imm.showInputMethodPicker();
             }
         } else if (preference instanceof CheckBoxPreference) {
             final CheckBoxPreference chkPref = (CheckBoxPreference) preference;
             if (!mHardKeyboardPreferenceList.isEmpty()) {
                 for (int i = 0; i < sHardKeyboardKeys.length; ++i) {
                     if (chkPref == mHardKeyboardCategory.findPreference(sHardKeyboardKeys[i])) {
                         System.putInt(getContentResolver(), sSystemSettingNames[i],
                                 chkPref.isChecked() ? 1 : 0);
                         return true;
                     }
                 }
             }
             if (chkPref == mGameControllerCategory.findPreference("vibrate_input_devices")) {
                 System.putInt(getContentResolver(), Settings.System.VIBRATE_INPUT_DEVICES,
                         chkPref.isChecked() ? 1 : 0);
                 return true;
             }
         }
         return super.onPreferenceTreeClick(preferenceScreen, preference);
     }

     private boolean hasOnlyOneLanguageInstance(String languageCode, String[] locales) {
         int count = 0;
         for (String localeCode : locales) {
             if (localeCode.length() > 2
                     && localeCode.startsWith(languageCode)) {
                 count++;
                 if (count > 1) {
                     return false;
                 }
             }
         }
         return count == 1;
     }

     private void saveInputMethodSelectorVisibility(String value) {
         try {
             int intValue = Integer.valueOf(value);
             Settings.Secure.putInt(getContentResolver(),
                     Settings.Secure.INPUT_METHOD_SELECTOR_VISIBILITY, intValue);
             updateInputMethodSelectorSummary(intValue);
         } catch(NumberFormatException e) {
         }
     }

     private int loadInputMethodSelectorVisibility() {
         return Settings.Secure.getInt(getContentResolver(),
                 Settings.Secure.INPUT_METHOD_SELECTOR_VISIBILITY,
                 mDefaultInputMethodSelectorVisibility);
     }

     @Override
     public boolean onPreferenceChange(Preference preference, Object value) {
         if (SHOW_INPUT_METHOD_SWITCHER_SETTINGS) {
             if (preference == mShowInputMethodSelectorPref) {
                 if (value instanceof String) {
                     saveInputMethodSelectorVisibility((String)value);
                 }
             }
         }
         return false;
     }

     private void updateActiveInputMethodsSummary() {
         for (Preference pref : mInputMethodPreferenceList) {
             if (pref instanceof InputMethodPreference) {
                 ((InputMethodPreference)pref).updateSummary();
             }
         }
         updateCurrentImeName();
     }

     private void updateCurrentImeName() {
         final Context context = getActivity();
         if (context == null || mImm == null) return;
         final Preference curPref = getPreferenceScreen().findPreference(KEY_CURRENT_INPUT_METHOD);
         if (curPref != null) {
             final CharSequence curIme = InputMethodAndSubtypeUtil.getCurrentInputMethodName(
                     context, getContentResolver(), mImm, mImis, getPackageManager());
             if (!TextUtils.isEmpty(curIme)) {
                 synchronized(this) {
                     curPref.setSummary(curIme);
                 }
             }
         }
     }

     private InputMethodPreference getInputMethodPreference(InputMethodInfo imi, int imiSize) {
         final PackageManager pm = getPackageManager();
         final CharSequence label = imi.loadLabel(pm);
         // IME settings
         final Intent intent;
         final String settingsActivity = imi.getSettingsActivity();
         if (!TextUtils.isEmpty(settingsActivity)) {
             intent = new Intent(Intent.ACTION_MAIN);
             intent.setClassName(imi.getPackageName(), settingsActivity);
         } else {
             intent = null;
         }

         // Add a check box for enabling/disabling IME
         InputMethodPreference pref = new InputMethodPreference(this, intent, mImm, imi, imiSize);
         pref.setKey(imi.getId());
         pref.setTitle(label);
         return pref;
     }

     private void updateInputDevices() {
         updateHardKeyboards();
         updateGameControllers();
     }

     private void updateHardKeyboards() {
         mHardKeyboardPreferenceList.clear();
         if (getResources().getConfiguration().keyboard == Configuration.KEYBOARD_QWERTY) {
             final int[] devices = InputDevice.getDeviceIds();
             for (int i = 0; i < devices.length; i++) {
                 InputDevice device = InputDevice.getDevice(devices[i]);
                 if (device != null
                         && !device.isVirtual()
                         && device.isFullKeyboard()) {
                     final String inputDeviceDescriptor = device.getDescriptor();
                     final String keyboardLayoutDescriptor =
                             mIm.getCurrentKeyboardLayoutForInputDevice(inputDeviceDescriptor);
                     final KeyboardLayout keyboardLayout = keyboardLayoutDescriptor != null ?
                             mIm.getKeyboardLayout(keyboardLayoutDescriptor) : null;

                     final PreferenceScreen pref = new PreferenceScreen(getActivity(), null);
                     pref.setTitle(device.getName());
                     if (keyboardLayout != null) {
                         pref.setSummary(keyboardLayout.toString());
                     } else {
                         pref.setSummary(R.string.keyboard_layout_default_label);
                     }
                     pref.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
                         @Override
                         public boolean onPreferenceClick(Preference preference) {
                             showKeyboardLayoutDialog(inputDeviceDescriptor);
                             return true;
                         }
                     });
                     mHardKeyboardPreferenceList.add(pref);
                 }
             }
         }

         if (!mHardKeyboardPreferenceList.isEmpty()) {
             for (int i = mHardKeyboardCategory.getPreferenceCount(); i-- > 0; ) {
                 final Preference pref = mHardKeyboardCategory.getPreference(i);
                 if (pref.getOrder() < 1000) {
                     mHardKeyboardCategory.removePreference(pref);
                 }
             }

             Collections.sort(mHardKeyboardPreferenceList);
             final int count = mHardKeyboardPreferenceList.size();
             for (int i = 0; i < count; i++) {
                 final Preference pref = mHardKeyboardPreferenceList.get(i);
                 pref.setOrder(i);
                 mHardKeyboardCategory.addPreference(pref);
             }

             getPreferenceScreen().addPreference(mHardKeyboardCategory);
         } else {
             getPreferenceScreen().removePreference(mHardKeyboardCategory);
         }
     }

     private void showKeyboardLayoutDialog(String inputDeviceDescriptor) {
         KeyboardLayoutDialogFragment fragment =
                 new KeyboardLayoutDialogFragment(inputDeviceDescriptor);
         fragment.setTargetFragment(this, 0);
         fragment.show(getActivity().getFragmentManager(), "keyboardLayout");
     }

     @Override
     public void onSetupKeyboardLayouts(String inputDeviceDescriptor) {
         final Intent intent = new Intent(Intent.ACTION_MAIN);
         intent.setClass(getActivity(), KeyboardLayoutPickerActivity.class);
         intent.putExtra(KeyboardLayoutPickerFragment.EXTRA_INPUT_DEVICE_DESCRIPTOR,
                 inputDeviceDescriptor);
         mIntentWaitingForResult = intent;
         startActivityForResult(intent, 0);
     }

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

         if (mIntentWaitingForResult != null) {
             String inputDeviceDescriptor = mIntentWaitingForResult.getStringExtra(
                     KeyboardLayoutPickerFragment.EXTRA_INPUT_DEVICE_DESCRIPTOR);
             mIntentWaitingForResult = null;
             showKeyboardLayoutDialog(inputDeviceDescriptor);
         }
     }

     private void updateGameControllers() {
         if (haveInputDeviceWithVibrator()) {
             getPreferenceScreen().addPreference(mGameControllerCategory);

             CheckBoxPreference chkPref = (CheckBoxPreference)
                     mGameControllerCategory.findPreference("vibrate_input_devices");
             chkPref.setChecked(System.getInt(getContentResolver(),
                     Settings.System.VIBRATE_INPUT_DEVICES, 1) > 0);
         } else {
             getPreferenceScreen().removePreference(mGameControllerCategory);
         }
     }

     private boolean haveInputDeviceWithVibrator() {
         final int[] devices = InputDevice.getDeviceIds();
         for (int i = 0; i < devices.length; i++) {
             InputDevice device = InputDevice.getDevice(devices[i]);
             if (device != null && !device.isVirtual() && device.getVibrator().hasVibrator()) {
                 return true;
             }
         }
         return false;
     }

     private class SettingsObserver extends ContentObserver {
         private Context mContext;

         public SettingsObserver(Handler handler, Context context) {
             super(handler);
             mContext = context;
         }

         @Override public void onChange(boolean selfChange) {
             updateCurrentImeName();
         }

         public void resume() {
             final ContentResolver cr = mContext.getContentResolver();
             cr.registerContentObserver(
                     Settings.Secure.getUriFor(Settings.Secure.DEFAULT_INPUT_METHOD), false, this);
             cr.registerContentObserver(Settings.Secure.getUriFor(
                     Settings.Secure.SELECTED_INPUT_METHOD_SUBTYPE), false, this);
         }

         public void pause() {
             mContext.getContentResolver().unregisterContentObserver(this);
         }
     }
 }
	/*
	* Copyright (C) 2008 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.settings.inputmethod;

	import com.android.settings.R;
	import com.android.settings.Settings.KeyboardLayoutPickerActivity;
	import com.android.settings.Settings.SpellCheckersSettingsActivity;
	import com.android.settings.SettingsPreferenceFragment;
	import com.android.settings.Utils;
	import com.android.settings.VoiceInputOutputSettings;

	import android.app.Activity;
	import android.content.ContentResolver;
	import android.content.Context;
	import android.content.Intent;
	import android.content.pm.PackageManager;
	import android.content.res.Configuration;
	import android.content.res.Resources;
	import android.database.ContentObserver;
	import android.hardware.input.InputManager;
	import android.hardware.input.KeyboardLayout;
	import android.os.Bundle;
	import android.os.Handler;
	import android.preference.CheckBoxPreference;
	import android.preference.ListPreference;
	import android.preference.Preference;
	import android.preference.PreferenceCategory;
	import android.preference.PreferenceScreen;
	import android.provider.Settings;
	import android.provider.Settings.System;
	import android.text.TextUtils;
	import android.view.InputDevice;
	import android.view.inputmethod.InputMethodInfo;
	import android.view.inputmethod.InputMethodManager;

	import java.util.ArrayList;
	import java.util.Collections;
	import java.util.List;
	import java.util.TreeSet;

	public class InputMethodAndLanguageSettings extends SettingsPreferenceFragment
	implements Preference.OnPreferenceChangeListener, InputManager.InputDeviceListener,
	KeyboardLayoutDialogFragment.OnSetupKeyboardLayoutsListener {

	private static final String KEY_PHONE_LANGUAGE = "phone_language";
	private static final String KEY_CURRENT_INPUT_METHOD = "current_input_method";
	private static final String KEY_INPUT_METHOD_SELECTOR = "input_method_selector";
	private static final String KEY_USER_DICTIONARY_SETTINGS = "key_user_dictionary_settings";
	// false: on ICS or later
	private static final boolean SHOW_INPUT_METHOD_SWITCHER_SETTINGS = false;

	private static final String[] sSystemSettingNames = {
	System.TEXT_AUTO_REPLACE, System.TEXT_AUTO_CAPS, System.TEXT_AUTO_PUNCTUATE,
	};

	private static final String[] sHardKeyboardKeys = {
	"auto_replace", "auto_caps", "auto_punctuate",
	};

	private int mDefaultInputMethodSelectorVisibility = 0;
	private ListPreference mShowInputMethodSelectorPref;
	private PreferenceCategory mKeyboardSettingsCategory;
	private PreferenceCategory mHardKeyboardCategory;
	private PreferenceCategory mGameControllerCategory;
	private Preference mLanguagePref;
	private final ArrayList<InputMethodPreference> mInputMethodPreferenceList =
	new ArrayList<InputMethodPreference>();
	private final ArrayList<PreferenceScreen> mHardKeyboardPreferenceList =
	new ArrayList<PreferenceScreen>();
	private InputManager mIm;
	private InputMethodManager mImm;
	private List<InputMethodInfo> mImis;
	private boolean mIsOnlyImeSettings;
	private Handler mHandler;
	@SuppressWarnings("unused")
	private SettingsObserver mSettingsObserver;
	private Intent mIntentWaitingForResult;

	@Override
	public void onCreate(Bundle icicle) {
	super.onCreate(icicle);

	addPreferencesFromResource(R.xml.language_settings);

	try {
	mDefaultInputMethodSelectorVisibility = Integer.valueOf(
	getString(R.string.input_method_selector_visibility_default_value));
	} catch (NumberFormatException e) {
	}

	if (getActivity().getAssets().getLocales().length == 1) {
	// No "Select language" pref if there's only one system locale available.
	getPreferenceScreen().removePreference(findPreference(KEY_PHONE_LANGUAGE));
	} else {
	mLanguagePref = findPreference(KEY_PHONE_LANGUAGE);
	}
	if (SHOW_INPUT_METHOD_SWITCHER_SETTINGS) {
	mShowInputMethodSelectorPref = (ListPreference)findPreference(
	KEY_INPUT_METHOD_SELECTOR);
	mShowInputMethodSelectorPref.setOnPreferenceChangeListener(this);
	// TODO: Update current input method name on summary
	updateInputMethodSelectorSummary(loadInputMethodSelectorVisibility());
	}

	new VoiceInputOutputSettings(this).onCreate();

	// Get references to dynamically constructed categories.
	mHardKeyboardCategory = (PreferenceCategory)findPreference("hard_keyboard");
	mKeyboardSettingsCategory = (PreferenceCategory)findPreference(
	"keyboard_settings_category");
	mGameControllerCategory = (PreferenceCategory)findPreference(
	"game_controller_settings_category");

	// Filter out irrelevant features if invoked from IME settings button.
	mIsOnlyImeSettings = Settings.ACTION_INPUT_METHOD_SETTINGS.equals(
	getActivity().getIntent().getAction());
	getActivity().getIntent().setAction(null);
	if (mIsOnlyImeSettings) {
	getPreferenceScreen().removeAll();
	getPreferenceScreen().addPreference(mHardKeyboardCategory);
	if (SHOW_INPUT_METHOD_SWITCHER_SETTINGS) {
	getPreferenceScreen().addPreference(mShowInputMethodSelectorPref);
	}
	getPreferenceScreen().addPreference(mKeyboardSettingsCategory);
	}

	// Build IME preference category.
	mImm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
	mImis = mImm.getInputMethodList();

	mKeyboardSettingsCategory.removeAll();
	if (!mIsOnlyImeSettings) {
	final PreferenceScreen currentIme = new PreferenceScreen(getActivity(), null);
	currentIme.setKey(KEY_CURRENT_INPUT_METHOD);
	currentIme.setTitle(getResources().getString(R.string.current_input_method));
	mKeyboardSettingsCategory.addPreference(currentIme);
	}

	mInputMethodPreferenceList.clear();
	final int N = (mImis == null ? 0 : mImis.size());
	for (int i = 0; i < N; ++i) {
	final InputMethodInfo imi = mImis.get(i);
	final InputMethodPreference pref = getInputMethodPreference(imi, N);
	mInputMethodPreferenceList.add(pref);
	}

	if (!mInputMethodPreferenceList.isEmpty()) {
	Collections.sort(mInputMethodPreferenceList);
	for (int i = 0; i < N; ++i) {
	mKeyboardSettingsCategory.addPreference(mInputMethodPreferenceList.get(i));
	}
	}

	// Build hard keyboard and game controller preference categories.
	mIm = (InputManager)getActivity().getSystemService(Context.INPUT_SERVICE);
	updateInputDevices();

	// Spell Checker
	final Intent intent = new Intent(Intent.ACTION_MAIN);
	intent.setClass(getActivity(), SpellCheckersSettingsActivity.class);
	final SpellCheckersPreference scp = ((SpellCheckersPreference)findPreference(
	"spellcheckers_settings"));
	if (scp != null) {
	scp.setFragmentIntent(this, intent);
	}

	mHandler = new Handler();
	mSettingsObserver = new SettingsObserver(mHandler, getActivity());
	}

	private void updateInputMethodSelectorSummary(int value) {
	String[] inputMethodSelectorTitles = getResources().getStringArray(
	R.array.input_method_selector_titles);
	if (inputMethodSelectorTitles.length > value) {
	mShowInputMethodSelectorPref.setSummary(inputMethodSelectorTitles[value]);
	mShowInputMethodSelectorPref.setValue(String.valueOf(value));
	}
	}

	private void updateUserDictionaryPreference(Preference userDictionaryPreference) {
	final Activity activity = getActivity();
	final TreeSet<String> localeList = UserDictionaryList.getUserDictionaryLocalesSet(activity);
	if (null == localeList) {
	// The locale list is null if and only if the user dictionary service is
	// not present or disabled. In this case we need to remove the preference.
	getPreferenceScreen().removePreference(userDictionaryPreference);
	} else if (localeList.size() <= 1) {
	final Intent intent =
	new Intent(UserDictionaryList.USER_DICTIONARY_SETTINGS_INTENT_ACTION);
	userDictionaryPreference.setTitle(R.string.user_dict_single_settings_title);
	userDictionaryPreference.setIntent(intent);
	userDictionaryPreference.setFragment(
	com.android.settings.UserDictionarySettings.class.getName());
	// If the size of localeList is 0, we don't set the locale parameter in the
	// extras. This will be interpreted by the UserDictionarySettings class as
	// meaning "the current locale".
	// Note that with the current code for UserDictionaryList#getUserDictionaryLocalesSet()
	// the locale list always has at least one element, since it always includes the current
	// locale explicitly. @see UserDictionaryList.getUserDictionaryLocalesSet().
	if (localeList.size() == 1) {
	final String locale = (String)localeList.toArray()[0];
	userDictionaryPreference.getExtras().putString("locale", locale);
	}
	} else {
	userDictionaryPreference.setTitle(R.string.user_dict_multiple_settings_title);
	userDictionaryPreference.setFragment(UserDictionaryList.class.getName());
	}
	}

	@Override
	public void onResume() {
	super.onResume();

	mSettingsObserver.resume();
	mIm.registerInputDeviceListener(this, null);

	if (!mIsOnlyImeSettings) {
	if (mLanguagePref != null) {
	Configuration conf = getResources().getConfiguration();
	String language = conf.locale.getLanguage();
	String localeString;
	// TODO: This is not an accurate way to display the locale, as it is
	// just working around the fact that we support limited dialects
	// and want to pretend that the language is valid for all locales.
	// We need a way to support languages that aren't tied to a particular
	// locale instead of hiding the locale qualifier.
	if (language.equals("zz")) {
	String country = conf.locale.getCountry();
	if (country.equals("ZZ")) {
	localeString = "[Developer] Accented English (zz_ZZ)";
	} else if (country.equals("ZY")) {
	localeString = "[Developer] Fake Bi-Directional (zz_ZY)";
	} else {
	localeString = "";
	}
	} else if (hasOnlyOneLanguageInstance(language,
	Resources.getSystem().getAssets().getLocales())) {
	localeString = conf.locale.getDisplayLanguage(conf.locale);
	} else {
	localeString = conf.locale.getDisplayName(conf.locale);
	}
	if (localeString.length() > 1) {
	localeString = Character.toUpperCase(localeString.charAt(0))
	+ localeString.substring(1);
	mLanguagePref.setSummary(localeString);
	}
	}

	updateUserDictionaryPreference(findPreference(KEY_USER_DICTIONARY_SETTINGS));
	if (SHOW_INPUT_METHOD_SWITCHER_SETTINGS) {
	mShowInputMethodSelectorPref.setOnPreferenceChangeListener(this);
	}
	}

	// Hard keyboard
	if (!mHardKeyboardPreferenceList.isEmpty()) {
	for (int i = 0; i < sHardKeyboardKeys.length; ++i) {
	CheckBoxPreference chkPref = (CheckBoxPreference)
	mHardKeyboardCategory.findPreference(sHardKeyboardKeys[i]);
	chkPref.setChecked(
	System.getInt(getContentResolver(), sSystemSettingNames[i], 1) > 0);
	}
	}

	updateInputDevices();

	// IME
	InputMethodAndSubtypeUtil.loadInputMethodSubtypeList(
	this, getContentResolver(), mImis, null);
	updateActiveInputMethodsSummary();
	}

	@Override
	public void onPause() {
	super.onPause();

	mIm.unregisterInputDeviceListener(this);
	mSettingsObserver.pause();

	if (SHOW_INPUT_METHOD_SWITCHER_SETTINGS) {
	mShowInputMethodSelectorPref.setOnPreferenceChangeListener(null);
	}
	InputMethodAndSubtypeUtil.saveInputMethodSubtypeList(
	this, getContentResolver(), mImis, !mHardKeyboardPreferenceList.isEmpty());
	}

	@Override
	public void onInputDeviceAdded(int deviceId) {
	updateInputDevices();
	}

	@Override
	public void onInputDeviceChanged(int deviceId) {
	updateInputDevices();
	}

	@Override
	public void onInputDeviceRemoved(int deviceId) {
	updateInputDevices();
	}

	@Override
	public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
	// Input Method stuff
	if (Utils.isMonkeyRunning()) {
	return false;
	}
	if (preference instanceof PreferenceScreen) {
	if (preference.getFragment() != null) {
	// Fragment will be handled correctly by the super class.
	} else if (KEY_CURRENT_INPUT_METHOD.equals(preference.getKey())) {
	final InputMethodManager imm = (InputMethodManager)
	getSystemService(Context.INPUT_METHOD_SERVICE);
	imm.showInputMethodPicker();
	}
	} else if (preference instanceof CheckBoxPreference) {
	final CheckBoxPreference chkPref = (CheckBoxPreference) preference;
	if (!mHardKeyboardPreferenceList.isEmpty()) {
	for (int i = 0; i < sHardKeyboardKeys.length; ++i) {
	if (chkPref == mHardKeyboardCategory.findPreference(sHardKeyboardKeys[i])) {
	System.putInt(getContentResolver(), sSystemSettingNames[i],
	chkPref.isChecked() ? 1 : 0);
	return true;
	}
	}
	}
	if (chkPref == mGameControllerCategory.findPreference("vibrate_input_devices")) {
	System.putInt(getContentResolver(), Settings.System.VIBRATE_INPUT_DEVICES,
	chkPref.isChecked() ? 1 : 0);
	return true;
	}
	}
	return super.onPreferenceTreeClick(preferenceScreen, preference);
	}

	private boolean hasOnlyOneLanguageInstance(String languageCode, String[] locales) {
	int count = 0;
	for (String localeCode : locales) {
	if (localeCode.length() > 2
	&& localeCode.startsWith(languageCode)) {
	count++;
	if (count > 1) {
	return false;
	}
	}
	}
	return count == 1;
	}

	private void saveInputMethodSelectorVisibility(String value) {
	try {
	int intValue = Integer.valueOf(value);
	Settings.Secure.putInt(getContentResolver(),
	Settings.Secure.INPUT_METHOD_SELECTOR_VISIBILITY, intValue);
	updateInputMethodSelectorSummary(intValue);
	} catch(NumberFormatException e) {
	}
	}

	private int loadInputMethodSelectorVisibility() {
	return Settings.Secure.getInt(getContentResolver(),
	Settings.Secure.INPUT_METHOD_SELECTOR_VISIBILITY,
	mDefaultInputMethodSelectorVisibility);
	}

	@Override
	public boolean onPreferenceChange(Preference preference, Object value) {
	if (SHOW_INPUT_METHOD_SWITCHER_SETTINGS) {
	if (preference == mShowInputMethodSelectorPref) {
	if (value instanceof String) {
	saveInputMethodSelectorVisibility((String)value);
	}
	}
	}
	return false;
	}

	private void updateActiveInputMethodsSummary() {
	for (Preference pref : mInputMethodPreferenceList) {
	if (pref instanceof InputMethodPreference) {
	((InputMethodPreference)pref).updateSummary();
	}
	}
	updateCurrentImeName();
	}

	private void updateCurrentImeName() {
	final Context context = getActivity();
	if (context == null \|\| mImm == null) return;
	final Preference curPref = getPreferenceScreen().findPreference(KEY_CURRENT_INPUT_METHOD);
	if (curPref != null) {
	final CharSequence curIme = InputMethodAndSubtypeUtil.getCurrentInputMethodName(
	context, getContentResolver(), mImm, mImis, getPackageManager());
	if (!TextUtils.isEmpty(curIme)) {
	synchronized(this) {
	curPref.setSummary(curIme);
	}
	}
	}
	}

	private InputMethodPreference getInputMethodPreference(InputMethodInfo imi, int imiSize) {
	final PackageManager pm = getPackageManager();
	final CharSequence label = imi.loadLabel(pm);
	// IME settings
	final Intent intent;
	final String settingsActivity = imi.getSettingsActivity();
	if (!TextUtils.isEmpty(settingsActivity)) {
	intent = new Intent(Intent.ACTION_MAIN);
	intent.setClassName(imi.getPackageName(), settingsActivity);
	} else {
	intent = null;
	}

	// Add a check box for enabling/disabling IME
	InputMethodPreference pref = new InputMethodPreference(this, intent, mImm, imi, imiSize);
	pref.setKey(imi.getId());
	pref.setTitle(label);
	return pref;
	}

	private void updateInputDevices() {
	updateHardKeyboards();
	updateGameControllers();
	}

	private void updateHardKeyboards() {
	mHardKeyboardPreferenceList.clear();
	if (getResources().getConfiguration().keyboard == Configuration.KEYBOARD_QWERTY) {
	final int[] devices = InputDevice.getDeviceIds();
	for (int i = 0; i < devices.length; i++) {
	InputDevice device = InputDevice.getDevice(devices[i]);
	if (device != null
	&& !device.isVirtual()
	&& device.isFullKeyboard()) {
	final String inputDeviceDescriptor = device.getDescriptor();
	final String keyboardLayoutDescriptor =
	mIm.getCurrentKeyboardLayoutForInputDevice(inputDeviceDescriptor);
	final KeyboardLayout keyboardLayout = keyboardLayoutDescriptor != null ?
	mIm.getKeyboardLayout(keyboardLayoutDescriptor) : null;

	final PreferenceScreen pref = new PreferenceScreen(getActivity(), null);
	pref.setTitle(device.getName());
	if (keyboardLayout != null) {
	pref.setSummary(keyboardLayout.toString());
	} else {
	pref.setSummary(R.string.keyboard_layout_default_label);
	}
	pref.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
	@Override
	public boolean onPreferenceClick(Preference preference) {
	showKeyboardLayoutDialog(inputDeviceDescriptor);
	return true;
	}
	});
	mHardKeyboardPreferenceList.add(pref);
	}
	}
	}

	if (!mHardKeyboardPreferenceList.isEmpty()) {
	for (int i = mHardKeyboardCategory.getPreferenceCount(); i-- > 0; ) {
	final Preference pref = mHardKeyboardCategory.getPreference(i);
	if (pref.getOrder() < 1000) {
	mHardKeyboardCategory.removePreference(pref);
	}
	}

	Collections.sort(mHardKeyboardPreferenceList);
	final int count = mHardKeyboardPreferenceList.size();
	for (int i = 0; i < count; i++) {
	final Preference pref = mHardKeyboardPreferenceList.get(i);
	pref.setOrder(i);
	mHardKeyboardCategory.addPreference(pref);
	}

	getPreferenceScreen().addPreference(mHardKeyboardCategory);
	} else {
	getPreferenceScreen().removePreference(mHardKeyboardCategory);
	}
	}

	private void showKeyboardLayoutDialog(String inputDeviceDescriptor) {
	KeyboardLayoutDialogFragment fragment =
	new KeyboardLayoutDialogFragment(inputDeviceDescriptor);
	fragment.setTargetFragment(this, 0);
	fragment.show(getActivity().getFragmentManager(), "keyboardLayout");
	}

	@Override
	public void onSetupKeyboardLayouts(String inputDeviceDescriptor) {
	final Intent intent = new Intent(Intent.ACTION_MAIN);
	intent.setClass(getActivity(), KeyboardLayoutPickerActivity.class);
	intent.putExtra(KeyboardLayoutPickerFragment.EXTRA_INPUT_DEVICE_DESCRIPTOR,
	inputDeviceDescriptor);
	mIntentWaitingForResult = intent;
	startActivityForResult(intent, 0);
	}

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

	if (mIntentWaitingForResult != null) {
	String inputDeviceDescriptor = mIntentWaitingForResult.getStringExtra(
	KeyboardLayoutPickerFragment.EXTRA_INPUT_DEVICE_DESCRIPTOR);
	mIntentWaitingForResult = null;
	showKeyboardLayoutDialog(inputDeviceDescriptor);
	}
	}

	private void updateGameControllers() {
	if (haveInputDeviceWithVibrator()) {
	getPreferenceScreen().addPreference(mGameControllerCategory);

	CheckBoxPreference chkPref = (CheckBoxPreference)
	mGameControllerCategory.findPreference("vibrate_input_devices");
	chkPref.setChecked(System.getInt(getContentResolver(),
	Settings.System.VIBRATE_INPUT_DEVICES, 1) > 0);
	} else {
	getPreferenceScreen().removePreference(mGameControllerCategory);
	}
	}

	private boolean haveInputDeviceWithVibrator() {
	final int[] devices = InputDevice.getDeviceIds();
	for (int i = 0; i < devices.length; i++) {
	InputDevice device = InputDevice.getDevice(devices[i]);
	if (device != null && !device.isVirtual() && device.getVibrator().hasVibrator()) {
	return true;
	}
	}
	return false;
	}

	private class SettingsObserver extends ContentObserver {
	private Context mContext;

	public SettingsObserver(Handler handler, Context context) {
	super(handler);
	mContext = context;
	}

	@Override public void onChange(boolean selfChange) {
	updateCurrentImeName();
	}

	public void resume() {
	final ContentResolver cr = mContext.getContentResolver();
	cr.registerContentObserver(
	Settings.Secure.getUriFor(Settings.Secure.DEFAULT_INPUT_METHOD), false, this);
	cr.registerContentObserver(Settings.Secure.getUriFor(
	Settings.Secure.SELECTED_INPUT_METHOD_SUBTYPE), false, this);
	}

	public void pause() {
	mContext.getContentResolver().unregisterContentObserver(this);
	}
	}
	}