src/com/android/settings/accessibility/ToggleDaltonizerPreferenceFragment.java - platform/packages/apps/Settings - Git at Google

 /*
  * Copyright (C) 2013 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.accessibility;

 import static com.android.internal.accessibility.AccessibilityShortcutController.DALTONIZER_COMPONENT_NAME;

 import android.app.Dialog;
 import android.app.settings.SettingsEnums;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.res.Resources;
 import android.os.Bundle;
 import android.provider.Settings;
 import android.text.TextUtils;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.CheckBox;
 import android.widget.Switch;

 import androidx.appcompat.app.AlertDialog;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceScreen;

 import com.android.settings.R;
 import com.android.settings.accessibility.AccessibilityUtil.State;
 import com.android.settings.accessibility.AccessibilityUtil.UserShortcutType;
 import com.android.settings.search.BaseSearchIndexProvider;
 import com.android.settings.widget.SwitchBar;
 import com.android.settingslib.core.AbstractPreferenceController;
 import com.android.settingslib.core.lifecycle.Lifecycle;
 import com.android.settingslib.search.SearchIndexable;
 import com.android.settingslib.widget.RadioButtonPreference;

 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 import java.util.stream.Collectors;

 @SearchIndexable
 public final class ToggleDaltonizerPreferenceFragment extends ToggleFeaturePreferenceFragment
         implements DaltonizerRadioButtonPreferenceController.OnChangeListener,
         SwitchBar.OnSwitchChangeListener, ShortcutPreference.OnClickListener {

     private static final String ENABLED = Settings.Secure.ACCESSIBILITY_DISPLAY_DALTONIZER_ENABLED;
     private static final String PREFERENCE_KEY = "daltonizer_mode_deuteranomaly";
     private static final String EXTRA_SHORTCUT_TYPE = "shortcut_type";
     private static final String KEY_SHORTCUT_PREFERENCE = "shortcut_preference";
     private static final int DIALOG_ID_EDIT_SHORTCUT = 1;
     private static final List<AbstractPreferenceController> sControllers = new ArrayList<>();
     private ShortcutPreference mShortcutPreference;
     private int mUserShortcutType = UserShortcutType.DEFAULT;
     private CheckBox mSoftwareTypeCheckBox;
     private CheckBox mHardwareTypeCheckBox;

     private static List<AbstractPreferenceController> buildPreferenceControllers(Context context,
             Lifecycle lifecycle) {
         if (sControllers.size() == 0) {
             final Resources resources = context.getResources();
             final String[] daltonizerKeys = resources.getStringArray(
                     R.array.daltonizer_mode_keys);

             for (int i = 0; i < daltonizerKeys.length; i++) {
                 sControllers.add(new DaltonizerRadioButtonPreferenceController(
                         context, lifecycle, daltonizerKeys[i]));
             }
         }
         return sControllers;
     }

     @Override
     public void onCheckedChanged(Preference preference) {
         for (AbstractPreferenceController controller : sControllers) {
             controller.updateState(preference);
         }
     }

     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {
         initShortcutPreference(savedInstanceState);
         return super.onCreateView(inflater, container, savedInstanceState);
     }

     @Override
     public void onSaveInstanceState(Bundle outState) {
         outState.putInt(EXTRA_SHORTCUT_TYPE, mUserShortcutType);
         super.onSaveInstanceState(outState);
     }

     @Override
     public void onResume() {
         super.onResume();
         for (AbstractPreferenceController controller :
                 buildPreferenceControllers(getPrefContext(), getSettingsLifecycle())) {
             ((DaltonizerRadioButtonPreferenceController) controller).setOnChangeListener(this);
             ((DaltonizerRadioButtonPreferenceController) controller).displayPreference(
                     getPreferenceScreen());
         }
         updateShortcutPreference();
     }

     @Override
     public void onPause() {
         super.onPause();
         for (AbstractPreferenceController controller :
                 buildPreferenceControllers(getPrefContext(), getSettingsLifecycle())) {
             ((DaltonizerRadioButtonPreferenceController) controller).setOnChangeListener(null);
         }
     }

     @Override
     public Dialog onCreateDialog(int dialogId) {
         if (dialogId == DIALOG_ID_EDIT_SHORTCUT) {
             final CharSequence dialogTitle = getActivity().getString(
                     R.string.accessibility_shortcut_edit_dialog_title_daltonizer);
             final AlertDialog dialog = AccessibilityEditDialogUtils.showEditShortcutDialog(
                     getActivity(),
                     dialogTitle, this::callOnAlertDialogCheckboxClicked);
             initializeDialogCheckBox(dialog);
             return dialog;
         }
         throw new IllegalArgumentException("Unsupported dialogId " + dialogId);
     }

     private void initializeDialogCheckBox(AlertDialog dialog) {
         final View dialogSoftwareView = dialog.findViewById(R.id.software_shortcut);
         mSoftwareTypeCheckBox = dialogSoftwareView.findViewById(R.id.checkbox);
         final View dialogHardwareView = dialog.findViewById(R.id.hardware_shortcut);
         mHardwareTypeCheckBox = dialogHardwareView.findViewById(R.id.checkbox);
         updateAlertDialogCheckState();
         updateAlertDialogEnableState();
     }

     private void updateAlertDialogCheckState() {
         updateCheckStatus(mSoftwareTypeCheckBox, UserShortcutType.SOFTWARE);
         updateCheckStatus(mHardwareTypeCheckBox, UserShortcutType.HARDWARE);
     }

     private void updateAlertDialogEnableState() {
         if (!mSoftwareTypeCheckBox.isChecked()) {
             mHardwareTypeCheckBox.setEnabled(false);
         } else if (!mHardwareTypeCheckBox.isChecked()) {
             mSoftwareTypeCheckBox.setEnabled(false);
         } else {
             mSoftwareTypeCheckBox.setEnabled(true);
             mHardwareTypeCheckBox.setEnabled(true);
         }
     }

     private void updateCheckStatus(CheckBox checkBox, @UserShortcutType int type) {
         checkBox.setChecked((mUserShortcutType & type) == type);
         checkBox.setOnClickListener(v -> {
             updateUserShortcutType(/* saveChanges= */ false);
             updateAlertDialogEnableState();
         });
     }

     private void updateUserShortcutType(boolean saveChanges) {
         mUserShortcutType = UserShortcutType.DEFAULT;
         if (mSoftwareTypeCheckBox.isChecked()) {
             mUserShortcutType |= UserShortcutType.SOFTWARE;
         }
         if (mHardwareTypeCheckBox.isChecked()) {
             mUserShortcutType |= UserShortcutType.HARDWARE;
         }
         if (saveChanges) {
             setUserShortcutType(getPrefContext(), mUserShortcutType);
         }
     }

     private void setUserShortcutType(Context context, int type) {
         Set<String> info = SharedPreferenceUtils.getUserShortcutType(context);
         if (info.isEmpty()) {
             info = new HashSet<>();
         } else {
             final Set<String> filtered = info.stream().filter(
                     str -> str.contains(getComponentName().flattenToString())).collect(
                     Collectors.toSet());
             info.removeAll(filtered);
         }
         final AccessibilityUserShortcutType shortcut = new AccessibilityUserShortcutType(
                 getComponentName().flattenToString(), type);
         info.add(shortcut.flattenToString());
         SharedPreferenceUtils.setUserShortcutType(context, info);
     }

     private String getShortcutTypeSummary(Context context) {
         final int shortcutType = getUserShortcutType(context, UserShortcutType.SOFTWARE);
         final CharSequence softwareTitle =
                 context.getText(AccessibilityUtil.isGestureNavigateEnabled(context)
                         ? R.string.accessibility_shortcut_edit_dialog_title_software_gesture
                         : R.string.accessibility_shortcut_edit_dialog_title_software);

         List<CharSequence> list = new ArrayList<>();
         if ((shortcutType & UserShortcutType.SOFTWARE) == UserShortcutType.SOFTWARE) {
             list.add(softwareTitle);
         }
         if ((shortcutType & UserShortcutType.HARDWARE) == UserShortcutType.HARDWARE) {
             final CharSequence hardwareTitle = context.getText(
                     R.string.accessibility_shortcut_edit_dialog_title_hardware);
             list.add(hardwareTitle);
         }

         // Show software shortcut if first time to use.
         if (list.isEmpty()) {
             list.add(softwareTitle);
         }
         final String joinStrings = TextUtils.join(/* delimiter= */", ", list);
         return AccessibilityUtil.capitalize(joinStrings);
     }

     private int getUserShortcutType(Context context, @UserShortcutType int defaultValue) {
         final Set<String> info = SharedPreferenceUtils.getUserShortcutType(context);
         final String componentName = getComponentName().flattenToString();
         final Set<String> filtered = info.stream().filter(
                 str -> str.contains(componentName)).collect(
                 Collectors.toSet());
         if (filtered.isEmpty()) {
             return defaultValue;
         }

         final String str = (String) filtered.toArray()[0];
         final AccessibilityUserShortcutType shortcut = new AccessibilityUserShortcutType(str);
         return shortcut.getUserShortcutType();
     }

     private void callOnAlertDialogCheckboxClicked(DialogInterface dialog, int which) {
         updateUserShortcutType(/* saveChanges= */ true);
         mShortcutPreference.setSummary(
                 getShortcutTypeSummary(getPrefContext()));
     }

     @Override
     public int getMetricsCategory() {
         return SettingsEnums.ACCESSIBILITY_TOGGLE_DALTONIZER;
     }

     @Override
     public int getDialogMetricsCategory(int dialogId) {
         if (dialogId == DIALOG_ID_EDIT_SHORTCUT) {
             return SettingsEnums.DIALOG_DALTONIZER_EDIT_SHORTCUT;
         }
         return 0;
     }

     @Override
     public int getHelpResource() {
         return R.string.help_url_color_correction;
     }

     @Override
     protected int getPreferenceScreenResId() {
         return R.xml.accessibility_daltonizer_settings;
     }

     @Override
     protected void onPreferenceToggled(String preferenceKey, boolean enabled) {
         Settings.Secure.putInt(getContentResolver(), ENABLED, enabled ? State.OFF : State.ON);
     }

     @Override
     protected void onRemoveSwitchBarToggleSwitch() {
         super.onRemoveSwitchBarToggleSwitch();
         mSwitchBar.removeOnSwitchChangeListener(this);
     }

     @Override
     protected void updateSwitchBarText(SwitchBar switchBar) {
         final String switchBarText = getString(R.string.accessibility_service_master_switch_title,
                 getString(R.string.accessibility_display_daltonizer_preference_title));
         switchBar.setSwitchBarText(switchBarText, switchBarText);
     }

     @Override
     public void onSwitchChanged(Switch switchView, boolean isChecked) {
         Settings.Secure.putInt(getContentResolver(), ENABLED, isChecked ? State.ON : State.OFF);
     }

     @Override
     protected void onInstallSwitchBarToggleSwitch() {
         super.onInstallSwitchBarToggleSwitch();
         mSwitchBar.setCheckedInternal(
                 Settings.Secure.getInt(getContentResolver(), ENABLED, State.OFF) == State.ON);
         mSwitchBar.addOnSwitchChangeListener(this);
     }

     @Override
     public void onCheckboxClicked(ShortcutPreference preference) {
         if (preference.getChecked()) {
             // TODO(b/142531156): Replace UserShortcutType.SOFTWARE value with dialog shortcut
             //  preferred key.
             AccessibilityUtil.optInValueToSettings(getContext(), UserShortcutType.SOFTWARE,
                     getComponentName());
         } else {
             // TODO(b/142531156): Replace UserShortcutType.SOFTWARE value with dialog shortcut
             //  preferred key.
             AccessibilityUtil.optOutValueFromSettings(getContext(), UserShortcutType.SOFTWARE,
                     getComponentName());
         }
     }

     @Override
     public void onSettingsClicked(ShortcutPreference preference) {
         mUserShortcutType = getUserShortcutType(getPrefContext(),
                 UserShortcutType.SOFTWARE);
         showDialog(DIALOG_ID_EDIT_SHORTCUT);
     }

     private void initShortcutPreference(Bundle savedInstanceState) {
         mUserShortcutType = getUserShortcutType(getPrefContext(),
                 UserShortcutType.SOFTWARE);

         // Restore the user shortcut type
         if (savedInstanceState != null && savedInstanceState.containsKey(EXTRA_SHORTCUT_TYPE)) {
             mUserShortcutType = savedInstanceState.getInt(EXTRA_SHORTCUT_TYPE,
                     UserShortcutType.SOFTWARE);
         }

         // Initial ShortcutPreference widget
         final PreferenceScreen preferenceScreen = getPreferenceScreen();
         mShortcutPreference = new ShortcutPreference(
                 preferenceScreen.getContext(), null);
         mShortcutPreference.setPersistent(false);
         mShortcutPreference.setKey(getShortcutPreferenceKey());
         mShortcutPreference.setTitle(R.string.accessibility_shortcut_title);
         mShortcutPreference.setSummary(getShortcutTypeSummary(getPrefContext()));
         mShortcutPreference.setOnClickListener(this);
         final RadioButtonPreference radioButtonPreference = findPreference(PREFERENCE_KEY);
         // Put the shortcutPreference before radioButtonPreference.
         mShortcutPreference.setOrder(radioButtonPreference.getOrder() - 1);
         // TODO(b/142530063): Check the new key to decide whether checkbox should be checked.
         preferenceScreen.addPreference(mShortcutPreference);
     }

     private void updateShortcutPreference() {
         final PreferenceScreen preferenceScreen = getPreferenceScreen();
         final ShortcutPreference shortcutPreference = preferenceScreen.findPreference(
                 getShortcutPreferenceKey());

         if (shortcutPreference != null) {
             // TODO(b/142531156): Replace UserShortcutType.SOFTWARE value with dialog shortcut
             //  preferred key.
             shortcutPreference.setChecked(
                     AccessibilityUtil.hasValueInSettings(getContext(),
                             UserShortcutType.SOFTWARE,
                             getComponentName()));
         }

     }

     private String getShortcutPreferenceKey() {
         return KEY_SHORTCUT_PREFERENCE;
     }

     private ComponentName getComponentName() {
         return DALTONIZER_COMPONENT_NAME;
     }

     public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
             new BaseSearchIndexProvider(R.xml.accessibility_daltonizer_settings);
 }
	/*
	* Copyright (C) 2013 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.accessibility;

	import static com.android.internal.accessibility.AccessibilityShortcutController.DALTONIZER_COMPONENT_NAME;

	import android.app.Dialog;
	import android.app.settings.SettingsEnums;
	import android.content.ComponentName;
	import android.content.Context;
	import android.content.DialogInterface;
	import android.content.res.Resources;
	import android.os.Bundle;
	import android.provider.Settings;
	import android.text.TextUtils;
	import android.view.LayoutInflater;
	import android.view.View;
	import android.view.ViewGroup;
	import android.widget.CheckBox;
	import android.widget.Switch;

	import androidx.appcompat.app.AlertDialog;
	import androidx.preference.Preference;
	import androidx.preference.PreferenceScreen;

	import com.android.settings.R;
	import com.android.settings.accessibility.AccessibilityUtil.State;
	import com.android.settings.accessibility.AccessibilityUtil.UserShortcutType;
	import com.android.settings.search.BaseSearchIndexProvider;
	import com.android.settings.widget.SwitchBar;
	import com.android.settingslib.core.AbstractPreferenceController;
	import com.android.settingslib.core.lifecycle.Lifecycle;
	import com.android.settingslib.search.SearchIndexable;
	import com.android.settingslib.widget.RadioButtonPreference;

	import java.util.ArrayList;
	import java.util.HashSet;
	import java.util.List;
	import java.util.Set;
	import java.util.stream.Collectors;

	@SearchIndexable
	public final class ToggleDaltonizerPreferenceFragment extends ToggleFeaturePreferenceFragment
	implements DaltonizerRadioButtonPreferenceController.OnChangeListener,
	SwitchBar.OnSwitchChangeListener, ShortcutPreference.OnClickListener {

	private static final String ENABLED = Settings.Secure.ACCESSIBILITY_DISPLAY_DALTONIZER_ENABLED;
	private static final String PREFERENCE_KEY = "daltonizer_mode_deuteranomaly";
	private static final String EXTRA_SHORTCUT_TYPE = "shortcut_type";
	private static final String KEY_SHORTCUT_PREFERENCE = "shortcut_preference";
	private static final int DIALOG_ID_EDIT_SHORTCUT = 1;
	private static final List<AbstractPreferenceController> sControllers = new ArrayList<>();
	private ShortcutPreference mShortcutPreference;
	private int mUserShortcutType = UserShortcutType.DEFAULT;
	private CheckBox mSoftwareTypeCheckBox;
	private CheckBox mHardwareTypeCheckBox;

	private static List<AbstractPreferenceController> buildPreferenceControllers(Context context,
	Lifecycle lifecycle) {
	if (sControllers.size() == 0) {
	final Resources resources = context.getResources();
	final String[] daltonizerKeys = resources.getStringArray(
	R.array.daltonizer_mode_keys);

	for (int i = 0; i < daltonizerKeys.length; i++) {
	sControllers.add(new DaltonizerRadioButtonPreferenceController(
	context, lifecycle, daltonizerKeys[i]));
	}
	}
	return sControllers;
	}

	@Override
	public void onCheckedChanged(Preference preference) {
	for (AbstractPreferenceController controller : sControllers) {
	controller.updateState(preference);
	}
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
	Bundle savedInstanceState) {
	initShortcutPreference(savedInstanceState);
	return super.onCreateView(inflater, container, savedInstanceState);
	}

	@Override
	public void onSaveInstanceState(Bundle outState) {
	outState.putInt(EXTRA_SHORTCUT_TYPE, mUserShortcutType);
	super.onSaveInstanceState(outState);
	}

	@Override
	public void onResume() {
	super.onResume();
	for (AbstractPreferenceController controller :
	buildPreferenceControllers(getPrefContext(), getSettingsLifecycle())) {
	((DaltonizerRadioButtonPreferenceController) controller).setOnChangeListener(this);
	((DaltonizerRadioButtonPreferenceController) controller).displayPreference(
	getPreferenceScreen());
	}
	updateShortcutPreference();
	}

	@Override
	public void onPause() {
	super.onPause();
	for (AbstractPreferenceController controller :
	buildPreferenceControllers(getPrefContext(), getSettingsLifecycle())) {
	((DaltonizerRadioButtonPreferenceController) controller).setOnChangeListener(null);
	}
	}

	@Override
	public Dialog onCreateDialog(int dialogId) {
	if (dialogId == DIALOG_ID_EDIT_SHORTCUT) {
	final CharSequence dialogTitle = getActivity().getString(
	R.string.accessibility_shortcut_edit_dialog_title_daltonizer);
	final AlertDialog dialog = AccessibilityEditDialogUtils.showEditShortcutDialog(
	getActivity(),
	dialogTitle, this::callOnAlertDialogCheckboxClicked);
	initializeDialogCheckBox(dialog);
	return dialog;
	}
	throw new IllegalArgumentException("Unsupported dialogId " + dialogId);
	}

	private void initializeDialogCheckBox(AlertDialog dialog) {
	final View dialogSoftwareView = dialog.findViewById(R.id.software_shortcut);
	mSoftwareTypeCheckBox = dialogSoftwareView.findViewById(R.id.checkbox);
	final View dialogHardwareView = dialog.findViewById(R.id.hardware_shortcut);
	mHardwareTypeCheckBox = dialogHardwareView.findViewById(R.id.checkbox);
	updateAlertDialogCheckState();
	updateAlertDialogEnableState();
	}

	private void updateAlertDialogCheckState() {
	updateCheckStatus(mSoftwareTypeCheckBox, UserShortcutType.SOFTWARE);
	updateCheckStatus(mHardwareTypeCheckBox, UserShortcutType.HARDWARE);
	}

	private void updateAlertDialogEnableState() {
	if (!mSoftwareTypeCheckBox.isChecked()) {
	mHardwareTypeCheckBox.setEnabled(false);
	} else if (!mHardwareTypeCheckBox.isChecked()) {
	mSoftwareTypeCheckBox.setEnabled(false);
	} else {
	mSoftwareTypeCheckBox.setEnabled(true);
	mHardwareTypeCheckBox.setEnabled(true);
	}
	}

	private void updateCheckStatus(CheckBox checkBox, @UserShortcutType int type) {
	checkBox.setChecked((mUserShortcutType & type) == type);
	checkBox.setOnClickListener(v -> {
	updateUserShortcutType(/* saveChanges= */ false);
	updateAlertDialogEnableState();
	});
	}

	private void updateUserShortcutType(boolean saveChanges) {
	mUserShortcutType = UserShortcutType.DEFAULT;
	if (mSoftwareTypeCheckBox.isChecked()) {
	mUserShortcutType \|= UserShortcutType.SOFTWARE;
	}
	if (mHardwareTypeCheckBox.isChecked()) {
	mUserShortcutType \|= UserShortcutType.HARDWARE;
	}
	if (saveChanges) {
	setUserShortcutType(getPrefContext(), mUserShortcutType);
	}
	}

	private void setUserShortcutType(Context context, int type) {
	Set<String> info = SharedPreferenceUtils.getUserShortcutType(context);
	if (info.isEmpty()) {
	info = new HashSet<>();
	} else {
	final Set<String> filtered = info.stream().filter(
	str -> str.contains(getComponentName().flattenToString())).collect(
	Collectors.toSet());
	info.removeAll(filtered);
	}
	final AccessibilityUserShortcutType shortcut = new AccessibilityUserShortcutType(
	getComponentName().flattenToString(), type);
	info.add(shortcut.flattenToString());
	SharedPreferenceUtils.setUserShortcutType(context, info);
	}

	private String getShortcutTypeSummary(Context context) {
	final int shortcutType = getUserShortcutType(context, UserShortcutType.SOFTWARE);
	final CharSequence softwareTitle =
	context.getText(AccessibilityUtil.isGestureNavigateEnabled(context)
	? R.string.accessibility_shortcut_edit_dialog_title_software_gesture
	: R.string.accessibility_shortcut_edit_dialog_title_software);

	List<CharSequence> list = new ArrayList<>();
	if ((shortcutType & UserShortcutType.SOFTWARE) == UserShortcutType.SOFTWARE) {
	list.add(softwareTitle);
	}
	if ((shortcutType & UserShortcutType.HARDWARE) == UserShortcutType.HARDWARE) {
	final CharSequence hardwareTitle = context.getText(
	R.string.accessibility_shortcut_edit_dialog_title_hardware);
	list.add(hardwareTitle);
	}

	// Show software shortcut if first time to use.
	if (list.isEmpty()) {
	list.add(softwareTitle);
	}
	final String joinStrings = TextUtils.join(/* delimiter= */", ", list);
	return AccessibilityUtil.capitalize(joinStrings);
	}

	private int getUserShortcutType(Context context, @UserShortcutType int defaultValue) {
	final Set<String> info = SharedPreferenceUtils.getUserShortcutType(context);
	final String componentName = getComponentName().flattenToString();
	final Set<String> filtered = info.stream().filter(
	str -> str.contains(componentName)).collect(
	Collectors.toSet());
	if (filtered.isEmpty()) {
	return defaultValue;
	}

	final String str = (String) filtered.toArray()[0];
	final AccessibilityUserShortcutType shortcut = new AccessibilityUserShortcutType(str);
	return shortcut.getUserShortcutType();
	}

	private void callOnAlertDialogCheckboxClicked(DialogInterface dialog, int which) {
	updateUserShortcutType(/* saveChanges= */ true);
	mShortcutPreference.setSummary(
	getShortcutTypeSummary(getPrefContext()));
	}

	@Override
	public int getMetricsCategory() {
	return SettingsEnums.ACCESSIBILITY_TOGGLE_DALTONIZER;
	}

	@Override
	public int getDialogMetricsCategory(int dialogId) {
	if (dialogId == DIALOG_ID_EDIT_SHORTCUT) {
	return SettingsEnums.DIALOG_DALTONIZER_EDIT_SHORTCUT;
	}
	return 0;
	}

	@Override
	public int getHelpResource() {
	return R.string.help_url_color_correction;
	}

	@Override
	protected int getPreferenceScreenResId() {
	return R.xml.accessibility_daltonizer_settings;
	}

	@Override
	protected void onPreferenceToggled(String preferenceKey, boolean enabled) {
	Settings.Secure.putInt(getContentResolver(), ENABLED, enabled ? State.OFF : State.ON);
	}

	@Override
	protected void onRemoveSwitchBarToggleSwitch() {
	super.onRemoveSwitchBarToggleSwitch();
	mSwitchBar.removeOnSwitchChangeListener(this);
	}

	@Override
	protected void updateSwitchBarText(SwitchBar switchBar) {
	final String switchBarText = getString(R.string.accessibility_service_master_switch_title,
	getString(R.string.accessibility_display_daltonizer_preference_title));
	switchBar.setSwitchBarText(switchBarText, switchBarText);
	}

	@Override
	public void onSwitchChanged(Switch switchView, boolean isChecked) {
	Settings.Secure.putInt(getContentResolver(), ENABLED, isChecked ? State.ON : State.OFF);
	}

	@Override
	protected void onInstallSwitchBarToggleSwitch() {
	super.onInstallSwitchBarToggleSwitch();
	mSwitchBar.setCheckedInternal(
	Settings.Secure.getInt(getContentResolver(), ENABLED, State.OFF) == State.ON);
	mSwitchBar.addOnSwitchChangeListener(this);
	}

	@Override
	public void onCheckboxClicked(ShortcutPreference preference) {
	if (preference.getChecked()) {
	// TODO(b/142531156): Replace UserShortcutType.SOFTWARE value with dialog shortcut
	// preferred key.
	AccessibilityUtil.optInValueToSettings(getContext(), UserShortcutType.SOFTWARE,
	getComponentName());
	} else {
	// TODO(b/142531156): Replace UserShortcutType.SOFTWARE value with dialog shortcut
	// preferred key.
	AccessibilityUtil.optOutValueFromSettings(getContext(), UserShortcutType.SOFTWARE,
	getComponentName());
	}
	}

	@Override
	public void onSettingsClicked(ShortcutPreference preference) {
	mUserShortcutType = getUserShortcutType(getPrefContext(),
	UserShortcutType.SOFTWARE);
	showDialog(DIALOG_ID_EDIT_SHORTCUT);
	}

	private void initShortcutPreference(Bundle savedInstanceState) {
	mUserShortcutType = getUserShortcutType(getPrefContext(),
	UserShortcutType.SOFTWARE);

	// Restore the user shortcut type
	if (savedInstanceState != null && savedInstanceState.containsKey(EXTRA_SHORTCUT_TYPE)) {
	mUserShortcutType = savedInstanceState.getInt(EXTRA_SHORTCUT_TYPE,
	UserShortcutType.SOFTWARE);
	}

	// Initial ShortcutPreference widget
	final PreferenceScreen preferenceScreen = getPreferenceScreen();
	mShortcutPreference = new ShortcutPreference(
	preferenceScreen.getContext(), null);
	mShortcutPreference.setPersistent(false);
	mShortcutPreference.setKey(getShortcutPreferenceKey());
	mShortcutPreference.setTitle(R.string.accessibility_shortcut_title);
	mShortcutPreference.setSummary(getShortcutTypeSummary(getPrefContext()));
	mShortcutPreference.setOnClickListener(this);
	final RadioButtonPreference radioButtonPreference = findPreference(PREFERENCE_KEY);
	// Put the shortcutPreference before radioButtonPreference.
	mShortcutPreference.setOrder(radioButtonPreference.getOrder() - 1);
	// TODO(b/142530063): Check the new key to decide whether checkbox should be checked.
	preferenceScreen.addPreference(mShortcutPreference);
	}

	private void updateShortcutPreference() {
	final PreferenceScreen preferenceScreen = getPreferenceScreen();
	final ShortcutPreference shortcutPreference = preferenceScreen.findPreference(
	getShortcutPreferenceKey());

	if (shortcutPreference != null) {
	// TODO(b/142531156): Replace UserShortcutType.SOFTWARE value with dialog shortcut
	// preferred key.
	shortcutPreference.setChecked(
	AccessibilityUtil.hasValueInSettings(getContext(),
	UserShortcutType.SOFTWARE,
	getComponentName()));
	}

	}

	private String getShortcutPreferenceKey() {
	return KEY_SHORTCUT_PREFERENCE;
	}

	private ComponentName getComponentName() {
	return DALTONIZER_COMPONENT_NAME;
	}

	public static final BaseSearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
	new BaseSearchIndexProvider(R.xml.accessibility_daltonizer_settings);
	}