Move more Accessibility stuff to SettingsLib

    <!-- Launch defaults preference summary with none set [CHAR LIMIT=40] -->

    <string name="launch_defaults_none">No defaults set</string>

    <!-- Text-To-Speech (TTS) settings --><skip />

    <!-- Name of the TTS package as listed by the package manager. -->

    <string name="tts_settings">Text-to-speech settings</string>

    <!-- TTS option item name in the main settings screen -->

    <string name="tts_settings_title">Text-to-speech output</string>

    <!-- On main TTS Settings screen, in default settings section, setting default speech rate for synthesized voice -->

    <string name="tts_default_rate_title">Speech rate</string>

    <!-- On main TTS Settings screen, summary for default speech rate for synthesized voice -->

    <string name="tts_default_rate_summary">Speed at which the text is spoken</string>

    <!-- On main TTS Settings screen, in default settings section, setting default language for synthesized voice -->

    <string name="tts_default_lang_title">Language</string>

    <!-- Entry in the TTS engine language/locale picker, when selected will try to default to the system language [CHAR LIMIT=50] -->

    <string name="tts_lang_use_system">Use system language</string>

    <!-- On main TTS Settings screen, language summary if it can't default to system language [CHAR LIMIT=50] -->

    <string name="tts_lang_not_selected">Language not selected</string>

    <!-- On main TTS Settings screen, summary for default language for synthesized voice -->

    <string name="tts_default_lang_summary">Sets the language-specific voice for the spoken text</string>

    <!-- On main TTS Settings screen, triggers playback of an example of speech synthesis -->

    <string name="tts_play_example_title">Listen to an example</string>

    <!-- On main TTS Settings screen, summary for triggering playback of an example of speech synthesis -->

    <string name="tts_play_example_summary">Play a short demonstration of speech synthesis</string>

    <!-- On main TTS Settings screen, click to install required speech synthesis data -->

    <string name="tts_install_data_title">Install voice data</string>

    <!-- On main TTS Settings screen, summary for click to install required speech synthesis data -->

    <string name="tts_install_data_summary">Install the voice data required for speech synthesis</string>

    <!-- Warning message about security implications of enabling a TTS engine, displayed as a dialog

         message when the user selects to enable an engine. -->

    <string name="tts_engine_security_warning">This speech synthesis engine may be able to collect

        all the text that will be spoken, including personal data like passwords and credit

        card numbers. It comes from the <xliff:g id="tts_plugin_engine_name">%s</xliff:g> engine.

        Enable the use of this speech synthesis engine?</string>

    <!-- Warning message about required internet conectivity for TTS synthesis, displayed as a dialog

         message when the user selects to play an example for network only locale and there's no internet connectivity. -->

    <string name="tts_engine_network_required">This language requires a working network connection for text-to-speech output.</string>

    <!-- Text spoken by the TTS engine as an example if the engine doesn't provide sample text [CHAR LIMIT=100] -->

    <string name="tts_default_sample_string">This is an example of speech synthesis</string>

    <!-- On main TTS Settings screen, title of a field explaining current TTS engine status for

         current default language [CHAR LIMIT=50] -->

    <string name="tts_status_title">Default language status</string>

    <!-- On main TTS Settings screen, current TTS engine status for the current default language,

         selected language is fully supported by the engine [CHAR LIMIT=150]-->

    <string name="tts_status_ok"><xliff:g id="locale" example="English (United States)">%1$s</xliff:g> is fully supported</string>

    <!-- On main TTS Settings screen, current TTS engine status for the current default language,

         selected language is supported by the engine only if there's a working network connection [CHAR LIMIT=150] -->

    <string name="tts_status_requires_network"><xliff:g id="locale" example="English (United States)">%1$s</xliff:g> requires network connection</string>

    <!-- On main TTS Settings screen, current TTS engine status for the current default language,

         selected language is not supported by the engine [CHAR LIMIT=150] -->

    <string name="tts_status_not_supported"><xliff:g id="locale" example="English (United States)">%1$s</xliff:g> is not supported</string>

    <!-- On main TTS Settings screen, current TTS engine status for the current default language,

         tts engine is queried for status [CHAR LIMIT=150] -->

    <string name="tts_status_checking">Checking&#8230;</string>

    <!-- Title for a preference in the main TTS settings screen, which

         launches the settings screen for a given TTS engine when clicked

         [CHAR LIMIT=30]-->

    <string name="tts_engine_settings_title">Settings for <xliff:g id="tts_engine_name">%s</xliff:g></string>

    <!-- [CHAR LIMIT=150] Text for screen readers / accessibility programs for

         the image that launches the TTS engine settings when clicked. -->

    <string name="tts_engine_settings_button">Launch engine settings</string>

    <!-- [CHAR LIMIT=50] The text for the settings section that users to set a

         preferred text to speech engine -->

    <string name="tts_engine_preference_section_title">Preferred engine</string>

    <!-- [CHAR LIMIT=50] Title of the settings section that displays general preferences

         that are applicable to all engines, such as the speech rate -->

    <string name="tts_general_section_title">General</string>

    <!-- Default speech rate choices -->

    <string-array name="tts_rate_entries">

        <item>Very slow</item>

        <item>Slow</item>

        <item>Normal</item>

        <item>Fast</item>

        <item>Faster</item>

        <item>Very fast</item>

        <item>Rapid</item>

        <item>Very rapid</item>

        <item>Fastest</item>

    </string-array>

    <!-- Do not translate. -->

    <string-array name="tts_rate_values">

        <item>60</item>

        <item>80</item>

        <item>100</item>

        <item>150</item>

        <item>200</item>

        <item>250</item>

        <item>300</item>

        <item>350</item>

        <item>400</item>

    </string-array>

    <!-- Do not translate. -->

    <string-array name="tts_demo_strings" translatable="false">

        <item>This is an example of speech synthesis in English.</item>

        <item>Voici un échantillon de synthèse vocale en français.</item>

        <item>Dies ist ein Beispiel für Sprachsynthese in Deutsch.</item>

        <item>Questo è un esempio di sintesi vocale in italiano.</item>

        <item>Este es un ejemplo de síntesis de voz en español.</item>

        <item>이것은 한국어 음성 합성의 예입니다.</item>

    </string-array>

    <!-- Do not translate. -->

    <string-array name="tts_demo_string_langs" translatable="false">

        <item>eng</item>

        <item>fra</item>

        <item>deu</item>

        <item>ita</item>

        <item>spa</item>

        <item>kor</item>

    </string-array>

</resources>

package com.android.settingslib.accessibility;

import android.accessibilityservice.AccessibilityServiceInfo;

import android.content.ComponentName;

import android.content.Context;

import android.content.pm.ResolveInfo;

import android.content.res.Configuration;

import android.content.res.Resources;

import android.provider.Settings;

import android.text.TextUtils;

import android.util.ArraySet;

import android.view.accessibility.AccessibilityManager;

import java.util.Collections;

import java.util.HashSet;

import java.util.List;

import java.util.Locale;

import java.util.Set;

            return Collections.emptySet();

        }

        final Set<ComponentName> enabledServices = new HashSet<ComponentName>();

        final Set<ComponentName> enabledServices = new HashSet<>();

        final TextUtils.SimpleStringSplitter colonSplitter = sStringColonSplitter;

        colonSplitter.setString(enabledServicesSetting);

        final Context langContext = context.createConfigurationContext(config);

        return langContext.getText(resId);

    }

    public static void setAccessibilityServiceState(Context context, ComponentName toggledService,

            boolean enabled) {

        // Parse the enabled services.

        Set<ComponentName> enabledServices = AccessibilityUtils.getEnabledServicesFromSettings(

                context);

        if (enabledServices.isEmpty()) {

            enabledServices = new ArraySet<>(1);

        }

        // Determine enabled services and accessibility state.

        boolean accessibilityEnabled = false;

        if (enabled) {

            enabledServices.add(toggledService);

            // Enabling at least one service enables accessibility.

            accessibilityEnabled = true;

        } else {

            enabledServices.remove(toggledService);

            // Check how many enabled and installed services are present.

            Set<ComponentName> installedServices = getInstalledServices(context);

            for (ComponentName enabledService : enabledServices) {

                if (installedServices.contains(enabledService)) {

                    // Disabling the last service disables accessibility.

                    accessibilityEnabled = true;

                    break;

                }

            }

        }

        // Update the enabled services setting.

        StringBuilder enabledServicesBuilder = new StringBuilder();

        // Keep the enabled services even if they are not installed since we

        // have no way to know whether the application restore process has

        // completed. In general the system should be responsible for the

        // clean up not settings.

        for (ComponentName enabledService : enabledServices) {

            enabledServicesBuilder.append(enabledService.flattenToString());

            enabledServicesBuilder.append(

                    AccessibilityUtils.ENABLED_ACCESSIBILITY_SERVICES_SEPARATOR);

        }

        final int enabledServicesBuilderLength = enabledServicesBuilder.length();

        if (enabledServicesBuilderLength > 0) {

            enabledServicesBuilder.deleteCharAt(enabledServicesBuilderLength - 1);

        }

        Settings.Secure.putString(context.getContentResolver(),

                Settings.Secure.ENABLED_ACCESSIBILITY_SERVICES,

                enabledServicesBuilder.toString());

        // Update accessibility enabled.

        Settings.Secure.putInt(context.getContentResolver(),

                Settings.Secure.ACCESSIBILITY_ENABLED, accessibilityEnabled ? 1 : 0);

    }

    private static Set<ComponentName> getInstalledServices(Context context) {

        final Set<ComponentName> installedServices = new HashSet<>();

        installedServices.clear();

        final List<AccessibilityServiceInfo> installedServiceInfos =

                AccessibilityManager.getInstance(context)

                        .getInstalledAccessibilityServiceList();

        if (installedServiceInfos == null) {

            return installedServices;

        }

        for (final AccessibilityServiceInfo info : installedServiceInfos) {

            final ResolveInfo resolveInfo = info.getResolveInfo();

            final ComponentName installedService = new ComponentName(

                    resolveInfo.serviceInfo.packageName,

                    resolveInfo.serviceInfo.name);

            installedServices.add(installedService);

        }

        return installedServices;

    }

}