| /* |
| * Copyright (C) 2021 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.car.settings.accessibility; |
| |
| import android.accessibilityservice.AccessibilityServiceInfo; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.pm.ServiceInfo; |
| import android.os.UserHandle; |
| import android.view.accessibility.AccessibilityManager; |
| |
| import androidx.annotation.Nullable; |
| |
| import com.android.car.settings.R; |
| import com.android.internal.accessibility.util.AccessibilityUtils; |
| |
| import java.util.List; |
| |
| /** |
| * Hosts utility methods and constants for screen reader related settings. |
| */ |
| public class ScreenReaderUtils { |
| |
| /** |
| * Returns whether the system screen reader is installed on the device. |
| */ |
| static boolean isScreenReaderInstalled(Context context) { |
| return getScreenReaderServiceInfo(context) != null; |
| } |
| |
| /** |
| * Returns whether the default screen reader is currently enabled on the device. |
| */ |
| static boolean isScreenReaderEnabled(Context context) { |
| ComponentName screenReaderComponent = getScreenReaderComponentName(context); |
| if (screenReaderComponent == null) { |
| return false; |
| } |
| return AccessibilityUtils.getEnabledServicesFromSettings(context, |
| UserHandle.myUserId()).contains(screenReaderComponent); |
| } |
| |
| /** |
| * Returns the name of the system default screen reader if it is installed. Returns an empty |
| * string if not. |
| */ |
| @Nullable |
| static CharSequence getScreenReaderName(Context context) { |
| AccessibilityServiceInfo serviceInfo = getScreenReaderServiceInfo(context); |
| if (serviceInfo == null) { |
| return ""; |
| } |
| |
| return serviceInfo.getResolveInfo().loadLabel(context.getPackageManager()); |
| } |
| |
| /** |
| * Returns the description of the system default screen reader if it is installed. Returns an |
| * empty string if not. |
| */ |
| static CharSequence getScreenReaderDescription(Context context) { |
| AccessibilityServiceInfo serviceInfo = getScreenReaderServiceInfo(context); |
| if (serviceInfo == null) { |
| return ""; |
| } |
| |
| String description = serviceInfo.loadDescription(context.getPackageManager()); |
| return description != null ? description : ""; |
| } |
| |
| /** |
| * Returns the settings activity ComponentName of the system default screen reader if the screen |
| * reader is installed and a settings activity exists. Returns {@code null} otherwise. |
| */ |
| @Nullable |
| static ComponentName getScreenReaderSettingsActivity(Context context) { |
| AccessibilityServiceInfo serviceInfo = getScreenReaderServiceInfo(context); |
| if (serviceInfo == null) { |
| return null; |
| } |
| |
| String settingsActivity = serviceInfo.getSettingsActivityName(); |
| if (settingsActivity == null || settingsActivity.isEmpty()) { |
| return null; |
| } |
| |
| return new ComponentName(getScreenReaderComponentName(context).getPackageName(), |
| settingsActivity); |
| } |
| |
| /** |
| * Sets the screen reader enabled state. This should only be called if the screen reader is |
| * installed. |
| */ |
| static void setScreenReaderEnabled(Context context, boolean enabled) { |
| ComponentName screenReaderComponent = getScreenReaderComponentName(context); |
| if (screenReaderComponent == null) { |
| return; |
| } |
| |
| AccessibilityUtils.setAccessibilityServiceState(context, |
| getScreenReaderComponentName(context), enabled, |
| UserHandle.myUserId()); |
| } |
| |
| private static ComponentName getScreenReaderComponentName(Context context) { |
| return ComponentName.unflattenFromString( |
| context.getString(R.string.config_default_screen_reader)); |
| } |
| |
| @Nullable |
| private static AccessibilityServiceInfo getScreenReaderServiceInfo(Context context) { |
| AccessibilityManager accessibilityManager = context.getSystemService( |
| AccessibilityManager.class); |
| if (accessibilityManager == null) { |
| return null; |
| } |
| |
| List<AccessibilityServiceInfo> accessibilityServices = |
| accessibilityManager.getInstalledAccessibilityServiceList(); |
| if (accessibilityServices == null) { |
| return null; |
| } |
| |
| ComponentName screenReaderComponent = getScreenReaderComponentName(context); |
| if (screenReaderComponent == null) { |
| return null; |
| } |
| |
| for (AccessibilityServiceInfo info : accessibilityServices) { |
| ServiceInfo serviceInfo = info.getResolveInfo().serviceInfo; |
| if (screenReaderComponent.getPackageName().equals(serviceInfo.packageName) |
| && screenReaderComponent.getClassName().equals(serviceInfo.name)) { |
| return info; |
| } |
| } |
| |
| return null; |
| } |
| |
| } |