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

 /*
  * Copyright (C) 2019 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 android.view.WindowManagerPolicyConstants.NAV_BAR_MODE_GESTURAL;

 import android.accessibilityservice.AccessibilityServiceInfo;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.res.Resources;
 import android.os.Build;
 import android.provider.Settings;
 import android.text.TextUtils;
 import android.util.TypedValue;
 import android.view.accessibility.AccessibilityManager;

 import androidx.annotation.IntDef;
 import androidx.annotation.NonNull;
 import androidx.annotation.VisibleForTesting;

 import com.android.settings.R;

 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.util.StringJoiner;

 /** Provides utility methods to accessibility settings only. */
 final class AccessibilityUtil {

     private AccessibilityUtil(){}

     /**
      * Annotation for different accessibilityService fragment UI type.
      *
      * {@code VOLUME_SHORTCUT_TOGGLE} for displaying basic accessibility service fragment but
      * only hardware shortcut allowed.
      * {@code INVISIBLE_TOGGLE} for displaying basic accessibility service fragment without
      * switch bar.
      * {@code TOGGLE} for displaying basic accessibility service fragment.
      */
     @Retention(RetentionPolicy.SOURCE)
     @IntDef({
             AccessibilityServiceFragmentType.VOLUME_SHORTCUT_TOGGLE,
             AccessibilityServiceFragmentType.INVISIBLE_TOGGLE,
             AccessibilityServiceFragmentType.TOGGLE,
     })

     public @interface AccessibilityServiceFragmentType {
         int VOLUME_SHORTCUT_TOGGLE = 0;
         int INVISIBLE_TOGGLE = 1;
         int TOGGLE = 2;
     }

     // TODO(b/147021230): Will move common functions and variables to
     //  android/internal/accessibility folder
     private static final char COMPONENT_NAME_SEPARATOR = ':';
     private static final TextUtils.SimpleStringSplitter sStringColonSplitter =
             new TextUtils.SimpleStringSplitter(COMPONENT_NAME_SEPARATOR);

     /**
      * Annotation for different user shortcut type UI type.
      *
      * {@code EMPTY} for displaying default value.
      * {@code SOFTWARE} for displaying specifying the accessibility services or features which
      * choose accessibility button in the navigation bar as preferred shortcut.
      * {@code HARDWARE} for displaying specifying the accessibility services or features which
      * choose accessibility shortcut as preferred shortcut.
      * {@code TRIPLETAP} for displaying specifying magnification to be toggled via quickly
      * tapping screen 3 times as preferred shortcut.
      */
     @Retention(RetentionPolicy.SOURCE)
     @IntDef({
             UserShortcutType.EMPTY,
             UserShortcutType.SOFTWARE,
             UserShortcutType.HARDWARE,
             UserShortcutType.TRIPLETAP,
     })

     /** Denotes the user shortcut type. */
     public @interface UserShortcutType {
         int EMPTY = 0;
         int SOFTWARE = 1; // 1 << 0
         int HARDWARE = 2; // 1 << 1
         int TRIPLETAP = 4; // 1 << 2
     }

     /** Denotes the accessibility enabled status */
     @Retention(RetentionPolicy.SOURCE)
     public @interface State {
         int OFF = 0;
         int ON = 1;
     }

     /**
      * Return On/Off string according to the setting which specifies the integer value 1 or 0. This
      * setting is defined in the secure system settings {@link android.provider.Settings.Secure}.
      */
     static CharSequence getSummary(Context context, String settingsSecureKey) {
         final boolean enabled = Settings.Secure.getInt(context.getContentResolver(),
                 settingsSecureKey, State.OFF) == State.ON;
         final int resId = enabled ? R.string.accessibility_feature_state_on
                 : R.string.accessibility_feature_state_off;
         return context.getResources().getText(resId);
     }

     /**
      * Capitalizes a string by capitalizing the first character and making the remaining characters
      * lower case.
      */
     public static String capitalize(String stringToCapitalize) {
         if (stringToCapitalize == null) {
             return null;
         }

         StringBuilder capitalizedString = new StringBuilder();
         if (stringToCapitalize.length() > 0) {
             capitalizedString.append(stringToCapitalize.substring(0, 1).toUpperCase());
             if (stringToCapitalize.length() > 1) {
                 capitalizedString.append(stringToCapitalize.substring(1).toLowerCase());
             }
         }
         return capitalizedString.toString();
     }

     /** Determines if a gesture navigation bar is being used. */
     public static boolean isGestureNavigateEnabled(Context context) {
         return context.getResources().getInteger(
                 com.android.internal.R.integer.config_navBarInteractionMode)
                 == NAV_BAR_MODE_GESTURAL;
     }

     /** Determines if a touch explore is being used. */
     public static boolean isTouchExploreEnabled(Context context) {
         final AccessibilityManager am = context.getSystemService(AccessibilityManager.class);
         return am.isTouchExplorationEnabled();
     }

     /**
      * Gets the corresponding fragment type of a given accessibility service.
      *
      * @param accessibilityServiceInfo The accessibilityService's info
      * @return int from {@link AccessibilityServiceFragmentType}
      */
     static @AccessibilityServiceFragmentType int getAccessibilityServiceFragmentType(
             AccessibilityServiceInfo accessibilityServiceInfo) {
         final int targetSdk = accessibilityServiceInfo.getResolveInfo()
                 .serviceInfo.applicationInfo.targetSdkVersion;
         final boolean requestA11yButton = (accessibilityServiceInfo.flags
                 & AccessibilityServiceInfo.FLAG_REQUEST_ACCESSIBILITY_BUTTON) != 0;

         if (targetSdk <= Build.VERSION_CODES.Q) {
             return AccessibilityServiceFragmentType.VOLUME_SHORTCUT_TOGGLE;
         }
         return requestA11yButton
                 ? AccessibilityServiceFragmentType.INVISIBLE_TOGGLE
                 : AccessibilityServiceFragmentType.TOGGLE;
     }

     /**
      * Opts in component name into multiple {@code shortcutTypes} colon-separated string in
      * Settings.
      *
      * @param context The current context.
      * @param shortcutTypes  A combination of {@link UserShortcutType}.
      * @param componentName The component name that need to be opted in Settings.
      */
     static void optInAllValuesToSettings(Context context, int shortcutTypes,
             @NonNull ComponentName componentName) {
         if ((shortcutTypes & UserShortcutType.SOFTWARE) == UserShortcutType.SOFTWARE) {
             optInValueToSettings(context, UserShortcutType.SOFTWARE, componentName);
         }
         if (((shortcutTypes & UserShortcutType.HARDWARE) == UserShortcutType.HARDWARE)) {
             optInValueToSettings(context, UserShortcutType.HARDWARE, componentName);
         }
     }

     /**
      * Opts in component name into {@code shortcutType} colon-separated string in Settings.
      *
      * @param context The current context.
      * @param shortcutType The preferred shortcut type user selected.
      * @param componentName The component name that need to be opted in Settings.
      */
     @VisibleForTesting
     static void optInValueToSettings(Context context, @UserShortcutType int shortcutType,
             @NonNull ComponentName componentName) {
         final String targetKey = convertKeyFromSettings(shortcutType);
         final String targetString = Settings.Secure.getString(context.getContentResolver(),
                 targetKey);

         if (hasValueInSettings(context, shortcutType, componentName)) {
             return;
         }

         final StringJoiner joiner = new StringJoiner(String.valueOf(COMPONENT_NAME_SEPARATOR));
         if (!TextUtils.isEmpty(targetString)) {
             joiner.add(targetString);
         }
         joiner.add(componentName.flattenToString());

         Settings.Secure.putString(context.getContentResolver(), targetKey, joiner.toString());
     }

     /**
      * Opts out component name into multiple {@code shortcutTypes} colon-separated string in
      * Settings.
      *
      * @param context The current context.
      * @param shortcutTypes A combination of {@link UserShortcutType}.
      * @param componentName The component name that need to be opted out from Settings.
      */
     static void optOutAllValuesFromSettings(Context context, int shortcutTypes,
             @NonNull ComponentName componentName) {
         if ((shortcutTypes & UserShortcutType.SOFTWARE) == UserShortcutType.SOFTWARE) {
             optOutValueFromSettings(context, UserShortcutType.SOFTWARE, componentName);
         }
         if (((shortcutTypes & UserShortcutType.HARDWARE) == UserShortcutType.HARDWARE)) {
             optOutValueFromSettings(context, UserShortcutType.HARDWARE, componentName);
         }
     }

     /**
      * Opts out component name into {@code shortcutType} colon-separated string in Settings.
      *
      * @param context The current context.
      * @param shortcutType The preferred shortcut type user selected.
      * @param componentName The component name that need to be opted out from Settings.
      */
     @VisibleForTesting
     static void optOutValueFromSettings(Context context, @UserShortcutType int shortcutType,
             @NonNull ComponentName componentName) {
         final StringJoiner joiner = new StringJoiner(String.valueOf(COMPONENT_NAME_SEPARATOR));
         final String targetKey = convertKeyFromSettings(shortcutType);
         final String targetString = Settings.Secure.getString(context.getContentResolver(),
                 targetKey);

         if (TextUtils.isEmpty(targetString)) {
             return;
         }

         sStringColonSplitter.setString(targetString);
         while (sStringColonSplitter.hasNext()) {
             final String name = sStringColonSplitter.next();
             if (TextUtils.isEmpty(name) || (componentName.flattenToString()).equals(name)) {
                 continue;
             }
             joiner.add(name);
         }

         Settings.Secure.putString(context.getContentResolver(), targetKey, joiner.toString());
     }

     /**
      * Returns if component name existed in one of {@code shortcutTypes} string in Settings.
      *
      * @param context The current context.
      * @param shortcutTypes A combination of {@link UserShortcutType}.
      * @param componentName The component name that need to be checked existed in Settings.
      * @return {@code true} if componentName existed in Settings.
      */
     static boolean hasValuesInSettings(Context context, int shortcutTypes,
             @NonNull ComponentName componentName) {
         boolean exist = false;
         if ((shortcutTypes & UserShortcutType.SOFTWARE) == UserShortcutType.SOFTWARE) {
             exist = hasValueInSettings(context, UserShortcutType.SOFTWARE, componentName);
         }
         if (((shortcutTypes & UserShortcutType.HARDWARE) == UserShortcutType.HARDWARE)) {
             exist |= hasValueInSettings(context, UserShortcutType.HARDWARE, componentName);
         }
         return exist;
     }

     /**
      * Returns if component name existed in {@code shortcutType} string Settings.
      *
      * @param context The current context.
      * @param shortcutType The preferred shortcut type user selected.
      * @param componentName The component name that need to be checked existed in Settings.
      * @return {@code true} if componentName existed in Settings.
      */
     @VisibleForTesting
     static boolean hasValueInSettings(Context context, @UserShortcutType int shortcutType,
             @NonNull ComponentName componentName) {
         final String targetKey = convertKeyFromSettings(shortcutType);
         final String targetString = Settings.Secure.getString(context.getContentResolver(),
                 targetKey);

         if (TextUtils.isEmpty(targetString)) {
             return false;
         }

         sStringColonSplitter.setString(targetString);

         while (sStringColonSplitter.hasNext()) {
             final String name = sStringColonSplitter.next();
             if ((componentName.flattenToString()).equals(name)) {
                 return true;
             }
         }
         return false;
     }

     /**
      * Gets the corresponding user shortcut type of a given accessibility service.
      *
      * @param context The current context.
      * @param componentName The component name that need to be checked existed in Settings.
      * @return The user shortcut type if component name existed in {@code UserShortcutType} string
      * Settings.
      */
     static int getUserShortcutTypesFromSettings(Context context,
             @NonNull ComponentName componentName) {
         int shortcutTypes = UserShortcutType.EMPTY;
         if (hasValuesInSettings(context, UserShortcutType.SOFTWARE, componentName)) {
             shortcutTypes |= UserShortcutType.SOFTWARE;
         }
         if (hasValuesInSettings(context, UserShortcutType.HARDWARE, componentName)) {
             shortcutTypes |= UserShortcutType.HARDWARE;
         }
         return shortcutTypes;
     }

     /**
      * Converts {@link UserShortcutType} to key in Settings.
      *
      * @param shortcutType The shortcut type.
      * @return Mapping key in Settings.
      */
     static String convertKeyFromSettings(@UserShortcutType int shortcutType) {
         switch (shortcutType) {
             case UserShortcutType.SOFTWARE:
                 return Settings.Secure.ACCESSIBILITY_BUTTON_TARGETS;
             case UserShortcutType.HARDWARE:
                 return Settings.Secure.ACCESSIBILITY_SHORTCUT_TARGET_SERVICE;
             case UserShortcutType.TRIPLETAP:
                 return Settings.Secure.ACCESSIBILITY_DISPLAY_MAGNIFICATION_ENABLED;
             default:
                 throw new IllegalArgumentException(
                         "Unsupported userShortcutType " + shortcutType);
         }
     }

     /**
      * Gets the width of the screen.
      *
      * @param context the current context.
      * @return the width of the screen in terms of pixels.
      */
     public static int getScreenWidthPixels(Context context) {
         final Resources resources = context.getResources();
         final int screenWidthDp = resources.getConfiguration().screenWidthDp;

         return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, screenWidthDp,
                 resources.getDisplayMetrics()));
     }

     /**
      * Gets the height of the screen.
      *
      * @param context the current context.
      * @return the height of the screen in terms of pixels.
      */
     public static int getScreenHeightPixels(Context context) {
         final Resources resources = context.getResources();
         final int screenHeightDp = resources.getConfiguration().screenHeightDp;

         return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, screenHeightDp,
                 resources.getDisplayMetrics()));
     }
 }
	/*
	* Copyright (C) 2019 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 android.view.WindowManagerPolicyConstants.NAV_BAR_MODE_GESTURAL;

	import android.accessibilityservice.AccessibilityServiceInfo;
	import android.content.ComponentName;
	import android.content.Context;
	import android.content.res.Resources;
	import android.os.Build;
	import android.provider.Settings;
	import android.text.TextUtils;
	import android.util.TypedValue;
	import android.view.accessibility.AccessibilityManager;

	import androidx.annotation.IntDef;
	import androidx.annotation.NonNull;
	import androidx.annotation.VisibleForTesting;

	import com.android.settings.R;

	import java.lang.annotation.Retention;
	import java.lang.annotation.RetentionPolicy;
	import java.util.StringJoiner;

	/** Provides utility methods to accessibility settings only. */
	final class AccessibilityUtil {

	private AccessibilityUtil(){}

	/**
	* Annotation for different accessibilityService fragment UI type.
	*
	* {@code VOLUME_SHORTCUT_TOGGLE} for displaying basic accessibility service fragment but
	* only hardware shortcut allowed.
	* {@code INVISIBLE_TOGGLE} for displaying basic accessibility service fragment without
	* switch bar.
	* {@code TOGGLE} for displaying basic accessibility service fragment.
	*/
	@Retention(RetentionPolicy.SOURCE)
	@IntDef({
	AccessibilityServiceFragmentType.VOLUME_SHORTCUT_TOGGLE,
	AccessibilityServiceFragmentType.INVISIBLE_TOGGLE,
	AccessibilityServiceFragmentType.TOGGLE,
	})

	public @interface AccessibilityServiceFragmentType {
	int VOLUME_SHORTCUT_TOGGLE = 0;
	int INVISIBLE_TOGGLE = 1;
	int TOGGLE = 2;
	}

	// TODO(b/147021230): Will move common functions and variables to
	// android/internal/accessibility folder
	private static final char COMPONENT_NAME_SEPARATOR = ':';
	private static final TextUtils.SimpleStringSplitter sStringColonSplitter =
	new TextUtils.SimpleStringSplitter(COMPONENT_NAME_SEPARATOR);

	/**
	* Annotation for different user shortcut type UI type.
	*
	* {@code EMPTY} for displaying default value.
	* {@code SOFTWARE} for displaying specifying the accessibility services or features which
	* choose accessibility button in the navigation bar as preferred shortcut.
	* {@code HARDWARE} for displaying specifying the accessibility services or features which
	* choose accessibility shortcut as preferred shortcut.
	* {@code TRIPLETAP} for displaying specifying magnification to be toggled via quickly
	* tapping screen 3 times as preferred shortcut.
	*/
	@Retention(RetentionPolicy.SOURCE)
	@IntDef({
	UserShortcutType.EMPTY,
	UserShortcutType.SOFTWARE,
	UserShortcutType.HARDWARE,
	UserShortcutType.TRIPLETAP,
	})

	/** Denotes the user shortcut type. */
	public @interface UserShortcutType {
	int EMPTY = 0;
	int SOFTWARE = 1; // 1 << 0
	int HARDWARE = 2; // 1 << 1
	int TRIPLETAP = 4; // 1 << 2
	}

	/** Denotes the accessibility enabled status */
	@Retention(RetentionPolicy.SOURCE)
	public @interface State {
	int OFF = 0;
	int ON = 1;
	}

	/**
	* Return On/Off string according to the setting which specifies the integer value 1 or 0. This
	* setting is defined in the secure system settings {@link android.provider.Settings.Secure}.
	*/
	static CharSequence getSummary(Context context, String settingsSecureKey) {
	final boolean enabled = Settings.Secure.getInt(context.getContentResolver(),
	settingsSecureKey, State.OFF) == State.ON;
	final int resId = enabled ? R.string.accessibility_feature_state_on
	: R.string.accessibility_feature_state_off;
	return context.getResources().getText(resId);
	}

	/**
	* Capitalizes a string by capitalizing the first character and making the remaining characters
	* lower case.
	*/
	public static String capitalize(String stringToCapitalize) {
	if (stringToCapitalize == null) {
	return null;
	}

	StringBuilder capitalizedString = new StringBuilder();
	if (stringToCapitalize.length() > 0) {
	capitalizedString.append(stringToCapitalize.substring(0, 1).toUpperCase());
	if (stringToCapitalize.length() > 1) {
	capitalizedString.append(stringToCapitalize.substring(1).toLowerCase());
	}
	}
	return capitalizedString.toString();
	}

	/** Determines if a gesture navigation bar is being used. */
	public static boolean isGestureNavigateEnabled(Context context) {
	return context.getResources().getInteger(
	com.android.internal.R.integer.config_navBarInteractionMode)
	== NAV_BAR_MODE_GESTURAL;
	}

	/** Determines if a touch explore is being used. */
	public static boolean isTouchExploreEnabled(Context context) {
	final AccessibilityManager am = context.getSystemService(AccessibilityManager.class);
	return am.isTouchExplorationEnabled();
	}

	/**
	* Gets the corresponding fragment type of a given accessibility service.
	*
	* @param accessibilityServiceInfo The accessibilityService's info
	* @return int from {@link AccessibilityServiceFragmentType}
	*/
	static @AccessibilityServiceFragmentType int getAccessibilityServiceFragmentType(
	AccessibilityServiceInfo accessibilityServiceInfo) {
	final int targetSdk = accessibilityServiceInfo.getResolveInfo()
	.serviceInfo.applicationInfo.targetSdkVersion;
	final boolean requestA11yButton = (accessibilityServiceInfo.flags
	& AccessibilityServiceInfo.FLAG_REQUEST_ACCESSIBILITY_BUTTON) != 0;

	if (targetSdk <= Build.VERSION_CODES.Q) {
	return AccessibilityServiceFragmentType.VOLUME_SHORTCUT_TOGGLE;
	}
	return requestA11yButton
	? AccessibilityServiceFragmentType.INVISIBLE_TOGGLE
	: AccessibilityServiceFragmentType.TOGGLE;
	}

	/**
	* Opts in component name into multiple {@code shortcutTypes} colon-separated string in
	* Settings.
	*
	* @param context The current context.
	* @param shortcutTypes A combination of {@link UserShortcutType}.
	* @param componentName The component name that need to be opted in Settings.
	*/
	static void optInAllValuesToSettings(Context context, int shortcutTypes,
	@NonNull ComponentName componentName) {
	if ((shortcutTypes & UserShortcutType.SOFTWARE) == UserShortcutType.SOFTWARE) {
	optInValueToSettings(context, UserShortcutType.SOFTWARE, componentName);
	}
	if (((shortcutTypes & UserShortcutType.HARDWARE) == UserShortcutType.HARDWARE)) {
	optInValueToSettings(context, UserShortcutType.HARDWARE, componentName);
	}
	}

	/**
	* Opts in component name into {@code shortcutType} colon-separated string in Settings.
	*
	* @param context The current context.
	* @param shortcutType The preferred shortcut type user selected.
	* @param componentName The component name that need to be opted in Settings.
	*/
	@VisibleForTesting
	static void optInValueToSettings(Context context, @UserShortcutType int shortcutType,
	@NonNull ComponentName componentName) {
	final String targetKey = convertKeyFromSettings(shortcutType);
	final String targetString = Settings.Secure.getString(context.getContentResolver(),
	targetKey);

	if (hasValueInSettings(context, shortcutType, componentName)) {
	return;
	}

	final StringJoiner joiner = new StringJoiner(String.valueOf(COMPONENT_NAME_SEPARATOR));
	if (!TextUtils.isEmpty(targetString)) {
	joiner.add(targetString);
	}
	joiner.add(componentName.flattenToString());

	Settings.Secure.putString(context.getContentResolver(), targetKey, joiner.toString());
	}

	/**
	* Opts out component name into multiple {@code shortcutTypes} colon-separated string in
	* Settings.
	*
	* @param context The current context.
	* @param shortcutTypes A combination of {@link UserShortcutType}.
	* @param componentName The component name that need to be opted out from Settings.
	*/
	static void optOutAllValuesFromSettings(Context context, int shortcutTypes,
	@NonNull ComponentName componentName) {
	if ((shortcutTypes & UserShortcutType.SOFTWARE) == UserShortcutType.SOFTWARE) {
	optOutValueFromSettings(context, UserShortcutType.SOFTWARE, componentName);
	}
	if (((shortcutTypes & UserShortcutType.HARDWARE) == UserShortcutType.HARDWARE)) {
	optOutValueFromSettings(context, UserShortcutType.HARDWARE, componentName);
	}
	}

	/**
	* Opts out component name into {@code shortcutType} colon-separated string in Settings.
	*
	* @param context The current context.
	* @param shortcutType The preferred shortcut type user selected.
	* @param componentName The component name that need to be opted out from Settings.
	*/
	@VisibleForTesting
	static void optOutValueFromSettings(Context context, @UserShortcutType int shortcutType,
	@NonNull ComponentName componentName) {
	final StringJoiner joiner = new StringJoiner(String.valueOf(COMPONENT_NAME_SEPARATOR));
	final String targetKey = convertKeyFromSettings(shortcutType);
	final String targetString = Settings.Secure.getString(context.getContentResolver(),
	targetKey);

	if (TextUtils.isEmpty(targetString)) {
	return;
	}

	sStringColonSplitter.setString(targetString);
	while (sStringColonSplitter.hasNext()) {
	final String name = sStringColonSplitter.next();
	if (TextUtils.isEmpty(name) \|\| (componentName.flattenToString()).equals(name)) {
	continue;
	}
	joiner.add(name);
	}

	Settings.Secure.putString(context.getContentResolver(), targetKey, joiner.toString());
	}

	/**
	* Returns if component name existed in one of {@code shortcutTypes} string in Settings.
	*
	* @param context The current context.
	* @param shortcutTypes A combination of {@link UserShortcutType}.
	* @param componentName The component name that need to be checked existed in Settings.
	* @return {@code true} if componentName existed in Settings.
	*/
	static boolean hasValuesInSettings(Context context, int shortcutTypes,
	@NonNull ComponentName componentName) {
	boolean exist = false;
	if ((shortcutTypes & UserShortcutType.SOFTWARE) == UserShortcutType.SOFTWARE) {
	exist = hasValueInSettings(context, UserShortcutType.SOFTWARE, componentName);
	}
	if (((shortcutTypes & UserShortcutType.HARDWARE) == UserShortcutType.HARDWARE)) {
	exist \|= hasValueInSettings(context, UserShortcutType.HARDWARE, componentName);
	}
	return exist;
	}

	/**
	* Returns if component name existed in {@code shortcutType} string Settings.
	*
	* @param context The current context.
	* @param shortcutType The preferred shortcut type user selected.
	* @param componentName The component name that need to be checked existed in Settings.
	* @return {@code true} if componentName existed in Settings.
	*/
	@VisibleForTesting
	static boolean hasValueInSettings(Context context, @UserShortcutType int shortcutType,
	@NonNull ComponentName componentName) {
	final String targetKey = convertKeyFromSettings(shortcutType);
	final String targetString = Settings.Secure.getString(context.getContentResolver(),
	targetKey);

	if (TextUtils.isEmpty(targetString)) {
	return false;
	}

	sStringColonSplitter.setString(targetString);

	while (sStringColonSplitter.hasNext()) {
	final String name = sStringColonSplitter.next();
	if ((componentName.flattenToString()).equals(name)) {
	return true;
	}
	}
	return false;
	}

	/**
	* Gets the corresponding user shortcut type of a given accessibility service.
	*
	* @param context The current context.
	* @param componentName The component name that need to be checked existed in Settings.
	* @return The user shortcut type if component name existed in {@code UserShortcutType} string
	* Settings.
	*/
	static int getUserShortcutTypesFromSettings(Context context,
	@NonNull ComponentName componentName) {
	int shortcutTypes = UserShortcutType.EMPTY;
	if (hasValuesInSettings(context, UserShortcutType.SOFTWARE, componentName)) {
	shortcutTypes \|= UserShortcutType.SOFTWARE;
	}
	if (hasValuesInSettings(context, UserShortcutType.HARDWARE, componentName)) {
	shortcutTypes \|= UserShortcutType.HARDWARE;
	}
	return shortcutTypes;
	}

	/**
	* Converts {@link UserShortcutType} to key in Settings.
	*
	* @param shortcutType The shortcut type.
	* @return Mapping key in Settings.
	*/
	static String convertKeyFromSettings(@UserShortcutType int shortcutType) {
	switch (shortcutType) {
	case UserShortcutType.SOFTWARE:
	return Settings.Secure.ACCESSIBILITY_BUTTON_TARGETS;
	case UserShortcutType.HARDWARE:
	return Settings.Secure.ACCESSIBILITY_SHORTCUT_TARGET_SERVICE;
	case UserShortcutType.TRIPLETAP:
	return Settings.Secure.ACCESSIBILITY_DISPLAY_MAGNIFICATION_ENABLED;
	default:
	throw new IllegalArgumentException(
	"Unsupported userShortcutType " + shortcutType);
	}
	}

	/**
	* Gets the width of the screen.
	*
	* @param context the current context.
	* @return the width of the screen in terms of pixels.
	*/
	public static int getScreenWidthPixels(Context context) {
	final Resources resources = context.getResources();
	final int screenWidthDp = resources.getConfiguration().screenWidthDp;

	return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, screenWidthDp,
	resources.getDisplayMetrics()));
	}

	/**
	* Gets the height of the screen.
	*
	* @param context the current context.
	* @return the height of the screen in terms of pixels.
	*/
	public static int getScreenHeightPixels(Context context) {
	final Resources resources = context.getResources();
	final int screenHeightDp = resources.getConfiguration().screenHeightDp;

	return Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, screenHeightDp,
	resources.getDisplayMetrics()));
	}
	}