Provides TC ID for accessibility framework feature for "about" and "learn more" part

Goal: Improve readability which is a bit difficult because of string concatenation for accurate translation.
Root cause: In some locales, framework features name would be a word rather than a product name. Hence it need to be in the different position in a sentence.
Solution: Use whole sentence to translate instead of concatenating the string could solve this issue.

Bug: 185478543
Test: make RunSettingsRoboTests ROBOTEST_FILTER=AccessibilityFooterPreferenceControllerTest
Change-Id: Id198805329be9c773df87f38a074ae956e4d0cdb

res/values/strings.xml

@@ -5256,10 +5256,18 @@
     <string name="select_to_speak_summary">Tap items on your screen to hear them read aloud</string>
     <!-- Title for the accessibility preference screen to enable video captioning. [CHAR LIMIT=35] -->
     <string name="accessibility_captioning_title">Caption preferences</string>
+    <!-- Title for accessibility captioning footer. [CHAR LIMIT=60] -->
+    <string name="accessibility_captioning_about_title">About caption preferences</string>
+    <!-- Accessibility captioning footer link content description [CHAR LIMIT=NONE] -->
+    <string name="accessibility_captioning_footer_learn_more_content_description">Learn more about caption preferences</string>
     <!-- Title for the accessibility preference screen to enable screen magnification. [CHAR LIMIT=35] -->
     <string name="accessibility_screen_magnification_title">Magnification</string>
     <!-- Title for accessibility shortcut preference for magnification. [CHAR LIMIT=60] -->
     <string name="accessibility_screen_magnification_shortcut_title">Magnification shortcut</string>
+    <!-- Title for screen magnification footer. [CHAR LIMIT=60] -->
+    <string name="accessibility_screen_magnification_about_title">About magnification</string>
+    <!-- Screen magnification footer link content description [CHAR LIMIT=NONE] -->
+    <string name="accessibility_screen_magnification_footer_learn_more_content_description">Learn more about magnification</string>
     <!-- Title for the accessibility preference screen to edit magnification area. [CHAR LIMIT=35] -->
     <string name="accessibility_magnification_mode_title">Magnification type</string>
     <!-- Message for the accessibility preference screen to edit magnification area dialog. [CHAR LIMIT=none] -->
@@ -5410,6 +5418,12 @@
     <string name="accessibility_button_title">Accessibility button</string>
     <!-- Title for the accessibility button & gesture page. [CHAR LIMIT=35] -->
     <string name="accessibility_button_gesture_title">Accessibility button &amp; gesture</string>
+    <!-- Title for the accessibility button footer. [CHAR LIMIT=35] -->
+    <string name="accessibility_button_about_title">About accessibility button</string>
+    <!-- Title for the accessibility button & gesture footer. [CHAR LIMIT=55] -->
+    <string name="accessibility_button_gesture_about_title">About accessibility button &amp; gesture</string>
+    <!-- Accessibility button & gestures footer link content description [CHAR LIMIT=NONE] -->
+    <string name="accessibility_button_gesture_footer_learn_more_content_description">Learn more about accessibility button &amp; gesture</string>
     <!-- Intro for the accessibility button page. [CHAR LIMIT=100] -->
     <string name="accessibility_button_intro">Using the accessibility button. The gesture isn\u2019t available with 3-button navigation.</string>
     <!-- Summary text for the accessibility button preference. [CHAR LIMIT=50] -->
@@ -5471,6 +5485,10 @@
     <string name="accessibility_timeout_2mins">2 minutes</string>
     <!-- Title for accessibility settings timeout item. [CHAR LIMIT=43] -->
     <string name="accessibility_setting_item_control_timeout_title">Time to take action (Accessibility timeout)</string>
+    <!-- Title for accessibility timeout footer. [CHAR LIMIT=65] -->
+    <string name="accessibility_control_timeout_about_title">About time to take action (Accessibility timeout)</string>
+    <!-- Accessibility timeout footer link content description [CHAR LIMIT=NONE] -->
+    <string name="accessibility_control_timeout_footer_learn_more_content_description">Learn more about time to take action (Accessibility timeout)</string>
     <!-- Title for accessibility preference to accessibility timeout. [CHAR LIMIT=35] -->
     <string name="accessibility_control_timeout_preference_title">Time to take action</string>
     <!-- Descriptive text for accessibility preference to accessibility control timeout. [CHAR LIMIT=NONE] -->
@@ -5497,6 +5515,10 @@
     </string>
     <!-- Title for accessibility preference for configuring feature that performs click action soon after mouse/trackpad pointer stops moving. [CHAR LIMIT=NONE] -->
     <string name="accessibility_autoclick_preference_title">Autoclick (dwell timing)</string>
+    <!-- Title for accessibility dwell timing footer. [CHAR LIMIT=35] -->
+    <string name="accessibility_autoclick_about_title">About autoclick (dwell timing)</string>
+    <!-- Accessibility dwell timing footer link content description [CHAR LIMIT=NONE] -->
+    <string name="accessibility_autoclick_footer_learn_more_content_description">Learn more about autoclick (dwell timing)</string>
     <!-- Footer text to explain what autoclick does -->
     <string name="accessibility_autoclick_description">Autoclick works with a connected mouse. You can set the mouse cursor to click automatically when the cursor stops moving for a certain amount of time.</string>
     <!-- Option heading to leave the auto click requirement for accessibility users at its default level. [CHAR LIMIT=50] -->
@@ -5537,6 +5559,14 @@
     <string name="accessibility_daltonizer_primary_switch_title">Use color correction</string>
     <!-- Title for accessibility shortcut preference for color correction. [CHAR LIMIT=60] -->
     <string name="accessibility_daltonizer_shortcut_title">Color correction shortcut</string>
+    <!-- Title for Color correction footer. [CHAR LIMIT=35] -->
+    <string name="accessibility_daltonizer_about_title">About color correction</string>
+    <!-- Color inversion footer link content description [CHAR LIMIT=NONE] -->
+    <string name="accessibility_daltonizer_footer_learn_more_content_description">Learn more about color correction</string>
+    <!-- Title for Color inversion footer. [CHAR LIMIT=35] -->
+    <string name="accessibility_color_inversion_about_title">About color inversion</string>
+    <!-- Color correction footer link content description [CHAR LIMIT=NONE] -->
+    <string name="accessibility_color_inversion_footer_learn_more_content_description">Learn more about color inversion</string>
     <!-- Title for Captions settings screen to control turning on/off the feature entirely [CHAR LIMIT=60] -->
     <string name="accessibility_caption_primary_switch_title">Show captions</string>
     <!-- Summary for Captions settings screen to control turning on/off the feature entirely [CHAR LIMIT=NONE] -->
@@ -5618,6 +5648,8 @@
     <string name="reduce_bright_colors_switch_title">Make screen extra dim</string>
     <!-- Title for accessibility shortcut preference for Reduce Brightness. [CHAR LIMIT=60] -->
     <string name="reduce_bright_colors_shortcut_title">Extra dim shortcut</string>
+    <!-- Title for Reduce Brightness feature footer. [CHAR LIMIT=35] -->
+    <string name="reduce_bright_colors_about_title">About extra dim</string>
     <!-- Summary for the accessibility preference to configure Reduce Brightness feature. [CHAR LIMIT=NONE] -->
     <string name="reduce_bright_colors_preference_summary" product="default">Dim screen beyond your phone\u2019s minimum brightness</string>
     <!-- Summary for the accessibility preference to configure Reduce Brightness feature. [CHAR LIMIT=NONE] -->

src/com/android/settings/accessibility/AccessibilityButtonFooterPreferenceController.java

@@ -33,8 +33,14 @@ public class AccessibilityButtonFooterPreferenceController extends
     }
 
     @Override
-    protected String getLabelName() {
+    protected String getLearnMoreContentDescription() {
-        return mContext.getString(R.string.accessibility_button_title);
+        return mContext.getString(
+            R.string.accessibility_button_gesture_footer_learn_more_content_description);
+    }
+
+    @Override
+    protected String getIntroductionTitle() {
+        return mContext.getString(R.string.accessibility_button_about_title);
     }
 
     @Override

src/com/android/settings/accessibility/AccessibilityControlTimeoutFooterPreferenceController.java

@@ -31,8 +31,14 @@ public class AccessibilityControlTimeoutFooterPreferenceController extends
     }
 
     @Override
-    protected String getLabelName() {
+    protected String getLearnMoreContentDescription() {
-        return mContext.getString(R.string.accessibility_setting_item_control_timeout_title);
+        return mContext.getString(
+            R.string.accessibility_control_timeout_footer_learn_more_content_description);
+    }
+
+    @Override
+    protected String getIntroductionTitle() {
+        return mContext.getString(R.string.accessibility_control_timeout_about_title);
     }
 
     @Override

src/com/android/settings/accessibility/AccessibilityFooterPreferenceController.java

@@ -21,14 +21,18 @@ import android.content.Intent;
 
 import androidx.preference.PreferenceScreen;
 
-import com.android.settings.R;
 import com.android.settings.core.BasePreferenceController;
 import com.android.settingslib.HelpUtils;
 
 /**
- * Base class for accessibility preference footer.
+ * Preference controller that controls the help link and customizes the preference title in {@link
+ * AccessibilityFooterPreference}.
  */
-public abstract class AccessibilityFooterPreferenceController extends BasePreferenceController {
+public class AccessibilityFooterPreferenceController extends BasePreferenceController {
+
+    private int mHelpResource;
+    private String mLearnMoreContentDescription;
+    private String mIntroductionTitle;
 
     public AccessibilityFooterPreferenceController(Context context, String key) {
         super(context, key);
@@ -49,23 +53,55 @@ public abstract class AccessibilityFooterPreferenceController extends BasePrefer
     }
 
     /**
-     * Override this if showing a help item in the footer bar, by returning the resource id.
+     * Setups a help item in the {@link AccessibilityFooterPreference} with specific content
+     * description.
+     */
+    public void setupHelpLink(int helpResource, String learnMoreContentDescription) {
+        mHelpResource = helpResource;
+        mLearnMoreContentDescription = learnMoreContentDescription;
+    }
+
+    /**
+     * Overrides this if showing a help item in the {@link AccessibilityFooterPreference}, by
+     * returning the resource id.
      *
      * @return the resource id for the help url
      */
     protected int getHelpResource() {
-        return 0;
+        return mHelpResource;
     }
 
-    /** Returns the accessibility feature name. */
+    /**
-    protected abstract String getLabelName();
+     * Overrides this if showing a help item in the {@link AccessibilityFooterPreference} with
+     * specific content description.
+     *
+     * @return the content description for the help url
+     */
+    protected String getLearnMoreContentDescription() {
+        return mLearnMoreContentDescription;
+    }
+
+    /**
+     * Sets the announcement the specific features introduction in the {@link
+     * AccessibilityFooterPreference}.
+     */
+    public void setIntroductionTitle(String introductionTitle) {
+        mIntroductionTitle = introductionTitle;
+    }
+
+    /**
+     * Overrides this if announcement the specific features introduction in the {@link
+     * AccessibilityFooterPreference}.
+     *
+     * @return the extended content description for specific features introduction
+     */
+    protected String getIntroductionTitle() {
+        return mIntroductionTitle;
+    }
 
     private void updateFooterPreferences(AccessibilityFooterPreference footerPreference) {
         final StringBuffer sb = new StringBuffer();
-        sb.append(mContext.getString(
+        sb.append(getIntroductionTitle()).append("\n\n").append(footerPreference.getTitle());
-                R.string.accessibility_introduction_title, getLabelName()))
-                .append("\n\n")
-                .append(footerPreference.getTitle());
         footerPreference.setContentDescription(sb);
 
         if (getHelpResource() != 0) {
@@ -75,10 +111,10 @@ public abstract class AccessibilityFooterPreferenceController extends BasePrefer
                         mContext.getClass().getName());
                 view.startActivityForResult(helpIntent, 0);
             });
-
+            footerPreference.setLearnMoreContentDescription(getLearnMoreContentDescription());
-            final String learnMoreContentDescription = mContext.getString(
+            footerPreference.setLinkEnabled(true);
-                    R.string.footer_learn_more_content_description, getLabelName());
+        } else {
-            footerPreference.setLearnMoreContentDescription(learnMoreContentDescription);
+            footerPreference.setLinkEnabled(false);
         }
     }
 }

src/com/android/settings/accessibility/CaptionFooterPreferenceController.java

@@ -30,12 +30,18 @@ public class CaptionFooterPreferenceController extends AccessibilityFooterPrefer
     }
 
     @Override
-    protected String getLabelName() {
+    protected String getLearnMoreContentDescription() {
-        return mContext.getString(R.string.accessibility_captioning_title);
+        return mContext.getString(
+            R.string.accessibility_captioning_footer_learn_more_content_description);
     }
 
     @Override
-    protected int getHelpResource()  {
+    protected String getIntroductionTitle() {
+        return mContext.getString(R.string.accessibility_captioning_about_title);
+    }
+
+    @Override
+    protected int getHelpResource() {
         return R.string.help_url_caption;
     }
 }

src/com/android/settings/accessibility/ToggleAutoclickFooterPreferenceController.java

@@ -31,8 +31,14 @@ public class ToggleAutoclickFooterPreferenceController extends
     }
 
     @Override
-    protected String getLabelName() {
+    protected String getLearnMoreContentDescription() {
-        return mContext.getString(R.string.accessibility_autoclick_preference_title);
+        return mContext.getString(
+            R.string.accessibility_autoclick_footer_learn_more_content_description);
+    }
+
+    @Override
+    protected String getIntroductionTitle() {
+        return mContext.getString(R.string.accessibility_autoclick_about_title);
     }
 
     @Override

src/com/android/settings/accessibility/ToggleColorInversionPreferenceFragment.java

@@ -38,8 +38,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 /** Settings page for color inversion. */
-public class ToggleColorInversionPreferenceFragment extends
+public class ToggleColorInversionPreferenceFragment extends ToggleFeaturePreferenceFragment {
-        ToggleFeaturePreferenceFragment {
 
     private static final String ENABLED = Settings.Secure.ACCESSIBILITY_DISPLAY_INVERSION_ENABLED;
     private final Handler mHandler = new Handler();
@@ -95,7 +94,20 @@ public class ToggleColorInversionPreferenceFragment extends
                 updateSwitchBarToggleSwitch();
             }
         };
-        return super.onCreateView(inflater, container, savedInstanceState);
+
+        final View view = super.onCreateView(inflater, container, savedInstanceState);
+        updateFooterPreference();
+        return view;
+    }
+
+    private void updateFooterPreference() {
+        final String title = getPrefContext().getString(
+                R.string.accessibility_color_inversion_about_title);
+        final String learnMoreContentDescription = getPrefContext().getString(
+                R.string.accessibility_color_inversion_footer_learn_more_content_description);
+        mFooterPreferenceController.setIntroductionTitle(title);
+        mFooterPreferenceController.setupHelpLink(getHelpResource(), learnMoreContentDescription);
+        mFooterPreferenceController.displayPreference(getPreferenceScreen());
     }
 
     @Override

src/com/android/settings/accessibility/ToggleDaltonizerPreferenceFragment.java

@@ -92,12 +92,20 @@ public final class ToggleDaltonizerPreferenceFragment extends ToggleFeaturePrefe
                 updateSwitchBarToggleSwitch();
             }
         };
-        return super.onCreateView(inflater, container, savedInstanceState);
+
+        final View view = super.onCreateView(inflater, container, savedInstanceState);
+        updateFooterPreference();
+        return view;
     }
 
-    @Override
+    private void updateFooterPreference() {
-    public void onViewCreated(View view, Bundle savedInstanceState) {
+        final String title = getPrefContext()
-        super.onViewCreated(view, savedInstanceState);
+                .getString(R.string.accessibility_daltonizer_about_title);
+        final String learnMoreContentDescription = getPrefContext()
+                .getString(R.string.accessibility_daltonizer_footer_learn_more_content_description);
+        mFooterPreferenceController.setIntroductionTitle(title);
+        mFooterPreferenceController.setupHelpLink(getHelpResource(), learnMoreContentDescription);
+        mFooterPreferenceController.displayPreference(getPreferenceScreen());
     }
 
     /** Customizes the order by preference key. */

src/com/android/settings/accessibility/ToggleFeaturePreferenceFragment.java

@@ -57,7 +57,6 @@ import com.android.settings.accessibility.AccessibilityUtil.UserShortcutType;
 import com.android.settings.utils.LocaleUtils;
 import com.android.settings.widget.SettingsMainSwitchBar;
 import com.android.settings.widget.SettingsMainSwitchPreference;
-import com.android.settingslib.HelpUtils;
 import com.android.settingslib.accessibility.AccessibilityUtils;
 import com.android.settingslib.widget.IllustrationPreference;
 import com.android.settingslib.widget.OnMainSwitchChangeListener;
@@ -78,6 +77,7 @@ public abstract class ToggleFeaturePreferenceFragment extends SettingsPreference
     protected SettingsMainSwitchPreference mToggleServiceSwitchPreference;
     protected ShortcutPreference mShortcutPreference;
     protected Preference mSettingsPreference;
+    protected AccessibilityFooterPreferenceController mFooterPreferenceController;
     protected String mPreferenceKey;
 
     protected CharSequence mSettingsTitle;
@@ -469,33 +469,19 @@ public abstract class ToggleFeaturePreferenceFragment extends SettingsPreference
         final PreferenceScreen screen = getPreferenceScreen();
         final CharSequence htmlDescription = Html.fromHtml(mHtmlDescription.toString(),
                 Html.FROM_HTML_MODE_COMPACT, mImageGetter, /* tagHandler= */ null);
-        final String iconContentDescription =
-                getString(R.string.accessibility_introduction_title, mPackageName);
 
         final AccessibilityFooterPreference htmlFooterPreference =
                 new AccessibilityFooterPreference(screen.getContext());
         htmlFooterPreference.setKey(KEY_HTML_DESCRIPTION_PREFERENCE);
         htmlFooterPreference.setSummary(htmlDescription);
-        htmlFooterPreference.setContentDescription(
-                generateFooterContentDescription(htmlDescription));
-
-        // Only framework tools support help link
-        if (getHelpResource() != 0) {
-            htmlFooterPreference.setLearnMoreAction(view -> {
-                final Intent helpIntent = HelpUtils.getHelpIntent(
-                        getContext(), getContext().getString(getHelpResource()),
-                        getContext().getClass().getName());
-                view.startActivityForResult(helpIntent, 0);
-            });
-
-            final String learnMoreContentDescription = getPrefContext().getString(
-                    R.string.footer_learn_more_content_description, mPackageName);
-            htmlFooterPreference.setLearnMoreContentDescription(learnMoreContentDescription);
-            htmlFooterPreference.setLinkEnabled(true);
-        } else {
-            htmlFooterPreference.setLinkEnabled(false);
-        }
         screen.addPreference(htmlFooterPreference);
+
+        // TODO(b/171272809): Migrate to DashboardFragment.
+        final String title = getString(R.string.accessibility_introduction_title, mPackageName);
+        mFooterPreferenceController = new AccessibilityFooterPreferenceController(
+            screen.getContext(), htmlFooterPreference.getKey());
+        mFooterPreferenceController.setIntroductionTitle(title);
+        mFooterPreferenceController.displayPreference(screen);
     }
 
     private void initFooterPreference() {
@@ -518,41 +504,22 @@ public abstract class ToggleFeaturePreferenceFragment extends SettingsPreference
      *
      * @param screen The preference screen to add the footer preference
      * @param summary The summary of the preference summary.
-     * @param iconContentDescription The content description of icon in the footer.
+     * @param introductionTitle The title of introduction in the footer.
      */
     @VisibleForTesting
     void createFooterPreference(PreferenceScreen screen, CharSequence summary,
-            String iconContentDescription) {
+            String introductionTitle) {
         final AccessibilityFooterPreference footerPreference =
                 new AccessibilityFooterPreference(screen.getContext());
         footerPreference.setSummary(summary);
-        footerPreference.setContentDescription(
-                generateFooterContentDescription(summary));
-
-        // Only framework tools support help link
-        if (getHelpResource() != 0) {
-            footerPreference.setLearnMoreAction(view -> {
-                final Intent helpIntent = HelpUtils.getHelpIntent(
-                        getContext(), getContext().getString(getHelpResource()),
-                        getContext().getClass().getName());
-                view.startActivityForResult(helpIntent, 0);
-            });
-
-            final String learnMoreContentDescription = getPrefContext().getString(
-                    R.string.footer_learn_more_content_description, mPackageName);
-            footerPreference.setLearnMoreContentDescription(learnMoreContentDescription);
-        }
         screen.addPreference(footerPreference);
+
+        mFooterPreferenceController = new AccessibilityFooterPreferenceController(
+            screen.getContext(), footerPreference.getKey());
+        mFooterPreferenceController.setIntroductionTitle(introductionTitle);
+        mFooterPreferenceController.displayPreference(screen);
     }
 
-    private CharSequence generateFooterContentDescription(CharSequence footerContent) {
-        final StringBuffer sb = new StringBuffer();
-        sb.append(getPrefContext().getString(
-                R.string.accessibility_introduction_title, mPackageName))
-                .append("\n\n")
-                .append(footerContent);
-        return sb;
-    }
     @VisibleForTesting
     void setupEditShortcutDialog(Dialog dialog) {
         final View dialogSoftwareView = dialog.findViewById(R.id.software_shortcut);

src/com/android/settings/accessibility/ToggleReduceBrightColorsPreferenceFragment.java

@@ -86,6 +86,7 @@ public class ToggleReduceBrightColorsPreferenceFragment extends ToggleFeaturePre
         // Parent sets the title when creating the view, so set it after calling super
         mToggleServiceSwitchPreference.setTitle(R.string.reduce_bright_colors_switch_title);
         updateGeneralCategoryOrder();
+        updateFooterPreference();
         return view;
     }
 
@@ -101,6 +102,12 @@ public class ToggleReduceBrightColorsPreferenceFragment extends ToggleFeaturePre
         generalCategory.addPreference(persist);
     }
 
+    private void updateFooterPreference() {
+        final String title = getPrefContext().getString(R.string.reduce_bright_colors_about_title);
+        mFooterPreferenceController.setIntroductionTitle(title);
+        mFooterPreferenceController.displayPreference(getPreferenceScreen());
+    }
+
     @Override
     public void onViewCreated(View view, Bundle savedInstanceState) {
         super.onViewCreated(view, savedInstanceState);
@@ -135,7 +142,6 @@ public class ToggleReduceBrightColorsPreferenceFragment extends ToggleFeaturePre
         return R.xml.reduce_bright_colors_settings;
     }
 
-
     @Override
     protected void onPreferenceToggled(String preferenceKey, boolean enabled) {
         AccessibilityStatsLogUtils.logAccessibilityServiceEnabled(mComponentName, enabled);

src/com/android/settings/accessibility/ToggleScreenMagnificationPreferenceFragment.java

@@ -95,7 +95,20 @@ public class ToggleScreenMagnificationPreferenceFragment extends
             removeDialog(DialogEnums.EDIT_SHORTCUT);
             mShortcutPreference.setSummary(getShortcutTypeSummary(getPrefContext()));
         };
-        return super.onCreateView(inflater, container, savedInstanceState);
+
+        final View view = super.onCreateView(inflater, container, savedInstanceState);
+        updateFooterPreference();
+        return view;
+    }
+
+    private void updateFooterPreference() {
+        final String title = getPrefContext().getString(
+                R.string.accessibility_screen_magnification_about_title);
+        final String learnMoreContentDescription = getPrefContext().getString(
+                R.string.accessibility_screen_magnification_footer_learn_more_content_description);
+        mFooterPreferenceController.setIntroductionTitle(title);
+        mFooterPreferenceController.setupHelpLink(getHelpResource(), learnMoreContentDescription);
+        mFooterPreferenceController.displayPreference(getPreferenceScreen());
     }
 
     @Override

tests/robotests/src/com/android/settings/accessibility/AccessibilityFooterPreferenceControllerTest.java

@@ -0,0 +1,124 @@
+/*
+ * 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.settings.accessibility;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.TextView;
+
+import androidx.preference.PreferenceScreen;
+import androidx.preference.PreferenceViewHolder;
+import androidx.test.core.app.ApplicationProvider;
+
+import com.android.settings.R;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.Spy;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+import org.robolectric.RobolectricTestRunner;
+
+/**
+ * Tests for {@link AccessibilityFooterPreferenceController}.
+ */
+@RunWith(RobolectricTestRunner.class)
+public class AccessibilityFooterPreferenceControllerTest {
+
+    private static final String TEST_KEY = "test_pref_key";
+    private static final String TEST_TITLE = "test_title";
+    private static final String TEST_INTRODUCTION_TITLE = "test_introduction_title";
+    private static final String TEST_CONTENT_DESCRIPTION = "test_content_description";
+    private static final int TEST_HELP_ID = 12345;
+
+    @Rule
+    public final MockitoRule mockito = MockitoJUnit.rule();
+
+    @Spy
+    private final Context mContext = ApplicationProvider.getApplicationContext();
+    @Mock
+    private PreferenceScreen mScreen;
+    private AccessibilityFooterPreferenceController mController;
+    private AccessibilityFooterPreference mPreference;
+    private PreferenceViewHolder mPreferenceViewHolder;
+
+    @Before
+    public void setUp() {
+        mController = new AccessibilityFooterPreferenceController(mContext, TEST_KEY);
+        mPreference = new AccessibilityFooterPreference(mContext);
+        mPreference.setKey(TEST_KEY);
+        mPreference.setTitle(TEST_TITLE);
+
+        final LayoutInflater inflater = LayoutInflater.from(mContext);
+        final View view = inflater.inflate(R.layout.preference_footer, null);
+        mPreferenceViewHolder = PreferenceViewHolder.createInstanceForTests(view);
+        mPreference.onBindViewHolder(mPreferenceViewHolder);
+
+        when(mScreen.findPreference(mController.getPreferenceKey())).thenReturn(mPreference);
+    }
+
+    @Test
+    public void setIntroductionTitle_setCorrectIntroductionTitle() {
+        mController.setIntroductionTitle(TEST_INTRODUCTION_TITLE);
+
+        assertThat(mController.getIntroductionTitle()).isEqualTo(TEST_INTRODUCTION_TITLE);
+    }
+
+    @Test
+    public void onBindViewHolder_setIntroductionTitle_setCorrectIntroductionTitle() {
+        mController.setIntroductionTitle(TEST_INTRODUCTION_TITLE);
+        mController.displayPreference(mScreen);
+
+        mPreference.onBindViewHolder(mPreferenceViewHolder);
+
+        final TextView summaryView = (TextView) mPreferenceViewHolder
+                .findViewById(android.R.id.title);
+        assertThat(summaryView.getContentDescription().toString())
+                .contains(TEST_INTRODUCTION_TITLE);
+    }
+
+    @Test
+    public void setupHelpLink_setCorrectHelpLinkAndContentDescription() {
+        mController.setupHelpLink(TEST_HELP_ID, TEST_CONTENT_DESCRIPTION);
+
+        assertThat(mController.getHelpResource()).isEqualTo(TEST_HELP_ID);
+        assertThat(mController.getLearnMoreContentDescription())
+                .isEqualTo(TEST_CONTENT_DESCRIPTION);
+    }
+
+    @Test
+    public void onBindViewHolder_setupHelpLink_setCorrectHelpLinkAndContentDescription() {
+        mController.setupHelpLink(TEST_HELP_ID, TEST_CONTENT_DESCRIPTION);
+        mController.displayPreference(mScreen);
+
+        mPreference.onBindViewHolder(mPreferenceViewHolder);
+
+        final TextView learnMoreView = (TextView) mPreferenceViewHolder
+                .findViewById(com.android.settingslib.R.id.settingslib_learn_more);
+        assertThat(learnMoreView.getContentDescription().toString())
+                .contains(TEST_CONTENT_DESCRIPTION);
+        assertThat(mPreference.isLinkEnabled()).isTrue();
+    }
+}