Add a toggle switch for accessibility large pointer icons.

Bug: 25778857
Change-Id: I85f23253dda73b315aa8b1a612cb556f843d94db

res/values/strings.xml

@@ -3661,6 +3661,8 @@
     <string name="accessibility_power_button_ends_call_prerefence_title">Power button ends call</string>
     <!-- Title for the accessibility preference to speak passwords. [CHAR LIMIT=35] -->
     <string name="accessibility_toggle_speak_password_preference_title">Speak passwords</string>
+    <!-- Title for the accessibility preference for enabling/disabling large icons for mouse/trackpad pointers. [CHAR LIMIT=35] -->
+    <string name="accessibility_toggle_large_pointer_icon_title">Large mouse/trackpad pointer icons</string>
     <!-- Title for accessibility preference to choose long-press delay i.e. timeout before it is detected. [CHAR LIMIT=35] -->
     <string name="accessibility_long_press_timeout_preference_title">Touch &amp; hold delay</string>
     <!-- Title for the accessibility preference to configure display color inversion. [CHAR LIMIT=NONE] -->

res/xml/accessibility_settings.xml

@@ -68,6 +68,10 @@
                 android:title="@string/accessibility_toggle_speak_password_preference_title"
                 android:persistent="false"/>
 
+        <SwitchPreference
+                android:key="toggle_large_pointer_icon"
+                android:title="@string/accessibility_toggle_large_pointer_icon_title" />
+
         <PreferenceScreen
                 android:fragment="com.android.settings.accessibility.ToggleGlobalGesturePreferenceFragment"
                 android:key="enable_global_gesture_preference_screen"

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

@@ -85,6 +85,8 @@ public class AccessibilitySettings extends SettingsPreferenceFragment implements
             "toggle_lock_screen_rotation_preference";
     private static final String TOGGLE_SPEAK_PASSWORD_PREFERENCE =
             "toggle_speak_password_preference";
+    private static final String TOGGLE_LARGE_POINTER_ICON =
+            "toggle_large_pointer_icon";
     private static final String SELECT_LONG_PRESS_TIMEOUT_PREFERENCE =
             "select_long_press_timeout_preference";
     private static final String ENABLE_ACCESSIBILITY_GESTURE_PREFERENCE_SCREEN =
@@ -181,6 +183,7 @@ public class AccessibilitySettings extends SettingsPreferenceFragment implements
     private SwitchPreference mTogglePowerButtonEndsCallPreference;
     private SwitchPreference mToggleLockScreenRotationPreference;
     private SwitchPreference mToggleSpeakPasswordPreference;
+    private SwitchPreference mToggleLargePointerIconPreference;
     private ListPreference mSelectLongPressTimeoutPreference;
     private Preference mNoServicesMessagePreference;
     private PreferenceScreen mCaptioningPreferenceScreen;
@@ -278,6 +281,9 @@ public class AccessibilitySettings extends SettingsPreferenceFragment implements
         } else if (mToggleSpeakPasswordPreference == preference) {
             handleToggleSpeakPasswordPreferenceClick();
             return true;
+        } else if (mToggleLargePointerIconPreference == preference) {
+            handleToggleLargePointerIconPreferenceClick();
+            return true;
         } else if (mGlobalGesturePreferenceScreen == preference) {
             handleToggleEnableAccessibilityGesturePreferenceClick();
             return true;
@@ -322,6 +328,12 @@ public class AccessibilitySettings extends SettingsPreferenceFragment implements
                 mToggleSpeakPasswordPreference.isChecked() ? 1 : 0);
     }
 
+    private void handleToggleLargePointerIconPreferenceClick() {
+        Settings.Secure.putInt(getContentResolver(),
+                Settings.Secure.ACCESSIBILITY_LARGE_POINTER_ICON,
+                mToggleLargePointerIconPreference.isChecked() ? 1 : 0);
+    }
+
     private void handleToggleEnableAccessibilityGesturePreferenceClick() {
         Bundle extras = mGlobalGesturePreferenceScreen.getExtras();
         extras.putString(EXTRA_TITLE, getString(
@@ -379,6 +391,10 @@ public class AccessibilitySettings extends SettingsPreferenceFragment implements
         mToggleSpeakPasswordPreference =
                 (SwitchPreference) findPreference(TOGGLE_SPEAK_PASSWORD_PREFERENCE);
 
+        // Large pointer icon.
+        mToggleLargePointerIconPreference =
+                (SwitchPreference) findPreference(TOGGLE_LARGE_POINTER_ICON);
+
         // Long press timeout.
         mSelectLongPressTimeoutPreference =
                 (ListPreference) findPreference(SELECT_LONG_PRESS_TIMEOUT_PREFERENCE);
@@ -565,6 +581,10 @@ public class AccessibilitySettings extends SettingsPreferenceFragment implements
                 Settings.Secure.ACCESSIBILITY_SPEAK_PASSWORD, 0) != 0;
         mToggleSpeakPasswordPreference.setChecked(speakPasswordEnabled);
 
+        // Large pointer icon.
+        mToggleLargePointerIconPreference.setChecked(Settings.Secure.getInt(getContentResolver(),
+                Settings.Secure.ACCESSIBILITY_LARGE_POINTER_ICON, 0) != 0);
+
         // Long press timeout.
         final int longPressTimeout = Settings.Secure.getInt(getContentResolver(),
                 Settings.Secure.LONG_PRESS_TIMEOUT, mLongPressTimeoutDefault);