diff --git a/src/com/android/settings/accessibility/ScreenFlashNotificationColorDialogFragment.java b/src/com/android/settings/accessibility/ScreenFlashNotificationColorDialogFragment.java
index 5094154..2be843c 100644
--- a/src/com/android/settings/accessibility/ScreenFlashNotificationColorDialogFragment.java
+++ b/src/com/android/settings/accessibility/ScreenFlashNotificationColorDialogFragment.java
@@ -28,11 +28,13 @@
 import android.graphics.Color;
 import android.os.Bundle;
 import android.os.UserHandle;
+import android.provider.Settings;
 import android.view.View;
 
 import androidx.annotation.ColorInt;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
 import androidx.appcompat.app.AlertDialog;
 import androidx.fragment.app.DialogFragment;
 
@@ -40,8 +42,6 @@
 
 import java.util.Timer;
 import java.util.TimerTask;
-import java.util.function.Consumer;
-
 
 /**
  * DialogFragment for Screen flash notification color picker.
@@ -49,29 +49,33 @@
 public class ScreenFlashNotificationColorDialogFragment extends DialogFragment implements
         ColorSelectorLayout.OnCheckedChangeListener {
 
+    private static final int DEFAULT_COLOR = Color.TRANSPARENT;
     private static final int PREVIEW_LONG_TIME_MS = 5000;
     private static final int BETWEEN_STOP_AND_START_DELAY_MS = 250;
     private static final int MARGIN_FOR_STOP_DELAY_MS = 100;
 
+    @VisibleForTesting
+    static final String EXTRA_COLOR = "extra_color";
     @ColorInt
-    private int mCurrentColor = Color.TRANSPARENT;
-    private Consumer<Integer> mConsumer;
+    private int mCurrentColor = DEFAULT_COLOR;
 
     private Timer mTimer = null;
     private Boolean mIsPreview = false;
 
-    static ScreenFlashNotificationColorDialogFragment getInstance(int initialColor,
-            Consumer<Integer> colorConsumer) {
+    static ScreenFlashNotificationColorDialogFragment getInstance(int initialColor) {
         final ScreenFlashNotificationColorDialogFragment result =
                 new ScreenFlashNotificationColorDialogFragment();
-        result.mCurrentColor = initialColor;
-        result.mConsumer = colorConsumer != null ? colorConsumer : i -> {};
+        Bundle bundle = new Bundle();
+        bundle.putInt(EXTRA_COLOR, initialColor);
+        result.setArguments(bundle);
         return result;
     }
 
     @NonNull
     @Override
     public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
+        mCurrentColor = getArguments().getInt(EXTRA_COLOR, DEFAULT_COLOR);
+
         final View dialogView = getLayoutInflater().inflate(R.layout.layout_color_selector_dialog,
                 null);
 
@@ -90,7 +94,8 @@
                 })
                 .setPositiveButton(R.string.color_selector_dialog_save, (dialog, which) -> {
                     mCurrentColor = colorSelectorLayout.getCheckedColor(DEFAULT_SCREEN_FLASH_COLOR);
-                    mConsumer.accept(mCurrentColor);
+                    Settings.System.putInt(getContext().getContentResolver(),
+                            Settings.System.SCREEN_FLASH_NOTIFICATION_COLOR, mCurrentColor);
                 })
                 .create();
         createdDialog.setOnShowListener(
diff --git a/src/com/android/settings/accessibility/ScreenFlashNotificationPreferenceController.java b/src/com/android/settings/accessibility/ScreenFlashNotificationPreferenceController.java
index bd54aca..3ebcd1c 100644
--- a/src/com/android/settings/accessibility/ScreenFlashNotificationPreferenceController.java
+++ b/src/com/android/settings/accessibility/ScreenFlashNotificationPreferenceController.java
@@ -21,10 +21,17 @@
 import static com.android.settings.accessibility.FlashNotificationsUtil.DEFAULT_SCREEN_FLASH_COLOR;
 
 import android.content.Context;
+import android.database.ContentObserver;
 import android.graphics.Color;
+import android.net.Uri;
+import android.os.Handler;
 import android.provider.Settings;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
+import androidx.lifecycle.DefaultLifecycleObserver;
+import androidx.lifecycle.LifecycleOwner;
 import androidx.preference.Preference;
 import androidx.preference.PreferenceScreen;
 
@@ -32,18 +39,21 @@
 import com.android.settings.core.TogglePreferenceController;
 import com.android.settings.overlay.FeatureFactory;
 
-import java.util.function.Consumer;
-
 /**
  * Controller for Screen flash notification.
  */
-public class ScreenFlashNotificationPreferenceController extends TogglePreferenceController {
+public class ScreenFlashNotificationPreferenceController extends
+        TogglePreferenceController implements DefaultLifecycleObserver {
+
+    private final FlashNotificationColorContentObserver mFlashNotificationColorContentObserver;
 
     private Fragment mParentFragment;
     private Preference mPreference;
 
     public ScreenFlashNotificationPreferenceController(Context context, String preferenceKey) {
         super(context, preferenceKey);
+        mFlashNotificationColorContentObserver = new FlashNotificationColorContentObserver(
+                new Handler(mContext.getMainLooper()));
     }
 
     public void setParentFragment(Fragment parentFragment) {
@@ -51,6 +61,16 @@
     }
 
     @Override
+    public void onStart(@NonNull LifecycleOwner owner) {
+        mFlashNotificationColorContentObserver.register(mContext);
+    }
+
+    @Override
+    public void onStop(@NonNull LifecycleOwner owner) {
+        mFlashNotificationColorContentObserver.unregister(mContext);
+    }
+
+    @Override
     public int getAvailabilityStatus() {
         return AVAILABLE;
     }
@@ -100,14 +120,8 @@
                     Settings.System.SCREEN_FLASH_NOTIFICATION_COLOR,
                     DEFAULT_SCREEN_FLASH_COLOR);
 
-            final Consumer<Integer> consumer = color -> {
-                Settings.System.putInt(mContext.getContentResolver(),
-                        Settings.System.SCREEN_FLASH_NOTIFICATION_COLOR, color);
-                refreshColorSummary();
-            };
-
             ScreenFlashNotificationColorDialogFragment
-                    .getInstance(initialColor, consumer)
+                    .getInstance(initialColor)
                     .show(mParentFragment.getParentFragmentManager(),
                             ScreenFlashNotificationColorDialogFragment.class.getSimpleName());
             return true;
@@ -128,4 +142,37 @@
     private void refreshColorSummary() {
         if (mPreference != null) mPreference.setSummary(getSummary());
     }
+
+    private final class FlashNotificationColorContentObserver extends ContentObserver {
+        private final Uri mColorUri = Settings.System.getUriFor(
+                Settings.System.SCREEN_FLASH_NOTIFICATION_COLOR);
+
+        FlashNotificationColorContentObserver(Handler handler) {
+            super(handler);
+        }
+
+        /**
+         * Register this observer to given {@link Context}, to be called from lifecycle
+         * {@code onStart} method.
+         */
+        public void register(@NonNull Context context) {
+            context.getContentResolver().registerContentObserver(
+                    mColorUri, /* notifyForDescendants= */ false, this);
+        }
+
+        /**
+         * Unregister this observer from given {@link Context}, to be called from lifecycle
+         * {@code onStop} method.
+         */
+        public void unregister(@NonNull Context context) {
+            context.getContentResolver().unregisterContentObserver(this);
+        }
+
+        @Override
+        public void onChange(boolean selfChange, @Nullable Uri uri) {
+            if (mColorUri.equals(uri)) {
+                refreshColorSummary();
+            }
+        }
+    }
 }
diff --git a/tests/robotests/src/com/android/settings/accessibility/ScreenFlashNotificationColorDialogFragmentTest.java b/tests/robotests/src/com/android/settings/accessibility/ScreenFlashNotificationColorDialogFragmentTest.java
index f3fa69d..ea48253 100644
--- a/tests/robotests/src/com/android/settings/accessibility/ScreenFlashNotificationColorDialogFragmentTest.java
+++ b/tests/robotests/src/com/android/settings/accessibility/ScreenFlashNotificationColorDialogFragmentTest.java
@@ -37,10 +37,13 @@
 
 import android.content.Intent;
 import android.graphics.Color;
+import android.os.Bundle;
+import android.provider.Settings;
 
 import androidx.appcompat.app.AlertDialog;
 import androidx.fragment.app.testing.FragmentScenario;
 import androidx.lifecycle.Lifecycle;
+import androidx.test.core.app.ApplicationProvider;
 
 import com.android.settings.R;
 import com.android.settings.testutils.FakeTimer;
@@ -56,23 +59,26 @@
 
 import java.util.List;
 import java.util.Timer;
-import java.util.function.Consumer;
 
 @RunWith(RobolectricTestRunner.class)
 public class ScreenFlashNotificationColorDialogFragmentTest {
 
+    private static final int DEFAULT_COLOR = ROSE.mColorInt;
+
     private FragmentScenario<TestScreenFlashNotificationColorDialogFragment> mFragmentScenario;
     private ScreenFlashNotificationColorDialogFragment mDialogFragment;
     private AlertDialog mAlertDialog;
     private ColorSelectorLayout mColorSelectorLayout;
-    private int mCurrentColor;
 
     @Before
     public void setUp() {
-        mCurrentColor = ROSE.mColorInt;
+        Settings.System.putInt(ApplicationProvider.getApplicationContext().getContentResolver(),
+                Settings.System.SCREEN_FLASH_NOTIFICATION_COLOR, DEFAULT_COLOR);
+        Bundle fragmentArgs = new Bundle();
+        fragmentArgs.putInt(ScreenFlashNotificationColorDialogFragment.EXTRA_COLOR, DEFAULT_COLOR);
         mFragmentScenario = FragmentScenario.launch(
                 TestScreenFlashNotificationColorDialogFragment.class,
-                /* fragmentArgs= */ null,
+                fragmentArgs,
                 R.style.Theme_AlertDialog_SettingsLib,
                 Lifecycle.State.INITIALIZED);
         setupFragment();
@@ -99,7 +105,7 @@
         performClickOnDialog(BUTTON_NEUTRAL);
         getTimerFromFragment().runOneTask();
 
-        assertStartPreview(ROSE.mColorInt);
+        assertStartPreview(DEFAULT_COLOR);
     }
 
     @Test
@@ -168,20 +174,26 @@
     }
 
     @Test
-    public void clickColorAndClickNegative_assertColor() {
+    public void clickColorAndClickNegative_assertDefaultColor() {
         checkColorButton(AZURE);
         performClickOnDialog(BUTTON_NEGATIVE);
 
         assertThat(getTimerFromFragment()).isNull();
-        assertThat(mCurrentColor).isEqualTo(ROSE.mColorInt);
+        assertThat(Settings.System.getInt(
+                ApplicationProvider.getApplicationContext().getContentResolver(),
+                Settings.System.SCREEN_FLASH_NOTIFICATION_COLOR, AZURE.mColorInt)).isEqualTo(
+                DEFAULT_COLOR);
     }
 
     @Test
-    public void clickColorAndClickPositive_assertColor() {
+    public void clickColorAndClickPositive_assertSameColor() {
         checkColorButton(BLUE);
         performClickOnDialog(BUTTON_POSITIVE);
 
-        assertThat(mCurrentColor).isEqualTo(BLUE.mColorInt);
+        assertThat(Settings.System.getInt(
+                ApplicationProvider.getApplicationContext().getContentResolver(),
+                Settings.System.SCREEN_FLASH_NOTIFICATION_COLOR, DEFAULT_COLOR)).isEqualTo(
+                BLUE.mColorInt);
     }
 
     private void checkColorButton(ScreenFlashNotificationColor color) {
@@ -201,11 +213,6 @@
     }
 
     private void setupFragment() {
-        mFragmentScenario.onFragment(fragment -> {
-            ReflectionHelpers.setField(fragment, "mCurrentColor", mCurrentColor);
-            ReflectionHelpers.setField(fragment, "mConsumer",
-                    (Consumer<Integer>) selectedColor -> mCurrentColor = selectedColor);
-        });
         mFragmentScenario.moveToState(Lifecycle.State.RESUMED);
 
         mFragmentScenario.onFragment(fragment -> {
diff --git a/tests/robotests/src/com/android/settings/accessibility/ScreenFlashNotificationPreferenceControllerTest.java b/tests/robotests/src/com/android/settings/accessibility/ScreenFlashNotificationPreferenceControllerTest.java
index 95a9438..d7c1a0f 100644
--- a/tests/robotests/src/com/android/settings/accessibility/ScreenFlashNotificationPreferenceControllerTest.java
+++ b/tests/robotests/src/com/android/settings/accessibility/ScreenFlashNotificationPreferenceControllerTest.java
@@ -57,8 +57,6 @@
 import org.robolectric.annotation.Implements;
 import org.robolectric.annotation.Resetter;
 
-import java.util.function.Consumer;
-
 @RunWith(RobolectricTestRunner.class)
 @Config(shadows = {
         ScreenFlashNotificationPreferenceControllerTest
@@ -83,7 +81,6 @@
     private FragmentManager mFragmentManager;
     @Mock
     private ScreenFlashNotificationColorDialogFragment mDialogFragment;
-
     private ScreenFlashNotificationPreferenceController mController;
     private ContentResolver mContentResolver;
 
@@ -92,6 +89,7 @@
         MockitoAnnotations.initMocks(this);
         FragmentActivity fragmentActivity = Robolectric.setupActivity(FragmentActivity.class);
         Context context = fragmentActivity.getApplicationContext();
+
         ShadowScreenFlashNotificationColorDialogFragment.setInstance(mDialogFragment);
         ShadowFlashNotificationsUtils.setColorDescriptionText(COLOR_DESCRIPTION_TEXT);
 
@@ -99,8 +97,9 @@
         mController = new ScreenFlashNotificationPreferenceController(context, PREFERENCE_KEY);
         when(mPreferenceScreen.findPreference(PREFERENCE_KEY)).thenReturn(mPreference);
         when(mPreference.getKey()).thenReturn(PREFERENCE_KEY);
-        mController.setParentFragment(mParentFragment);
         when(mParentFragment.getParentFragmentManager()).thenReturn(mFragmentManager);
+
+        mController.setParentFragment(mParentFragment);
     }
 
     @After
@@ -181,6 +180,7 @@
     @Test
     public void handlePreferenceTreeClick() {
         mController.handlePreferenceTreeClick(mPreference);
+
         verify(mDialogFragment).show(any(FragmentManager.class), anyString());
     }
 
@@ -194,7 +194,7 @@
 
         @Implementation
         protected static ScreenFlashNotificationColorDialogFragment getInstance(
-                int initialColor, Consumer<Integer> colorConsumer) {
+                int initialColor) {
             return sInstance;
         }