diff --git a/src/com/android/settings/network/PrivateDnsModeDialogPreference.java b/src/com/android/settings/network/PrivateDnsModeDialogPreference.java
index 3a04ade..ad90e72 100644
--- a/src/com/android/settings/network/PrivateDnsModeDialogPreference.java
+++ b/src/com/android/settings/network/PrivateDnsModeDialogPreference.java
@@ -22,7 +22,6 @@
 import static android.system.OsConstants.AF_INET;
 import static android.system.OsConstants.AF_INET6;
 
-import android.app.AlertDialog;
 import android.content.ActivityNotFoundException;
 import android.content.ContentResolver;
 import android.content.Context;
@@ -52,6 +51,7 @@
 import java.util.Map;
 
 import androidx.annotation.VisibleForTesting;
+import androidx.appcompat.app.AlertDialog;
 
 /**
  * Dialog to set the Private DNS
@@ -72,7 +72,7 @@
         PRIVATE_DNS_MAP.put(PRIVATE_DNS_MODE_PROVIDER_HOSTNAME, R.id.private_dns_mode_provider);
     }
 
-    private static final int[] ADDRESS_FAMILIES = new int[]{AF_INET, AF_INET6};
+    private static final int[] ADDRESS_FAMILIES = new int[] {AF_INET, AF_INET6};
 
     @VisibleForTesting
     static final String MODE_KEY = Settings.Global.PRIVATE_DNS_MODE;
diff --git a/src/com/android/settings/widget/ValidatedEditTextPreference.java b/src/com/android/settings/widget/ValidatedEditTextPreference.java
index aec362f..76d8bcc 100644
--- a/src/com/android/settings/widget/ValidatedEditTextPreference.java
+++ b/src/com/android/settings/widget/ValidatedEditTextPreference.java
@@ -16,7 +16,6 @@
 
 package com.android.settings.widget;
 
-import android.app.AlertDialog;
 import android.content.Context;
 import android.text.Editable;
 import android.text.InputType;
@@ -30,6 +29,7 @@
 import com.android.settingslib.CustomEditTextPreferenceCompat;
 
 import androidx.annotation.VisibleForTesting;
+import androidx.appcompat.app.AlertDialog;
 import androidx.preference.PreferenceViewHolder;
 
 /**
diff --git a/tests/robotests/src/com/android/settings/network/PrivateDnsModeDialogPreferenceTest.java b/tests/robotests/src/com/android/settings/network/PrivateDnsModeDialogPreferenceTest.java
index 3e1cde1..cb26fb6 100644
--- a/tests/robotests/src/com/android/settings/network/PrivateDnsModeDialogPreferenceTest.java
+++ b/tests/robotests/src/com/android/settings/network/PrivateDnsModeDialogPreferenceTest.java
@@ -25,7 +25,6 @@
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
-import android.app.AlertDialog;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.DialogInterface;
@@ -49,6 +48,8 @@
 import org.robolectric.annotation.Config;
 import org.robolectric.util.ReflectionHelpers;
 
+import androidx.appcompat.app.AlertDialog;
+
 @RunWith(SettingsRobolectricTestRunner.class)
 @Config(shadows = ShadowOs.class)
 public class PrivateDnsModeDialogPreferenceTest {
@@ -132,9 +133,9 @@
     @Test
     public void testOnCheckedChanged_switchMode_saveButtonHasCorrectState() {
         final String[] INVALID_HOST_NAMES = new String[] {
-            INVALID_HOST_NAME,
-            "2001:db8::53",  // IPv6 string literal
-            "192.168.1.1",   // IPv4 string literal
+                INVALID_HOST_NAME,
+                "2001:db8::53",  // IPv6 string literal
+                "192.168.1.1",   // IPv4 string literal
         };
 
         for (String invalid : INVALID_HOST_NAMES) {