diff --git a/api/system-current.txt b/api/system-current.txt
index 07319f3269cd8..7d9cf5f31b9db 100755
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -4281,7 +4281,9 @@ package android.net {
 
   public class CaptivePortal implements android.os.Parcelable {
     method public void logEvent(int, @NonNull String);
+    method public void reevaluateNetwork();
     method public void useNetwork();
+    field public static final int APP_REQUEST_REEVALUATION_REQUIRED = 100; // 0x64
     field public static final int APP_RETURN_DISMISSED = 0; // 0x0
     field public static final int APP_RETURN_UNWANTED = 1; // 0x1
     field public static final int APP_RETURN_WANTED_AS_IS = 2; // 0x2
diff --git a/api/test-current.txt b/api/test-current.txt
index 7736b32a40619..9b702bb6a7efe 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -1350,7 +1350,9 @@ package android.net {
 
   public class CaptivePortal implements android.os.Parcelable {
     method public void logEvent(int, @NonNull String);
+    method public void reevaluateNetwork();
     method public void useNetwork();
+    field public static final int APP_REQUEST_REEVALUATION_REQUIRED = 100; // 0x64
     field public static final int APP_RETURN_DISMISSED = 0; // 0x0
     field public static final int APP_RETURN_UNWANTED = 1; // 0x1
     field public static final int APP_RETURN_WANTED_AS_IS = 2; // 0x2
diff --git a/core/java/android/net/CaptivePortal.java b/core/java/android/net/CaptivePortal.java
index a66fcae7d4a29..fb35b4bde3039 100644
--- a/core/java/android/net/CaptivePortal.java
+++ b/core/java/android/net/CaptivePortal.java
@@ -60,6 +60,18 @@ public class CaptivePortal implements Parcelable {
     @SystemApi
     @TestApi
     public static final int APP_RETURN_WANTED_AS_IS = 2;
+    /** Event offset of request codes from captive portal application. */
+    private static final int APP_REQUEST_BASE = 100;
+    /**
+     * Request code from the captive portal application, indicating that the network condition may
+     * have changed and the network should be re-validated.
+     * @see ICaptivePortal#appRequest(int)
+     * @see android.net.INetworkMonitor#forceReevaluation(int)
+     * @hide
+     */
+    @SystemApi
+    @TestApi
+    public static final int APP_REQUEST_REEVALUATION_REQUIRED = APP_REQUEST_BASE + 0;
 
     private final IBinder mBinder;
 
@@ -135,6 +147,19 @@ public class CaptivePortal implements Parcelable {
         }
     }
 
+    /**
+     * Request that the system reevaluates the captive portal status.
+     * @hide
+     */
+    @SystemApi
+    @TestApi
+    public void reevaluateNetwork() {
+        try {
+            ICaptivePortal.Stub.asInterface(mBinder).appRequest(APP_REQUEST_REEVALUATION_REQUIRED);
+        } catch (RemoteException e) {
+        }
+    }
+
     /**
      * Log a captive portal login event.
      * @param eventId one of the CAPTIVE_PORTAL_LOGIN_* constants in metrics_constants.proto.
diff --git a/core/java/android/net/ICaptivePortal.aidl b/core/java/android/net/ICaptivePortal.aidl
index 707b4f699873a..fe21905c70029 100644
--- a/core/java/android/net/ICaptivePortal.aidl
+++ b/core/java/android/net/ICaptivePortal.aidl
@@ -21,6 +21,7 @@ package android.net;
  * @hide
  */
 oneway interface ICaptivePortal {
+    void appRequest(int request);
     void appResponse(int response);
     void logEvent(int eventId, String packageName);
 }
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index 3a8a73657f396..657207237bf02 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -3609,16 +3609,31 @@ public class ConnectivityService extends IConnectivityManager.Stub
                 enforceSettingsPermission();
             }
 
-            // getNetworkAgentInfoForNetwork is thread-safe
-            final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(mNetwork);
-            if (nai == null) return;
-
-            // nai.networkMonitor() is thread-safe
-            final NetworkMonitorManager nm = nai.networkMonitor();
+            final NetworkMonitorManager nm = getNetworkMonitorManager(mNetwork);
             if (nm == null) return;
             nm.notifyCaptivePortalAppFinished(response);
         }
 
+        @Override
+        public void appRequest(final int request) {
+            final NetworkMonitorManager nm = getNetworkMonitorManager(mNetwork);
+            if (nm == null) return;
+
+            if (request == CaptivePortal.APP_REQUEST_REEVALUATION_REQUIRED) {
+                nm.forceReevaluation(Binder.getCallingUid());
+            }
+        }
+
+        @Nullable
+        private NetworkMonitorManager getNetworkMonitorManager(final Network network) {
+            // getNetworkAgentInfoForNetwork is thread-safe
+            final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);
+            if (nai == null) return null;
+
+            // nai.networkMonitor() is thread-safe
+            return nai.networkMonitor();
+        }
+
         @Override
         public void logEvent(int eventId, String packageName) {
             enforceSettingsPermission();
diff --git a/tests/net/common/java/android/net/CaptivePortalTest.java b/tests/net/common/java/android/net/CaptivePortalTest.java
index eed7159ffddc5..ca4ba63142a20 100644
--- a/tests/net/common/java/android/net/CaptivePortalTest.java
+++ b/tests/net/common/java/android/net/CaptivePortalTest.java
@@ -43,6 +43,11 @@ public class CaptivePortalTest {
             mCode = response;
         }
 
+        @Override
+        public void appRequest(final int request) throws RemoteException {
+            mCode = request;
+        }
+
         @Override
         public void logEvent(int eventId, String packageName) throws RemoteException {
             mCode = eventId;
@@ -79,6 +84,12 @@ public class CaptivePortalTest {
         assertEquals(result.mCode, CaptivePortal.APP_RETURN_WANTED_AS_IS);
     }
 
+    @Test
+    public void testReevaluateNetwork() {
+        final MyCaptivePortalImpl result = runCaptivePortalTest(c -> c.reevaluateNetwork());
+        assertEquals(result.mCode, CaptivePortal.APP_REQUEST_REEVALUATION_REQUIRED);
+    }
+
     @Test
     public void testLogEvent() {
         final MyCaptivePortalImpl result = runCaptivePortalTest(c -> c.logEvent(