diff --git a/services/core/java/com/android/server/clipboard/ClipboardService.java b/services/core/java/com/android/server/clipboard/ClipboardService.java
index db72c5e..efc930e 100644
--- a/services/core/java/com/android/server/clipboard/ClipboardService.java
+++ b/services/core/java/com/android/server/clipboard/ClipboardService.java
@@ -20,6 +20,7 @@
 import android.app.AppGlobals;
 import android.app.AppOpsManager;
 import android.app.IActivityManager;
+import android.app.KeyguardManager;
 import android.content.ClipData;
 import android.content.ClipDescription;
 import android.content.ContentProvider;
@@ -304,7 +305,7 @@
         public ClipData getPrimaryClip(String pkg) {
             synchronized (this) {
                 if (!clipboardAccessAllowed(AppOpsManager.OP_READ_CLIPBOARD, pkg,
-                            Binder.getCallingUid())) {
+                            Binder.getCallingUid()) || isDeviceLocked()) {
                     return null;
                 }
                 addActiveOwnerLocked(Binder.getCallingUid(), pkg);
@@ -316,7 +317,7 @@
         public ClipDescription getPrimaryClipDescription(String callingPackage) {
             synchronized (this) {
                 if (!clipboardAccessAllowed(AppOpsManager.OP_READ_CLIPBOARD, callingPackage,
-                            Binder.getCallingUid())) {
+                            Binder.getCallingUid()) || isDeviceLocked()) {
                     return null;
                 }
                 PerUserClipboard clipboard = getClipboard();
@@ -328,7 +329,7 @@
         public boolean hasPrimaryClip(String callingPackage) {
             synchronized (this) {
                 if (!clipboardAccessAllowed(AppOpsManager.OP_READ_CLIPBOARD, callingPackage,
-                            Binder.getCallingUid())) {
+                            Binder.getCallingUid()) || isDeviceLocked()) {
                     return false;
                 }
                 return getClipboard().primaryClip != null;
@@ -355,7 +356,7 @@
         public boolean hasClipboardText(String callingPackage) {
             synchronized (this) {
                 if (!clipboardAccessAllowed(AppOpsManager.OP_READ_CLIPBOARD, callingPackage,
-                            Binder.getCallingUid())) {
+                            Binder.getCallingUid()) || isDeviceLocked()) {
                     return false;
                 }
                 PerUserClipboard clipboard = getClipboard();
@@ -433,6 +434,12 @@
         }
     }
 
+    private boolean isDeviceLocked() {
+        final KeyguardManager keyguardManager = getContext().getSystemService(
+                    KeyguardManager.class);
+        return keyguardManager != null && keyguardManager.isDeviceLocked();
+    }
+
     private final void checkUriOwnerLocked(Uri uri, int uid) {
         if (!"content".equals(uri.getScheme())) {
             return;