diff --git a/api/current.txt b/api/current.txt
index 5df8750fcb7c4..78b85015f0d2e 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -46665,6 +46665,7 @@ package android.widget {
     ctor public FrameLayout.LayoutParams(android.view.ViewGroup.LayoutParams);
     ctor public FrameLayout.LayoutParams(android.view.ViewGroup.MarginLayoutParams);
     ctor public FrameLayout.LayoutParams(android.widget.FrameLayout.LayoutParams);
+    field public static final int UNSPECIFIED_GRAVITY = -1; // 0xffffffff
     field public int gravity;
   }
 
diff --git a/api/system-current.txt b/api/system-current.txt
index 5ea800cba480b..14391a3770995 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -49966,6 +49966,7 @@ package android.widget {
     ctor public FrameLayout.LayoutParams(android.view.ViewGroup.LayoutParams);
     ctor public FrameLayout.LayoutParams(android.view.ViewGroup.MarginLayoutParams);
     ctor public FrameLayout.LayoutParams(android.widget.FrameLayout.LayoutParams);
+    field public static final int UNSPECIFIED_GRAVITY = -1; // 0xffffffff
     field public int gravity;
   }
 
diff --git a/api/test-current.txt b/api/test-current.txt
index e4b11bd2d4b5e..4e8327880ea67 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -46742,6 +46742,7 @@ package android.widget {
     ctor public FrameLayout.LayoutParams(android.view.ViewGroup.LayoutParams);
     ctor public FrameLayout.LayoutParams(android.view.ViewGroup.MarginLayoutParams);
     ctor public FrameLayout.LayoutParams(android.widget.FrameLayout.LayoutParams);
+    field public static final int UNSPECIFIED_GRAVITY = -1; // 0xffffffff
     field public int gravity;
   }
 
diff --git a/core/java/android/widget/FrameLayout.java b/core/java/android/widget/FrameLayout.java
index 9ac49172ec89a..029313c539389 100644
--- a/core/java/android/widget/FrameLayout.java
+++ b/core/java/android/widget/FrameLayout.java
@@ -416,23 +416,29 @@ public class FrameLayout extends ViewGroup {
      * @attr ref android.R.styleable#FrameLayout_Layout_layout_gravity
      */
     public static class LayoutParams extends MarginLayoutParams {
+        /**
+         * Value for {@link #gravity} indicating that a gravity has not been
+         * explicitly specified.
+         */
+        public static final int UNSPECIFIED_GRAVITY = -1;
+
         /**
          * The gravity to apply with the View to which these layout parameters
          * are associated.
          * <p>
-         * The default value is {@code Gravity.TOP | Gravity.START}
+         * The default value is {@link #UNSPECIFIED_GRAVITY}, which is treated
+         * by FrameLayout as {@code Gravity.TOP | Gravity.START}.
          *
          * @see android.view.Gravity
          * @attr ref android.R.styleable#FrameLayout_Layout_layout_gravity
          */
-        public int gravity = DEFAULT_CHILD_GRAVITY;
+        public int gravity = UNSPECIFIED_GRAVITY;
 
         public LayoutParams(@NonNull Context c, @Nullable AttributeSet attrs) {
             super(c, attrs);
 
             final TypedArray a = c.obtainStyledAttributes(attrs, R.styleable.FrameLayout_Layout);
-            gravity = a.getInt(R.styleable.FrameLayout_Layout_layout_gravity,
-                    DEFAULT_CHILD_GRAVITY);
+            gravity = a.getInt(R.styleable.FrameLayout_Layout_layout_gravity, UNSPECIFIED_GRAVITY);
             a.recycle();
         }