Add IntDef annotation to gravity field

This change adds IntDef annotation to the gravity field in LayoutParams.

Bug: 173682107
Test: run `mp :framework-minus-apex-intdefs` and see that the Gravity
mapping was generated

Change-Id: I030241f72b07aeea0c625e5b557dfcc800f537d9

1 files changed, 31 insertions, 0 deletions

diff --git a/core/java/android/view/Gravity.java b/core/java/android/view/Gravity.java
index defa58e10e6e..c8bfd36b2b48 100644
--- a/core/java/android/view/Gravity.java
+++ b/core/java/android/view/Gravity.java
@@ -15,8 +15,13 @@
  */
 
 package android.view;
+
+import android.annotation.IntDef;
 import android.graphics.Rect;
 
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
 /**
  * Standard constants and tools for placing an object within a potentially
  * larger container.
@@ -122,6 +127,32 @@ public class Gravity
      */
     public static final int RELATIVE_HORIZONTAL_GRAVITY_MASK = START | END;
 
+
+    /**
+     * @hide
+     */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(flag = true, value = {
+        Gravity.FILL,
+        Gravity.FILL_HORIZONTAL,
+        Gravity.FILL_VERTICAL,
+        Gravity.START,
+        Gravity.END,
+        Gravity.LEFT,
+        Gravity.RIGHT,
+        Gravity.TOP,
+        Gravity.BOTTOM,
+        Gravity.CENTER,
+        Gravity.CENTER_HORIZONTAL,
+        Gravity.CENTER_VERTICAL,
+        Gravity.DISPLAY_CLIP_HORIZONTAL,
+        Gravity.DISPLAY_CLIP_VERTICAL,
+        Gravity.CLIP_HORIZONTAL,
+        Gravity.CLIP_VERTICAL,
+        Gravity.NO_GRAVITY
+    })
+    public @interface GravityFlags {}
+
     /**
      * Apply a gravity constant to an object. This supposes that the layout direction is LTR.
      *