Merge "Fix cursor not blinking when view re-added to layout" am: 8412b132c7

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2553130

Change-Id: Icfcbff1ac3f98c852ed4e3583d72ca1b71d697f7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

core/java/android/widget/Editor.java

@@ -709,7 +709,10 @@ public class Editor {
         }
 
         getPositionListener().addSubscriber(mCursorAnchorInfoNotifier, true);
-        makeBlink();
+        // Call resumeBlink here instead of makeBlink to ensure that if mBlink is not null the
+        // Blink object is uncancelled.  This ensures when a view is removed and added back the
+        // cursor will resume blinking.
+        resumeBlink();
     }
 
     void onDetachedFromWindow() {
@@ -1081,8 +1084,10 @@ public class Editor {
     private void resumeBlink() {
         if (mBlink != null) {
             mBlink.uncancel();
-            makeBlink();
         }
+        // Moving makeBlink outside of the null check block ensures that mBlink object gets
+        // instantiated when the view is added to the window if mBlink is still null.
+        makeBlink();
     }
 
     void adjustInputType(boolean password, boolean passwordInputType,
@@ -2862,6 +2867,9 @@ public class Editor {
         if (shouldBlink()) {
             mShowCursor = SystemClock.uptimeMillis();
             if (mBlink == null) mBlink = new Blink();
+            // Call uncancel as mBlink could have previously been cancelled and cursor will not
+            // resume blinking unless uncancelled.
+            mBlink.uncancel();
             mTextView.removeCallbacks(mBlink);
             mTextView.postDelayed(mBlink, BLINK);
         } else {