commit e544490e3e7e4198ffa49224bc46c3e2d5de2765
author Robert Snoeberger <snoeberger@google.com> Wed Jun 03 18:48:19 2020 +0000
committer android-build-team Robot <android-build-team-robot@google.com> Wed Jun 03 21:43:32 2020 +0000
tree 143099b59d1a7f6977488adabdeb725e45b14bb1
parent 5163e38b6f960b454e441645df90754b49937eca

Revert "Exception if receive move withouth down"

This reverts commit a0a20dc23babe74e4ba59262323280367ad76185.

Reason for revert: This is causing a number of fatal crashes in SystemUI. See b/158081578, b/158057055, b/158060735, and b/158061923.

Fixes: 158081578
Fixes: 158057055
Fixes: 158060735
Fixes: 158061923
Change-Id: If7e6cd4ade3df540ba7d97d9265564132a235292
(cherry picked from commit 0ef6f01bd1f47594af77d5024a8115dfd2b46116)

core/java/android/view/GestureDetector.java

diff --git a/core/java/android/view/GestureDetector.java b/core/java/android/view/GestureDetector.java
index a9af595..f6c72c4 100644
--- a/core/java/android/view/GestureDetector.java
+++ b/core/java/android/view/GestureDetector.java
@@ -289,11 +289,6 @@
     private VelocityTracker mVelocityTracker;
 
     /**
-     * True if the detector can throw exception when touch steam is unexpected .
-     */
-    private boolean mExceptionForTouchStream;
-
-    /**
      * Consistency verifier for debugging purposes.
      */
     private final InputEventConsistencyVerifier mInputEventConsistencyVerifier =
@@ -472,8 +467,6 @@
         mTouchSlopSquare = touchSlop * touchSlop;
         mDoubleTapTouchSlopSquare = doubleTapTouchSlop * doubleTapTouchSlop;
         mDoubleTapSlopSquare = doubleTapSlop * doubleTapSlop;
-        mExceptionForTouchStream = context != null
-                && context.getApplicationInfo().targetSdkVersion >= Build.VERSION_CODES.R;
     }
 
     /**
@@ -646,13 +639,6 @@
                 break;
 
             case MotionEvent.ACTION_MOVE:
-                if (mExceptionForTouchStream && !mStillDown) {
-                    throw new IllegalStateException("Incomplete event stream received: "
-                            + "Received ACTION_MOVE before ACTION_DOWN. ACTION_DOWN must precede "
-                            + "ACTION_MOVE following ACTION_UP or ACTION_CANCEL, or when this "
-                            + "GestureDetector has not yet received any events.");
-                }
-
                 if (mInLongPress || mInContextClick) {
                     break;
                 }