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Commit 8926f912 authored by TreeHugger Robot's avatar TreeHugger Robot Committed by Automerger Merge Worker
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Merge "Exception if receive move withouth down" into rvc-dev am: 46c51b71 

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11056879

Change-Id: Ic1065ae4be0aaa260e016791d0b4f6b1146a1468
parents 4b619dd9 46c51b71

core/java/android/view/GestureDetector.java

+14 −0
Original line number Diff line number Diff line
@@ -288,6 +288,11 @@ public class GestureDetector { 
     */

    private VelocityTracker mVelocityTracker;



    /**

     * True if the detector can throw exception when touch steam is unexpected .

     */

    private boolean mExceptionForTouchStream;



    /**

     * Consistency verifier for debugging purposes.

     */
@@ -467,6 +472,8 @@ public class GestureDetector { 
        mTouchSlopSquare = touchSlop * touchSlop;

        mDoubleTapTouchSlopSquare = doubleTapTouchSlop * doubleTapTouchSlop;

        mDoubleTapSlopSquare = doubleTapSlop * doubleTapSlop;

        mExceptionForTouchStream = context != null

                && context.getApplicationInfo().targetSdkVersion >= Build.VERSION_CODES.R;

    }



    /**
@@ -639,6 +646,13 @@ public class GestureDetector { 
                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;

                }