ShadowEdgeEffect

java.lang.Object

org.robolectric.shadows.ShadowEdgeEffect

@Implements(android.widget.EdgeEffect.class)
public class ShadowEdgeEffect
extends Object

Shadow for EdgeEffect

Constructor Summary

Constructors

Constructor Description

ShadowEdgeEffect()
Method Summary

Modifier and Type Method Description

protected int getCurrentEdgeEffectBehavior()
Disable edge effects for Android S and above.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- ShadowEdgeEffect
  
  public ShadowEdgeEffect()
Method Details
- getCurrentEdgeEffectBehavior
  
  @Implementation(minSdk=31) protected int getCurrentEdgeEffectBehavior()
  
  Disable edge effects for Android S and above. The problem with edge effects in S+ is that ScrollView will intercept/swallow all touch events while edge effects are still running (in ScrollView.onInterceptTouchEvent(MotionEvent). EdgeEffect completion depends on a free-running clock and draw traversals being continuously performed. So for Robolectric to ensure that edge effects are complete, it has to bump the uptime and then re-run draw traversals any time an edge effect starts.
  Because edge effects are not critical for unit testing, it is simpler to disable them.