Class ShadowEdgeEffect


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