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Commit 42902e3f authored by Johannes Gallmann's avatar Johannes Gallmann
Browse files

Slightly adjust spring force for 3-button-nav predictive back 

Bug: 373544911
Test: Manual, i.e. verified that common back animations feel smoother with the updated spring force.
Flag: com.android.window.flags.predictive_back_three_button_nav
Change-Id: I193fb3925b8653b8ae28b914da38124b9d3f0ca4
parent c60efe59

core/java/android/window/BackProgressAnimator.java

+2 −1
Original line number Diff line number Diff line
@@ -52,6 +52,7 @@ public class BackProgressAnimator implements DynamicAnimation.OnAnimationUpdateL 
     */

    private static final float SCALE_FACTOR = 100f;

    private static final float FLING_FRICTION = 8f;

    private static final float BUTTON_SPRING_STIFFNESS = 100;

    private final SpringAnimation mSpring;

    private ProgressCallback mCallback;

    private float mProgress = 0;
@@ -156,7 +157,7 @@ public class BackProgressAnimator implements DynamicAnimation.OnAnimationUpdateL 
                /* frameTime */ System.nanoTime() / TimeUtils.NANOS_PER_MS);

        if (predictiveBackSwipeEdgeNoneApi()) {

            if (event.getSwipeEdge() == EDGE_NONE) {

                mButtonSpringForce.setStiffness(SpringForce.STIFFNESS_LOW);

                mButtonSpringForce.setStiffness(BUTTON_SPRING_STIFFNESS);

                mSpring.setSpring(mButtonSpringForce);

                mSpring.animateToFinalPosition(SCALE_FACTOR);

            } else {