// Same animation that FloatingActionButton.Behavior uses to show the FAB when the AppBarLayout
// enters
private void animateIn(FloatingActionButton button) {
button.setVisibility(View.VISIBLE);
Animation anim = AnimationUtils.loadAnimation(button.getContext(), R.anim.abc_slide_in_bottom);
anim.setDuration(600L);
anim.setInterpolator(INTERPOLATOR);
button.startAnimation(anim);
}
// Same animation that FloatingActionButton.Behavior uses to hide the FAB when the AppBarLayout
// exits
private void animateOut(final FloatingActionButton button) {
if (Build.VERSION.SDK_INT >= 14) {
ViewCompat.animate(button)
.scaleX(0.0F)
.scaleY(0.0F)
.alpha(0.0F)
.setInterpolator(INTERPOLATOR)
.withLayer()
.setListener(
new ViewPropertyAnimatorListener() {
public void onAnimationStart(View view) {
ScrollAwareFABBehavior.this.mIsAnimatingOut = true;
}
public void onAnimationCancel(View view) {
ScrollAwareFABBehavior.this.mIsAnimatingOut = false;
}
public void onAnimationEnd(View view) {
ScrollAwareFABBehavior.this.mIsAnimatingOut = false;
view.setVisibility(View.GONE);
}
})
.start();
} else {
Animation anim = AnimationUtils.loadAnimation(button.getContext(), android.R.anim.fade_out);
anim.setInterpolator(INTERPOLATOR);
anim.setDuration(200L);
anim.setAnimationListener(
new Animation.AnimationListener() {
public void onAnimationStart(Animation animation) {
ScrollAwareFABBehavior.this.mIsAnimatingOut = true;
}
public void onAnimationEnd(Animation animation) {
ScrollAwareFABBehavior.this.mIsAnimatingOut = false;
button.setVisibility(View.GONE);
}
@Override
public void onAnimationRepeat(final Animation animation) {}
});
button.startAnimation(anim);
}
}
// Same animation that FloatingActionButton.Behavior uses to show the FAB when the AppBarLayout
// enters
private void animateIn(FloatingActionButton button) {
button.setVisibility(View.VISIBLE);
if (Build.VERSION.SDK_INT >= 14) {
ViewCompat.animate(button)
.scaleX(1.0F)
.scaleY(1.0F)
.alpha(1.0F)
.setInterpolator(INTERPOLATOR)
.withLayer()
.setListener(null)
.start();
} else {
Animation anim = AnimationUtils.loadAnimation(button.getContext(), android.R.anim.fade_in);
anim.setDuration(200L);
anim.setInterpolator(INTERPOLATOR);
button.startAnimation(anim);
}
}
// Same animation that FloatingActionButton.Behavior uses to hide the FAB when the AppBarLayout
// exits
private void animateOut(final FloatingActionButton button) {
Animation anim = AnimationUtils.loadAnimation(button.getContext(), R.anim.abc_slide_out_bottom);
anim.setInterpolator(INTERPOLATOR);
anim.setDuration(600L);
anim.setAnimationListener(
new Animation.AnimationListener() {
public void onAnimationStart(Animation animation) {
ScrollAwareFABBehavior.this.mIsAnimatingOut = true;
}
public void onAnimationEnd(Animation animation) {
ScrollAwareFABBehavior.this.mIsAnimatingOut = false;
button.setVisibility(View.GONE);
}
@Override
public void onAnimationRepeat(final Animation animation) {}
});
button.startAnimation(anim);
}