我为浮动操作按钮实现了一个简单的隐藏/显示行为。
调用onNestedScroll事件,直到在浮动操作按钮上调用hide()或setVisiblity(View.GONE),然后它停止对滚动事件做出反应。 当fab的可见性变为GONE时,它似乎停止对滚动事件作出反应。
public class ScrollAwareFABBehavior extends FloatingActionButton.Behavior {
public ScrollAwareFABBehavior(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public boolean onStartNestedScroll(final CoordinatorLayout coordinatorLayout,
final FloatingActionButton child,
final View directTargetChild, final View target,
final int nestedScrollAxes) {
return nestedScrollAxes == ViewCompat.SCROLL_AXIS_VERTICAL
|| super.onStartNestedScroll(coordinatorLayout, child, directTargetChild, target, nestedScrollAxes);
}
@Override
public void onNestedScroll(CoordinatorLayout coordinatorLayout, FloatingActionButton child,
View target, int dxConsumed, int dyConsumed, int dxUnconsumed,
int dyUnconsumed) {
super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, dxUnconsumed,
dyUnconsumed);
if (dyConsumed > 0
&& child.getVisibility() == View.VISIBLE) {
child.hide();
} else if (dyConsumed < 0
&& child.getVisibility() != View.VISIBLE) {
child.show();
}
}
}
}
其他信息: 当我使用手动将visiblity设置为隐形时,它可以工作。但后来我错过了动画。
答案 0 :(得分:10)
似乎可以更改隐藏确定的行为,如下所述:https://stackoverflow.com/a/41386278/1038102
child.hide(new FloatingActionButton.OnVisibilityChangedListener()
@Override
public void onHidden(FloatingActionButton fab) {
super.onHidden(fab);
fab.setVisibility(View.INVISIBLE);
}
});