package com.vortex.test;
import android.content.Context;
import android.support.annotation.NonNull;
import android.support.design.widget.CoordinatorLayout;
import android.support.design.widget.FloatingActionButton;
import android.util.AttributeSet;
import android.view.View;
/**
* Created by Administrator (chenPS) on 2019/11/21.
*/
public class MyHehavior extends FloatingActionButton.Behavior {
/** 构造方法必须得有
*/
public MyHehavior() {
}
public MyHehavior(Context context, AttributeSet attrs) {
super(context, attrs);
}
/**
*竖直方向必须得有
*/
@Override
public boolean onStartNestedScroll(@NonNull CoordinatorLayout coordinatorLayout, @NonNull FloatingActionButton child, @NonNull View directTargetChild, @NonNull View target, int axes, int type) {
return axes==CoordinatorLayout.SCROLL_AXIS_VERTICAL;
}
@Override
public void onNestedScroll(@NonNull CoordinatorLayout coordinatorLayout,
@NonNull final FloatingActionButton child,
@NonNull View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int type) {
//隐藏原来的hide是有问题的 不会再显示出来 调用setinvisible 而且可以在此处添加 show hide的监听
if((dyConsumed>0||dyConsumed>0)&&child.getVisibility()==View.VISIBLE){
child.hide(new FloatingActionButton.OnVisibilityChangedListener() {
@Override
public void onHidden(FloatingActionButton fab) {
super.onHidden(fab);
fab.setVisibility(View.INVISIBLE);
}
});
}else if((dyConsumed<0||dyConsumed<0)&&child.getVisibility()!=View.VISIBLE){
child.show(new FloatingActionButton.OnVisibilityChangedListener() {
@Override
public void onShown(FloatingActionButton fab) {
super.onShown(fab);
fab.setVisibility(View.VISIBLE);
}
});
}
}
}
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