Flexlayout隐藏子控件之后，子控件仍然占用空间 about flexlayout HOT 4 OPEN

<?xml version="1.0" encoding="utf-8"?>
<com.github.mmin18.widget.FlexLayout
	xmlns:android="http://schemas.android.com/apk/res/android"
	xmlns:app="http://schemas.android.com/apk/res-auto"
	android:layout_width="match_parent"
	android:layout_height="match_parent">

	<View
		android:layout_width="60dp"
		android:layout_height="60dp"
		android:background="#f00"
		app:layout_centerX="50%"
		app:layout_top="10dp"/>

	<TextView
		android:id="@+id/tv_high_speed_charge"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:text="tv_high_speed_charge"
		android:textColor="#fff"
		android:visibility="gone"
		app:layout_centerX="50%"
		app:layout_top="prev.bottom+15dp"/>

	<View
		android:layout_width="60dp"
		android:layout_height="60dp"
		android:background="#0f0"
		app:layout_centerX="50%"
		app:layout_top="tv_high_speed_charge.bottom"/>

	<Button
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:onClick="switchGone"
		android:text="switch"
		app:layout_centerX="50%"
		app:layout_centerY="50%"/>
</com.github.mmin18.widget.FlexLayout>

	public void switchGone(View v) {
		View g = findViewById(R.id.tv_high_speed_charge);
		g.setVisibility(g.getVisibility() == View.VISIBLE ? View.GONE : View.VISIBLE);
	}