FloatingActionButton导致CreateCircularReveal失败

Question

我有一个带卡片视图的片段，当我尝试添加一个导致动画失败的FloatingActionButton时..视图只显示没有动画..宽度和高度和半径都是正确的但是动画选择了＃ 39;跑。这只是在动画第一次运行时发生..我使用此版本的常规关闭按钮..

CODE

public static void ToogleView(View myView, bool show, Func<int> param = null) {

    // get the center for the clipping circle
    int cx = myView.Width / 2;
    int cy = myView.Height / 2;

    // get the final radius for the clipping circle
    float finalRadius = (float) Math.Sqrt(cx * cx + cy * cy);

    // create the animator for this view (the start radius is zero)
    Animator anim;
    if (show) {
        anim = ViewAnimationUtils.CreateCircularReveal (myView, cx, cy, 0, finalRadius);
    } else {
        anim = ViewAnimationUtils.CreateCircularReveal (myView, cx, cy, finalRadius, 0);
    }
    anim.SetDuration (500);
    anim.AnimationEnd += (object sender, EventArgs e) => {
        if(param != null) {
            param();
        }

        if(!show) {
            myView.Visibility = ViewStates.Invisible;
        }
    };
    // make the view visible and start the animation
    myView.Visibility = ViewStates.Visible;
    anim.Start();
}

XML

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:id="@+id/mapFragmentRoot"
    android:visibility="invisible"
    android:layout_height="match_parent">

    <android.support.v7.widget.CardView
        card_view:cardElevation="4dp"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="35dp"
        android:id="@+id/header"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:layout_marginBottom="30dp"
        card_view:cardBackgroundColor="@android:color/white"
        card_view:cardCornerRadius="0dp">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical">
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_weight="0.5"
                android:background="@android:color/darker_gray"
                android:layout_height="0dp">
                <RelativeLayout
                    android:id="@+id/mapFragmentMapCointatiner"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent">
                    <ProgressBar
                        style="@style/Widget.AppCompat.ProgressBar"
                        android:layout_width="wrap_content"
                        android:layout_centerInParent="true"
                        android:layout_height="wrap_content" />
                    <TextView
                        android:layout_height="wrap_content"
                        android:layout_width="wrap_content"
                        android:textColor="@android:color/white"
                        android:text="Hämtar närmaste hållplatser"
                        android:layout_centerInParent="true"
                        android:paddingTop="60dp"
                        android:background="@android:color/transparent" />
                </RelativeLayout>
            </LinearLayout>
            <LinearLayout
                android:layout_weight="0.5"
                android:layout_width="match_parent"
                android:layout_height="0dp">
                <RelativeLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent">
                    <ProgressBar
                        android:layout_centerInParent="true"
                        style="@style/Widget.AppCompat.ProgressBar"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content" />
                </RelativeLayout>
            </LinearLayout>
        </LinearLayout>
    </android.support.v7.widget.CardView>
    <!--android.support.design.widget.FloatingActionButton
        android:id="@+id/MapFragmentfabClose"
        android:elevation="12dp"
        card_view:backgroundTint="@android:color/holo_red_dark"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="top|right"
        android:layout_marginTop="5dp"
        android:layout_marginRight="5dp"
        android:src="@drawable/ic_close_white_48dp"
        card_view:layout_anchor="@id/header"
        card_view:layout_anchorGravity="top|right|end" /-->

</FrameLayout>