协调器布局TextInput在FloatingActionButton下面(Coordinator layout TextInput below FloatingActionButton)

 Halloo伙计们我在协调员布局方面遇到问题。 我有TextInputLayout，在里面我有editText。 我想要的是点击左侧的FAB显示它并隐藏点击FAB。 
 
 但我总是有问题编辑文本在FAB下面： 
 
 只有我能够以某种方式做到这一点是使用marginRight ，请参阅下面的xml。 但是没有任何方法可以做到这一点我认为必须有更好的方法。 
 
<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="@dimen/fab_normal_size"
    android:layout_height="@dimen/fab_normal_size"
    android:layout_gravity="bottom|end"
    android:layout_margin="@dimen/fab_margin"
    app:fabSize="normal"
    android:src="@drawable/ic_add_black_24dp" />


<android.support.design.widget.TextInputLayout
    android:id="@+id/input_layout_txt"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:layout_anchor="@id/fab"
    app:layout_anchorGravity="left|center_vertical"
    android:layout_marginRight="@dimen/fab_normal_size">

    <EditText
        android:id="@+id/input_txt"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="banany"
        android:text="testestes....." />

Halloo guys I have problem here with coordinator layout. I have TextInputLayout and inside it I have editText. What I want is to show it on click on FAB on the left side and hide on click on FAB. 
 
But I have always problem with edit text going below FAB: 
 
Only way I was able to somehow do it is with using marginRight, see xml below. But is there any way to do it without that I think there must be better way. 
 
<android.support.design.widget.FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="@dimen/fab_normal_size"
    android:layout_height="@dimen/fab_normal_size"
    android:layout_gravity="bottom|end"
    android:layout_margin="@dimen/fab_margin"
    app:fabSize="normal"
    android:src="@drawable/ic_add_black_24dp" />


<android.support.design.widget.TextInputLayout
    android:id="@+id/input_layout_txt"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:layout_anchor="@id/fab"
    app:layout_anchorGravity="left|center_vertical"
    android:layout_marginRight="@dimen/fab_normal_size">

    <EditText
        android:id="@+id/input_txt"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="banany"
        android:text="testestes....." />

原文：https://stackoverflow.com/questions/37121028