Question

我试图获取多个水平链接的Button和TextView，并将它们垂直链接为视图集，但仍保持平面视图层次结构。这是我的初始布局和代码：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/btnTopLeft"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#eeeeee"
        app:layout_constraintBottom_toTopOf="@+id/lblTopLeft"
        app:layout_constraintEnd_toStartOf="@+id/btnTopRight"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:text="1"
        tools:textSize="42sp" />

    <TextView
        android:id="@+id/lblTopLeft"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:layout_constraintBottom_toTopOf="@+id/btnMiddleLeft"
        app:layout_constraintEnd_toEndOf="@id/btnTopLeft"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="@id/btnTopLeft"
        app:layout_constraintTop_toBottomOf="@+id/btnTopLeft"
        tools:text="Button 1" />

    <Button
        android:id="@+id/btnTopRight"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#dddddd"
        app:layout_constraintBottom_toTopOf="@+id/lblTopRight"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/btnTopLeft"
        app:layout_constraintTop_toTopOf="parent"
        tools:text="2"
        tools:textSize="42sp" />

    <TextView
        android:id="@+id/lblTopRight"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:layout_constraintBottom_toTopOf="@+id/btnMiddleRight"
        app:layout_constraintEnd_toEndOf="@id/btnTopRight"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="@id/btnTopRight"
        app:layout_constraintTop_toBottomOf="@+id/btnTopRight"
        tools:text="Button 2" />

    <Button
        android:id="@+id/btnMiddleLeft"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#cccccc"
        app:layout_constraintBottom_toTopOf="@+id/lblMiddleLeft"
        app:layout_constraintEnd_toStartOf="@+id/btnMiddleRight"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/lblTopLeft"
        tools:text="3"
        tools:textSize="42sp" />

    <TextView
        android:id="@+id/lblMiddleLeft"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:layout_constraintBottom_toTopOf="@+id/btnBottomLeft"
        app:layout_constraintEnd_toEndOf="@id/btnMiddleLeft"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="@id/btnMiddleLeft"
        app:layout_constraintTop_toBottomOf="@+id/btnMiddleLeft"
        tools:text="Button 3" />

    <Button
        android:id="@+id/btnMiddleRight"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#bbbbbb"
        app:layout_constraintBottom_toTopOf="@+id/lblMiddleRight"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/btnMiddleLeft"
        app:layout_constraintTop_toBottomOf="@+id/lblTopRight"
        tools:text="4"
        tools:textSize="42sp" />

    <TextView
        android:id="@+id/lblMiddleRight"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:layout_constraintBottom_toTopOf="@+id/btnBottomRight"
        app:layout_constraintEnd_toEndOf="@id/btnMiddleRight"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="@id/btnMiddleRight"
        app:layout_constraintTop_toBottomOf="@+id/btnMiddleRight"
        tools:text="Button 4" />

    <Button
        android:id="@+id/btnBottomLeft"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#aaaaaa"
        app:layout_constraintBottom_toTopOf="@+id/lblBottomLeft"
        app:layout_constraintEnd_toStartOf="@+id/btnBottomRight"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/lblMiddleLeft"
        tools:text="5"
        tools:textSize="42sp" />

    <TextView
        android:id="@+id/lblBottomLeft"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="@id/btnBottomLeft"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="@id/btnBottomLeft"
        app:layout_constraintTop_toBottomOf="@+id/btnBottomLeft"
        tools:text="Button 5" />

    <Button
        android:id="@+id/btnBottomRight"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#999999"
        app:layout_constraintBottom_toTopOf="@+id/lblBottomRight"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/btnBottomLeft"
        app:layout_constraintTop_toBottomOf="@+id/lblMiddleRight"
        tools:text="6"
        tools:textSize="42sp" />

    <TextView
        android:id="@+id/lblBottomRight"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="@id/btnBottomRight"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="@id/btnBottomRight"
        app:layout_constraintTop_toBottomOf="@+id/btnBottomRight"
        tools:text="Button 6" />

</android.support.constraint.ConstraintLayout>

设置按钮及其TextView的可见性时，我希望同一行上的按钮填充剩余的空间，但我希望其下方或上方的按钮保持在同一位置，直到该行上的两个按钮都已隐藏。一旦隐藏了同一行上的两个按钮，那么我想让其余的按钮填充剩余的空间。例如，这是我希望隐藏Button和TextView 3时的布局外观：

但是当前，如果我隐藏Button和TextView 3，这是当前发生的情况：

根据我当前的代码，这是预期的行为，但是我正在寻找一种方法，以防止垂直链塌陷直到按钮4也被隐藏。隐藏按钮4后，这是所需的结果：

我玩过障碍物，但是在任何地方放置障碍物似乎都会引起按钮动态高度的复杂化，因为它会破坏垂直链。谁能提供一些有关如何通过平面视图层次结构实现此目标的见识？

Answer 1

将屏幕分成三个垂直链接的 Views ，如下所示：

我设置了背景色以使视图更加突出，但是在实际实现中它们可能是透明的或设置为 invisible 。

现在，添加按钮和标签，以使它们垂直限制在这些视图的内部。这确实破坏了垂直链，但是垂直大小现在由基础视图的垂直链控制。按钮和标签仍链接到 ConstraintLayout 的侧面。

按钮和标签仍然像以前一样左右调整大小。但是，直到一行中的所有视图都都设置为“消失”之后，下面的按钮才会展开。

当一行中的所有按钮和标签也都设置为“ gone”时，您需要将基础视图设置为“ gone”，因此您需要跟踪一行中的按钮和标签的状态。

这是XML：

activity_main.xml

<android.support.constraint.ConstraintLayout 
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <View
        android:id="@+id/topGroup"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@android:color/holo_green_light"
        app:layout_constraintBottom_toTopOf="@id/centerGroup"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <View
        android:id="@+id/centerGroup"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@android:color/holo_blue_light"
        app:layout_constraintBottom_toTopOf="@id/bottomGroup"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/topGroup" />

    <View
        android:id="@+id/bottomGroup"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@android:color/holo_orange_light"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/centerGroup" />

    <Button
        android:id="@+id/btnTopLeft"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#eeeeee"
        app:layout_constraintBottom_toTopOf="@+id/lblTopLeft"
        app:layout_constraintEnd_toStartOf="@+id/btnTopRight"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@id/topGroup"
        tools:text="1"
        tools:textSize="42sp" />

    <TextView
        android:id="@+id/lblTopLeft"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:layout_constraintBottom_toBottomOf="@+id/topGroup"
        app:layout_constraintEnd_toEndOf="@id/btnTopLeft"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="@id/btnTopLeft"
        app:layout_constraintTop_toBottomOf="@+id/btnTopLeft"
        tools:text="Button 1" />

    <Button
        android:id="@+id/btnTopRight"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#dddddd"
        app:layout_constraintBottom_toTopOf="@+id/lblTopRight"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/btnTopLeft"
        app:layout_constraintTop_toTopOf="@id/topGroup"
        tools:text="2"
        tools:textSize="42sp" />

    <TextView
        android:id="@+id/lblTopRight"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:layout_constraintBottom_toBottomOf="@+id/topGroup"
        app:layout_constraintEnd_toEndOf="@id/btnTopRight"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="@id/btnTopRight"
        app:layout_constraintTop_toBottomOf="@+id/btnTopRight"
        tools:text="Button 2" />

    <Button
        android:id="@+id/btnMiddleLeft"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#cccccc"
        app:layout_constraintBottom_toTopOf="@+id/lblMiddleLeft"
        app:layout_constraintEnd_toStartOf="@+id/btnMiddleRight"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/centerGroup"
        tools:text="3"
        tools:textSize="42sp" />

    <TextView
        android:id="@+id/lblMiddleLeft"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:layout_constraintBottom_toBottomOf="@+id/centerGroup"
        app:layout_constraintEnd_toEndOf="@id/btnMiddleLeft"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="@id/btnMiddleLeft"
        app:layout_constraintTop_toBottomOf="@+id/btnMiddleLeft"
        tools:text="Button 3" />

    <Button
        android:id="@+id/btnMiddleRight"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#bbbbbb"
        app:layout_constraintBottom_toTopOf="@+id/lblMiddleRight"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/btnMiddleLeft"
        app:layout_constraintTop_toTopOf="@+id/centerGroup"
        tools:text="4"
        tools:textSize="42sp" />

    <TextView
        android:id="@+id/lblMiddleRight"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:layout_constraintBottom_toBottomOf="@+id/centerGroup"
        app:layout_constraintEnd_toEndOf="@id/btnMiddleRight"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="@id/btnMiddleRight"
        app:layout_constraintTop_toBottomOf="@+id/btnMiddleRight"
        tools:text="Button 4" />

    <Button
        android:id="@+id/btnBottomLeft"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#aaaaaa"
        app:layout_constraintBottom_toTopOf="@+id/lblBottomLeft"
        app:layout_constraintEnd_toStartOf="@+id/btnBottomRight"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@id/bottomGroup"
        tools:text="5"
        tools:textSize="42sp" />

    <TextView
        android:id="@+id/lblBottomLeft"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:layout_constraintBottom_toBottomOf="@id/bottomGroup"
        app:layout_constraintEnd_toEndOf="@id/btnBottomLeft"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="@id/btnBottomLeft"
        app:layout_constraintTop_toBottomOf="@+id/btnBottomLeft"
        tools:text="Button 5" />

    <Button
        android:id="@+id/btnBottomRight"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#999999"
        app:layout_constraintBottom_toTopOf="@+id/lblBottomRight"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/btnBottomLeft"
        app:layout_constraintTop_toTopOf="@+id/bottomGroup"
        tools:text="6"
        tools:textSize="42sp" />

    <TextView
        android:id="@+id/lblBottomRight"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        app:layout_constraintBottom_toBottomOf="@id/bottomGroup"
        app:layout_constraintEnd_toEndOf="@id/btnBottomRight"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="@id/btnBottomRight"
        app:layout_constraintTop_toBottomOf="@+id/btnBottomRight"
        tools:text="Button 6" />

</android.support.constraint.ConstraintLayout>

从具有平面视图层次结构ConstraintLayout

1 个答案: