将ConstraintLayout中的所有子宽度与最宽子宽度匹配,宽度=包裹内容

当前的1.1稳定版本允许基于屏障和独立背景的复杂解决方案。

    <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">

    <View
        android:id="@+id/background"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#f5aaaa"
        app:layout_constraintBottom_toBottomOf="@+id/button3_txt"
        app:layout_constraintLeft_toLeftOf="@+id/left_barrier"
        app:layout_constraintRight_toRightOf="@+id/right_barrier"
        app:layout_constraintTop_toTopOf="@+id/button1_txt" />

    <TextView
        android:id="@+id/button1_txt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:elevation="8dp"
        android:padding="16dp"
        android:text="small"
        app:layout_constraintBottom_toTopOf="@+id/button2_txt"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_chainStyle="packed" />

    <TextView
        android:id="@+id/button2_txt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:elevation="8dp"
        android:padding="16dp"
        android:text="Bigggggeer"
        app:layout_constraintBottom_toTopOf="@+id/button3_txt"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/button1_txt" />

    <TextView
        android:id="@+id/button3_txt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:elevation="8dp"
        android:padding="16dp"
        android:text="Even Bigggggggggeer"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/button2_txt" />

    <Button
        android:id="@+id/button1"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="@+id/button1_txt"
        app:layout_constraintLeft_toLeftOf="@+id/left_barrier"
        app:layout_constraintRight_toRightOf="@+id/right_barrier"
        app:layout_constraintTop_toTopOf="@+id/button1_txt" />

    <Button
        android:id="@+id/button2"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="@+id/button2_txt"
        app:layout_constraintLeft_toLeftOf="@+id/left_barrier"
        app:layout_constraintRight_toRightOf="@+id/right_barrier"
        app:layout_constraintTop_toTopOf="@+id/button2_txt" />

    <Button
        android:id="@+id/button3"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="@+id/button3_txt"
        app:layout_constraintLeft_toLeftOf="@+id/left_barrier"
        app:layout_constraintRight_toRightOf="@+id/right_barrier"
        app:layout_constraintTop_toTopOf="@+id/button3_txt" />

    <android.support.constraint.Barrier
        android:id="@+id/right_barrier"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:barrierDirection="end"
        app:constraint_referenced_ids="button1_txt, button2_txt, button3_txt" />

    <android.support.constraint.Barrier
        android:id="@+id/left_barrier"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:barrierDirection="start"
        app:constraint_referenced_ids="button1_txt, button2_txt, button3_txt" />

</android.support.constraint.ConstraintLayout>

我们可以将文本与按钮分开,并在每一端设置两个屏障,以跟踪三个文本视图之间最大的文本。
所以现在,按钮只作为背景和单击区域,它们被设置为匹配两个屏障之间的约束。
您可能需要注意与文本相关的高程,因为默认情况下按钮具有高程。 当然,如果您不喜欢按钮的动画立面,请将其更改为视图。
最后,ConstraintLayout具有“链”功能,可以更灵活地模拟LinearLayout的行为。

希望这有帮助!

ConstraintLayout

<?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"
    android:background="#476dce"
    android:padding="16dp">

    <android.support.constraint.ConstraintLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="#f5aaaa"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">


        <Button
            android:id="@+id/button1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Button"
            tools:text="Small" />

        <Button
            android:id="@+id/button2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Button"
            app:layout_constraintTop_toBottomOf="@id/button1"
            tools:text="Bigggggeer" />


        <Button
            android:id="@+id/button3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Button"
            app:layout_constraintTop_toBottomOf="@id/button2"
            tools:text="Even Bigggggggggeer" />

    </android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>