如何在 Constraint Layout 内将两个文本视图居中放置？

Question

我有一个 RecyclerView 的布局（省略了标准内容）：

<androidx.constraintlayout.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
<TextView
    android:id="@+id/id_tv_movie_name"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:layout_constraintEnd_toStartOf="@+id/id_tv_movie_release_year"
    app:layout_constraintStart_toStartOf="parent" />
<TextView
    android:id="@+id/id_tv_movie_release_year"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@+id/id_tv_movie_name" />
</androidx.constraintlayout.ConstraintLayout>

但是当我添加非常长和非常短的标题时，我得到了这个：

彩色线条显示每一行之间的确切距离 startOfParent-startOf1-endOf1-startOf2-endOf2-endOfParent.

如何将此 textView 分成 2 个恒定宽度的列，当标题较大时，将其分成更多行？

类似

  The Lord of The Rings:                        2001
The FellowShip of the Ring
           MIB                                  1997

Answer 1

拆分项目以使每个 TextView 占用恒定宽度的最简单方法是指定 layout_constraintWidth_percent 像这样占宽度的 50%：

app:layout_constraintWidth_percent="0.5"

要将 70% 的宽度分配给标题（居中）并将 30% 的宽度分配给年份 (right-justified)，请执行以下操作：

<androidx.constraintlayout.widget.ConstraintLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <TextView
        android:id="@+id/id_tv_movie_name"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:layout_marginBottom="8dp"
        android:gravity="center"
        android:text="A Very, Very, Very, Very, Very, Very, Very, Very, Very Long Movie Title"
        android:textAppearance="@style/TextAppearance.AppCompat.Body2"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/id_tv_movie_release_year"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintWidth_percent="0.7" />

    <TextView
        android:id="@+id/id_tv_movie_release_year"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginBottom="8dp"
        android:gravity="end"
        android:text="2002"
        android:textAppearance="@style/TextAppearance.AppCompat.Body2"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintWidth_percent="0.3" />
</androidx.constraintlayout.widget.ConstraintLayout>

将显示以下内容：

如果需要的不是 50/50 拆分，则可以使用水平链和布局权重进行相同的布局。

Answer 2

你可以像下面那样做

<?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">

    <TextView
        android:id="@+id/textView3"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="Title asdf asdf asdg asgasdg asdfg"
        android:textAppearance="?android:textAppearanceLarge"
        app:layout_constraintEnd_toStartOf="@+id/text"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintHorizontal_chainStyle="spread"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:layout_editor_absoluteY="66dp" />

    <TextView
        android:id="@+id/text"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="2015"
        android:textAppearance="?android:textAppearanceLarge"
        app:layout_constraintBottom_toBottomOf="@+id/textView3"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/textView3"
        app:layout_constraintTop_toTopOf="@+id/textView3" />

</android.support.constraint.ConstraintLayout>

Answer 3

您可以使用的另一个简单选项是 chains:

 <androidx.constraintlayout.widget.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:text="Button"
        app:layout_constraintEnd_toStartOf="@+id/button2"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintHorizontal_chainStyle="spread"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="8dp"
        android:text="Button"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toEndOf="@+id/button"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

如何在 Constraint Layout 内将两个文本视图居中放置？

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