如何优先考虑 TextView 截断

Question

我有两个横向约束在一起的长文本。由于两个文本都可能很长，因此都用省略号截断。这是供参考的图表。

| [文本视图 1] [文本视图 2] |

假设我们为TextViews 显示相同的长文本："Hello there I am a very very long text"。我需要做的是，如果没有足够的空间容纳TextViews，那么先截断右边的TextView，然后再截断左边的TextView。

这是我想要的结果：

| [Hello there I am a very very long text] [Hello...] |

这是我迄今为止尝试过的：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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="wrap_content"
android:layout_marginTop="56dp"
android:padding="20dp">

<TextView
    android:id="@+id/leftTv"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:ellipsize="end"
    android:maxLines="1"
    android:textColor="#333333"
    android:textSize="18sp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toStartOf="@+id/rightTv"
    app:layout_constraintHorizontal_bias="0.0"
    app:layout_constraintHorizontal_chainStyle="packed"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    android:text="Hello there I am a very very very very long text"
    tools:text="Hello there I am a very very very very long text" />

<TextView
    android:id="@+id/rightTv"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginStart="16dp"
    android:layout_marginLeft="16dp"
    android:textColor="#21b38a"
    android:textSize="16sp"
    android:ellipsize="end"
    android:maxLines="1"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@+id/leftTv"
    app:layout_constraintTop_toTopOf="parent"
    android:text="Hello there I am a very very very very long text"
    tools:text="Hello there I am a very very very very long text" />

</androidx.constraintlayout.widget.ConstraintLayout>

我的代码输出如下：

| [Hello there I am a very..] [Hello there I am a very..] |

这是我在发布之前检查过的一些帖子。

ConstraintLayout prioritizing textview truncation

Expand TextView with wrap_content until the neighbor view reaches the end of the parent

Answer 1

对于左侧TextView，指定app:layout_constrainedWidth="true"，宽度为wrap_content。对于右边的 TextView，指定app:layout_constraintWidth_min="50dp" 和wrap_content 的宽度。 （如果不指定最小宽度，当左视图足够大时，视图会缩小到零。）

<androidx.constraintlayout.widget.ConstraintLayout 
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:padding="16dp">

    <TextView
        android:id="@+id/leftTv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ellipsize="end"
        android:maxLines="1"
        android:text="Hello this is some very, very, very, very, very, very, very, very, very long text."
        app:layout_constrainedWidth="true"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@+id/rightTv"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintHorizontal_chainStyle="packed"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/rightTv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ellipsize="end"
        android:maxLines="1"
        android:text="Hello this is some very, very, very, very, very, very long text."
        app:layout_constrainedWidth="true"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/leftTv"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintWidth_min="50dp" />

</androidx.constraintlayout.widget.ConstraintLayout>