Constraintlayout，视图被推到了界外

Question

我需要实现以下布局：

标题为“天堂中的麻烦”应该能够在高度上扩展，但它不应该将'Ma 21januari'推到极限之外。

这是我目前的布局：

<androidx.constraintlayout.widget.ConstraintLayout
      android:id="@+id/wrapper_titles"
      android:layout_width="0dp"
      android:layout_height="0dp"
      app:layout_constraintBottom_toBottomOf="@id/image_episode"
      app:layout_constraintEnd_toEndOf="parent"
      app:layout_constraintStart_toEndOf="@id/image_episode"
      app:layout_constraintTop_toTopOf="@id/image_episode"
      >

    <TextView
        android:id="@+id/subtitle_episode"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="bottom"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintBottom_toTopOf="@+id/title_episode"
        tools:text="Ma 21 januari"
        style="@style/Text_Episode_Subtitle"
        />

    <TextView
        android:id="@+id/title_episode"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:ellipsize="end"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        tools:text="Trouble in paradise"
        style="@style/Text_Episode_Title"
        />

  </androidx.constraintlayout.widget.ConstraintLayout>

如何将title_episode扩展到完整高度但是subtitle_episode仍然固定在顶部？

Answer 1

我认为最干净的解决方案是将两个TextViews放在一个包装的垂直链中，偏置设置为1，以便它们粘在底部。这意味着您需要为这些top添加TextViews约束，这也有助于防止它们被推到外面。由于title_episode's高度设置为wrap_content，因此设置app:layout_constrainedHeight="true"属性以在其扩展时强制执行其约束也很重要。

<androidx.constraintlayout.widget.ConstraintLayout
    android:id="@+id/wrapper_titles"
    android:layout_width="0dp"
    android:layout_height="0dp"
    app:layout_constraintBottom_toBottomOf="@id/image_episode"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@id/image_episode"
    app:layout_constraintTop_toTopOf="@id/image_episode"
    >

    <TextView
        android:id="@+id/subtitle_episode"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:gravity="bottom"
        app:layout_constraintVertical_chainStyle="packed"
        app:layout_constraintVertical_bias="1"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintBottom_toTopOf="@id/title_episode"
        app:layout_constraintTop_toTopOf="parent"
        tools:text="Ma 21 januari"
        style="@style/Text_Episode_Subtitle"
        />

    <TextView
        android:id="@+id/title_episode"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:ellipsize="end"
        app:layout_constrainedHeight="true"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/subtitle_episode"
        tools:text="Trouble in paradise"
        style="@style/Text_Episode_Title"
        />

</androidx.constraintlayout.widget.ConstraintLayout>

Answer 2

我提供了满足您要求的基本结构，可根据您的需要进行定制：

<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="wrap_content">

    <ImageView
        android:id="@+id/image_thumbnail"
        android:layout_width="180dp"
        android:layout_height="150dp"
        android:scaleType="fitXY"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:src="@tools:sample/avatars" />

    <TextView
        android:id="@+id/subtitle_episode"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="30dp"
        android:layout_marginEnd="15dp"
        android:textSize="20sp"
        app:layout_constraintBottom_toBottomOf="@+id/image_thumbnail"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/image_thumbnail"
        app:layout_constraintTop_toTopOf="@+id/image_thumbnail"
        tools:text="Ma 21 januari" />

    <TextView
        android:id="@+id/title_episode"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="30dp"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="15dp"
        android:textColor="@android:color/black"
        android:textSize="30sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@+id/image_thumbnail"
        app:layout_constraintTop_toBottomOf="@+id/subtitle_episode"
        tools:text="Trouble in paradise Trouble in paradise Trouble in paradise" />

</android.support.constraint.ConstraintLayout>

Answer 3

在这里，看看：

<android.support.constraint.ConstraintLayout
    android:layout_width="0dp"
    android:layout_height="0dp"
    app:layout_constraintBottom_toBottomOf="@+id/image_episode"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toEndOf="@id/image_episode"
    app:layout_constraintTop_toTopOf="@id/image_episode">

    <TextView
        android:id="@+id/subtitle_episode"
        style="@style/Text_Episode_Subtitle"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:text="Ma 21 januari" />

    <TextView
        android:id="@+id/title_episode"
        style="@style/Text_Episode_Title"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:ellipsize="end"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/subtitle_episode"
        tools:text="Trouble in paradise Trouble in paradise" />

</android.support.constraint.ConstraintLayout>