垂直拉伸ImageView约束布局

Question

在使ImageView垂直填充剩余的间隙时，我遇到了一个小问题。我在屏幕截图上以红色突出显示了它。有人可以看看并提供建议吗？

https://i.stack.imgur.com/PBio1.png

这是关联的XML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"
    tools:context="com.example.android.happybirthday.MainActivity">

<ImageView
    android:id="@+id/imageView"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:adjustViewBounds="true"
    android:contentDescription="@string/happy_birthday_toyou"
    android:scaleType="centerCrop"
    android:src="@drawable/invite"
    app:layout_constraintBottom_toTopOf="@+id/textViewBottom"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/textViewTop" />

<TextView
    android:id="@+id/textViewTop"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:padding="8dp"
    android:fontFamily="sans-serif"
    android:text="@string/happy_birthday_toyou"
    android:textColor="@color/colorWhite"
    android:background="@color/colorBlack"
    android:textSize="@dimen/text_size"
    android:gravity="start"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintStart_toStartOf="parent"
   />

<TextView
    android:id="@+id/textViewBottom"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:background="@color/colorBlack"
    android:fontFamily="sans-serif"
    android:gravity="end"
    android:padding="8dp"
    android:text="@string/from_me"
    android:textColor="@color/colorWhite"
    android:textSize="@dimen/text_size"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    />



</android.support.constraint.ConstraintLayout>

Answer 1

尝试将imageView中的“ android：layout_height =“ wrap_content”更改为0dp