我用链接、Guideline
和 Barrier
测试了这个 xml
,但它们都无济于事。
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=".RatingActivity">
<TextView
android:id="@+id/welcomeTextView"
android:layout_width="0dp"
android:layout_height="74dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="79dp"
android:gravity="clip_vertical|center_horizontal"
android:text="@string/welcome"
android:textAppearance="@style/TextAppearance.AppCompat.Medium"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="@+id/recyclerView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="0dp"
android:layout_height="467dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="24dp"
android:background="@android:color/darker_gray"
android:padding="4dp"
android:scrollbars="vertical"
app:layout_constraintBottom_toTopOf="@+id/submitButton"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent" />
<Button
android:id="@+id/submitButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:text="@string/submit"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</android.support.constraint.ConstraintLayout>
当它在 AVD
上运行时,RecyclerView
占用的空间比需要的多,导致它覆盖或推回 welcomeTextView
或提交按钮
。
顺便说一句,这是 Gradle
依赖项:
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
最佳答案
尝试:
<?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/welcomeTextView"
android:layout_width="0dp"
android:layout_height="74dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="79dp"
android:gravity="clip_vertical|center_horizontal"
android:text="welcome"
android:textAppearance="@style/TextAppearance.AppCompat.Medium"
android:textStyle="bold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="24dp"
android:background="@android:color/darker_gray"
android:padding="4dp"
android:scrollbars="vertical"
app:layout_constrainedHeight="true"
app:layout_constraintTop_toBottomOf="@+id/welcomeTextView"
app:layout_constraintBottom_toTopOf="@id/submitButton" />
<Button
android:id="@+id/submitButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:text="submit"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</android.support.constraint.ConstraintLayout>
唯一的变化是将 RecyclerView 的顶部设置为文本的底部,然后将 RecyclerView 的高度设置为 0 并设置 app:layout_constrainedHeight="true"
以启用高度计算基于约束。如果欢迎消息底部边距不起作用,请尝试为 RecyclerView 设置顶部边距。
关于android - ConstraintLayout 中的 RecyclerView 显示不正确,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55211279/