我想显示一个带有标题(页眉),正文(内容)和接受按钮(页脚)的对话框。我希望即使内容长于屏幕高度,页眉和页脚也可见。如果是这种情况,我希望身体可以滚动以便可以收缩。这是我尝试过的,scrollView获取所有对话框空间,不显示页眉和页脚:
<?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"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fillViewport="true"
android:minWidth="300dp">
<TextView
android:id="@+id/title"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="@android:color/darker_gray"
android:text="Title"
app:layout_constraintBottom_toTopOf="@+id/bodyContainer"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ScrollView
android:id="@+id/bodyContainer"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintBottom_toTopOf="@+id/buttonContainer"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/title">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/text"
android:layout_width="match_parent"
android:layout_height="1500dp"
android:text="Long text" />
</LinearLayout>
</ScrollView>
<LinearLayout
android:id="@+id/buttonContainer"
android:layout_width="0dp"
android:layout_height="30dp"
android:background="@android:color/darker_gray"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/bodyContainer" />
</androidx.constraintlayout.widget.ConstraintLayout>
答案 0 :(得分:0)
将ScrollView's
的高度设置为wrap_content
时,如果约束尺寸太大而无法满足要求,则约束不会限制尺寸。要解决此问题并施加最高和最低约束,请为app:layout_constrainedHeight="true"
设置ScrollView
。
答案 1 :(得分:0)
这正是您想要的。使用NestedScrollView而不是ScrollView:
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:minWidth="300dp">
<TextView
android:id="@+id/title"
android:layout_width="411dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:background="@android:color/darker_gray"
android:text="Title"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<androidx.core.widget.NestedScrollView
android:id="@+id/bodyContainer"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/title"
app:layout_constraintBottom_toTopOf="@+id/button">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/text"
android:layout_width="match_parent"
android:layout_height="1500dp"
android:text="Long text" />
</LinearLayout>
</androidx.core.widget.NestedScrollView>
<Button
android:id="@+id/button"
android:layout_width="411dp"
android:layout_height="30dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:background="@android:color/darker_gray"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="1.0" />
</androidx.constraintlayout.widget.ConstraintLayout>