[英]ListView max height
所以,我的问题是:如果#picture
listView 中有很多元素,则按钮Add image
会离开屏幕。 我只想在它的最低边框处Add image
按钮遇到Next
按钮。 我应该计算header_layout
最大高度还是有另一种方法来解决它?
伪代码如下:
<?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="match_parent">
<include
android:id="@+id/toolbar"
layout="@layout/toolbar"
app:layout_constraintTop_toTopOf="parent" />
<LinearLayout
android:id="@+id/main_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintTop_toBottomOf="@+id/toolbar">
<LinearLayout
android:id="@+id/header_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/blue"
android:orientation="vertical">
<LinearLayout
... ID
</LinearLayout>
<LinearLayout
... Owner
</LinearLayout>
<LinearLayout
...Date
</LinearLayout>
<LinearLayout
android:id="@+id/layout_image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/textview_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#pictures"
android:textStyle="bold" />
<ListView
android:id="@+id/listview_images"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</LinearLayout>
<Button
android:id="@+id/button_add_picture"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:text="Add image"/>
</LinearLayout>
<Button
android:id="@+id/button_next"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Next"
app:layout_constraintBottom_toBottomOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
并查看:截图
将 android:layout_weight="1" 添加到您的 #header_layout
好吧,在这种情况下,实际上不可能完全依赖 ConstrainLayout。 你可以这样做:
<?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:orientation="vertical">
<include
android:id="@+id/toolbar"
layout="@layout/toolbar"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<LinearLayout
android:id="@+id/main_layout"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_above="@id/button_next"
android:layout_below="@id/toolbar"
android:layout_marginBottom="8dp"
android:orientation="vertical"
app:layout_constraintBottom_toTopOf="@+id/button_next"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/toolbar">
<LinearLayout
android:id="@+id/header_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:background="@android:color/holo_blue_light"
android:orientation="vertical">
<TextView
android:id="@+id/textview_id"
android:layout_width="wrap_content"
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:text="ID:"
android:textStyle="bold" />
<TextView
android:id="@+id/textview_owner"
android:layout_width="wrap_content"
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:text="Owner:"
android:textStyle="bold" />
<TextView
android:id="@+id/textview_date"
android:layout_width="wrap_content"
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:text="Date: 03/11/2020 11:40"
android:textStyle="bold" />
<TextView
android:id="@+id/textview_image"
android:layout_width="wrap_content"
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:text="#pictures"
android:textStyle="bold" />
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/listview_images"
android:layout_width="match_parent"
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:overScrollMode="never"
android:scrollbars="none" />
</LinearLayout>
<Button
android:id="@+id/button_add_picture"
android:layout_width="match_parent"
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:text="Add image" />
</LinearLayout>
</LinearLayout>
<Button
android:id="@+id/button_next"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginBottom="8dp"
android:text="Next"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
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