我有一个RecyclerView的布局(省略标准的东西):
<androidx.constraintlayout.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
<TextView
android:id="@+id/id_tv_movie_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintEnd_toStartOf="@+id/id_tv_movie_release_year"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="@+id/id_tv_movie_release_year"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/id_tv_movie_name" />
</androidx.constraintlayout.ConstraintLayout>
但是当我添加很长很短的标题时,我得到了这个:
彩色线条显示每一行都有startOfParent-startOf1-endOf1-startOf2-endOf2-endOfParent
之间的确切距离。
如何将textViews分成2个恒定宽度的列,当title更大时,将其分成更多行?
就像是
The Lord of The Rings: 2001
The FellowShip of the Ring
MIB 1997
你可以在下面这样做
<?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/textView3"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Title asdf asdf asdg asgasdg asdfg"
android:textAppearance="?android:textAppearanceLarge"
app:layout_constraintEnd_toStartOf="@+id/text"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintHorizontal_chainStyle="spread"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:layout_editor_absoluteY="66dp" />
<TextView
android:id="@+id/text"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="center"
android:text="2015"
android:textAppearance="?android:textAppearanceLarge"
app:layout_constraintBottom_toBottomOf="@+id/textView3"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/textView3"
app:layout_constraintTop_toTopOf="@+id/textView3" />
</android.support.constraint.ConstraintLayout>
分割项目以使每个TextView
消耗恒定宽度的最简单方法是指定layout_constraintWidth_percent
这样的宽度的50%:
app:layout_constraintWidth_percent="0.5"
要将70%的宽度分配给标题(居中)和30%分配到年份(右对齐),请执行以下操作:
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/id_tv_movie_name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:gravity="center"
android:text="A Very, Very, Very, Very, Very, Very, Very, Very, Very Long Movie Title"
android:textAppearance="@style/TextAppearance.AppCompat.Body2"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="@+id/id_tv_movie_release_year"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintWidth_percent="0.7" />
<TextView
android:id="@+id/id_tv_movie_release_year"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:gravity="end"
android:text="2002"
android:textAppearance="@style/TextAppearance.AppCompat.Body2"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintWidth_percent="0.3" />
</androidx.constraintlayout.widget.ConstraintLayout>
这将显示以下内容:
如果需要50/50以外的分割,则可以使用水平链和布局权重进行相同的布局。
您可以使用的另一个简单选项是chains:
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Button"
app:layout_constraintEnd_toStartOf="@+id/button2"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintHorizontal_chainStyle="spread"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Button"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="@+id/button"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>