我正在尝试创建一个包含复杂布局的ConstraintLayout,但出于某种原因,它不会以预期的方式出现。有谁知道必须做些什么来修复约束并达到预期的结果?
XML布局代码
<?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="wrap_content"
android:orientation="vertical"
android:background="@color/lightgrey"
android:weightSum="100">
<com.google.android.gms.maps.MapView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mymap"
android:name="com.google.android.gms.maps.SupportMapFragment"
app:layout_constraintBottom_toTopOf="parent"
app:layout_constraintRight_toRightOf="parent"
tools:layout_constraintLeft_creator="1"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:layout_width="41dp"
android:layout_height="0dp"
tools:layout_editor_absoluteY="0dp"
tools:layout_editor_absoluteX="8dp" />
<android.support.constraint.Guideline
android:id="@+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.9"/>
<ImageView
android:id="@+id/imageViewSun"
android:importantForAccessibility="no"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_sun_black"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintBottom_toBottomOf="guideline"
app:layout_constraintRight_toLeftOf="@+id/switch_stationstopmap_lighttheme"
app:layout_constraintHorizontal_bias="0.5"
android:layout_marginEnd="8dp"
android:layout_marginBottom="0dp" />
<Switch
android:id="@+id/switch_stationstopmap_lighttheme"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintBottom_toTopOf="@+id/guideline"
app:layout_constraintHorizontal_bias="0.5"
android:background="@android:color/transparent"
android:theme="@android:style/Theme.Material.Light" />
<ImageView
android:id="@+id/imageViewMoon"
android:importantForAccessibility="no"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_moon_black"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintHorizontal_bias="0.508"
app:layout_constraintLeft_toRightOf="@+id/switch_stationstopmap_lighttheme"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintBottom_toTopOf="@+id/guideline"
android:layout_marginBottom="5dp" />
</android.support.constraint.ConstraintLayout>
预期结果
当前结果
所需要求
MapView
高度需要为布局高度的90%Switch
需要完全位于屏幕的水平中心ImageView
需要正好位于屏幕左侧与开关之间的水平位置ImageView
需要在开关和屏幕右侧之间正好位于水平中间答案 0 :(得分:1)
你可以试试这个。我将根布局高度更改为android:layout_height="match_parent"
,然后解决了大部分问题。
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/colorAccent">
<com.google.android.gms.maps.MapView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mymap"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="0dp"
android:layout_height="0dp"
android:background="#f00"
app:layout_constraintBottom_toBottomOf="@+id/guideline"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<ImageView
android:id="@+id/imageViewSun"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_action_name"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/switch_stationstopmap_lighttheme"
app:layout_constraintTop_toBottomOf="@+id/guideline"
/>
<Switch
android:id="@+id/switch_stationstopmap_lighttheme"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:background="@android:color/transparent"
android:theme="@android:style/Theme.Material.Light"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toRightOf="@+id/imageViewSun"
app:layout_constraintRight_toLeftOf="@+id/imageViewMoon"
app:layout_constraintTop_toBottomOf="@+id/guideline"/>
<ImageView
android:id="@+id/imageViewMoon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_action_name"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toRightOf="@+id/switch_stationstopmap_lighttheme"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/guideline"/>
<android.support.constraint.Guideline
android:id="@+id/guideline"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.9"/>
</android.support.constraint.ConstraintLayout>