ConstraintLayout指南下的保证金未正确显示

时间:2017-08-16 19:38:33

标签: android xml android-constraintlayout

我正在尝试在Guideline下为我的约束布局添加一些空格,但由于某种原因,它似乎没有被应用。有谁知道发生了什么以及如何在Guideline下面应用5dp的边距(纵向和横向)?

XML布局

<?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/lightgrey">
    <com.google.android.gms.maps.MapView
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/map_townmap"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#09c"
        app:layout_constraintBottom_toBottomOf="@+id/guideline"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"/>

    <android.support.constraint.Guideline
        android:id="@+id/guideline"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:orientation="horizontal"
        app:layout_constraintGuide_percent="0.9"/>

    <ImageView
        android:id="@+id/imageViewSun"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="5dp"
        android:src="@drawable/ic_sun_black"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toLeftOf="@+id/switch"
        app:layout_constraintTop_toBottomOf="@+id/guideline"
        />

    <Switch
        android:id="@+id/switch"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="5dp"
        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_moon_black"
        android:layout_marginBottom="5dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toRightOf="@+id/switch"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/guideline"/>
</android.support.constraint.ConstraintLayout>

纵向方向

enter image description here

纵向(特写)

enter image description here

横向

enter image description here

横向(特写)

enter image description here

2 个答案:

答案 0 :(得分:2)

您可以将边距应用于Guidlines:

<android.support.constraint.Guideline
    android:id="@+id/guideline"
    android:layout_width="1dp"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    app:layout_constraintGuide_begin="5dp" />

虽然您可能需要相应地调整边距“layout_constraintGuide_begin”和“android:orientation”。可能你应该通过纵向布局xml文件和横向布局xml文件在正确的res文件夹位置执行此操作。

答案 1 :(得分:1)

实际上,您已经添加了Guideline,而您正在使用app:layout_constraintGuide_percent="0.9"。这意味着Guideline将根据父布局进行设置,因此当您更改方向时,它看起来很奇怪。

使用以下代码解决您的问题:

<?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/lightgrey">
    <com.google.android.gms.maps.MapView
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/map_townmap"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#09c"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintBottom_toTopOf="@+id/imageViewSun"
        app:layout_constraintTop_toTopOf="parent"/>

    <ImageView
        android:id="@+id/imageViewSun"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="5dp"
        android:layout_marginTop="5dp"
        android:src="@drawable/ic_sun_black"
        app:layout_constraintTop_toBottomOf="@+id/map_stationmap_lighttheme"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toLeftOf="@+id/switch" />

    <Switch
        android:id="@+id/switch"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginBottom="5dp"
        android:layout_marginTop="5dp"
        app:layout_constraintTop_toBottomOf="@+id/map_stationmap_lighttheme"
        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"/>

    <ImageView
        android:id="@+id/imageViewMoon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_moon_black"
        android:layout_marginBottom="5dp"
        android:layout_marginTop="5dp"
        app:layout_constraintTop_toBottomOf="@+id/map_stationmap_lighttheme"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toRightOf="@+id/switch"
        app:layout_constraintRight_toRightOf="parent"/>
</android.support.constraint.ConstraintLayout>