使用ConstraintLayout在两个维度上使用比率来显示相同​​大小的3个正方形

时间：2017-04-01 12:24:23

标签： android android-layout android-constraintlayout

我想使用ConstraintLayout显示3个相同尺寸的正方形。方块的大小必须是屏幕高度的1/3。我想知道如何使用ConstraintLayout。

我从这段代码开始：

<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">

    <View
        android:id="@+id/view1"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toTopOf="@+id/view2"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintVertical_chainStyle="spread"
        android:background="#ff0000" />

    <View
        android:id="@+id/view2"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        app:layout_constraintTop_toBottomOf="@id/view1"
        app:layout_constraintBottom_toTopOf="@+id/view3"
        app:layout_constraintLeft_toLeftOf="parent"
        android:background="#00ff00" />

    <View
        android:id="@+id/view3"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        app:layout_constraintTop_toBottomOf="@id/view2"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        android:background="#0000ff" />


</android.support.constraint.ConstraintLayout>

使用此代码我得到了所需的高度，但我想使用ConstraintLayout Ratio功能将宽度约束为1：1

我尝试使用此代码：

<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">

    <View
        android:id="@+id/view1"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toTopOf="@+id/view2"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintVertical_chainStyle="spread"
        app:layout_constraintDimensionRatio="W,1:1"
        android:background="#ff0000" />

    <View
        android:id="@+id/view2"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintTop_toBottomOf="@id/view1"
        app:layout_constraintBottom_toTopOf="@+id/view3"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintDimensionRatio="W,1:1"
        android:background="#00ff00" />

    <View
        android:id="@+id/view3"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintTop_toBottomOf="@id/view2"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintDimensionRatio="W,1:1"
        android:background="#0000ff" />

</android.support.constraint.ConstraintLayout>

如何修复这些约束并正确显示3个相同大小的方块？我只想尽可能使用ConstraintLayout功能。

由于

2 个答案:

答案 0 :(得分：3)

我将发布一个带有指南的实现：

<?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"
        tools:layout_editor_absoluteY="81dp"
        tools:layout_editor_absoluteX="0dp">

    <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline1"
            android:orientation="horizontal"
            app:layout_constraintGuide_percent="0.33"/>

    <android.support.constraint.Guideline
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/guideline2"
            android:orientation="horizontal"
            app:layout_constraintGuide_percent="0.66"/>

    <TextView
            android:id="@+id/view1"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:background="#ff0000"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.5"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintBottom_toTopOf="@+id/guideline1"
            android:layout_marginBottom="0dp"
            android:layout_marginLeft="0dp"
            app:layout_constraintDimensionRatio="1:1"/>

    <TextView
            android:id="@+id/view2"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:background="#00ff00"
            app:layout_constraintTop_toBottomOf="@id/guideline1"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintHorizontal_weight="1"
            app:layout_constraintVertical_bias="0.5"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintBottom_toTopOf="@id/guideline2"
            app:layout_constraintDimensionRatio="1:1"/>

    <TextView
            android:id="@+id/view3"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:background="#0000ff"
            app:layout_constraintTop_toBottomOf="@id/guideline2"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintHorizontal_weight="1"
            app:layout_constraintVertical_bias="0.5"
            app:layout_constraintHorizontal_bias="0.5"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintDimensionRatio="1:1"/>


</android.support.constraint.ConstraintLayout>

Portrait

Landscape

答案 1 :(得分：2)

将View2和View3的水平边距与View1对齐而不是Parent：

<View
    android:id="@+id/view1"
    android:background="#ff0000"
    android:layout_height="0dp"
    android:layout_width="0dp"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toTopOf="@+id/view2"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintDimensionRatio="1:1"
    app:layout_constraintVertical_chainStyle="spread"
    app:layout_constraintHorizontal_chainStyle="spread"/>

<View
    android:id="@+id/view2"
    android:background="#00ff00"
    android:layout_height="0dp"
    android:layout_width="0dp"
    app:layout_constraintTop_toBottomOf="@id/view1"
    app:layout_constraintBottom_toTopOf="@id/view3"
    app:layout_constraintLeft_toLeftOf="@id/view1"
    app:layout_constraintRight_toRightOf="@id/view1"
    app:layout_constraintDimensionRatio="1:1"/>

<View
    android:id="@+id/view3"
    android:background="#0000ff"
    android:layout_height="0dp"
    android:layout_width="0dp"
    app:layout_constraintTop_toBottomOf="@id/view2"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toLeftOf="@id/view1"
    app:layout_constraintRight_toRightOf="@id/view1"
    app:layout_constraintDimensionRatio="1:1"/>

请注意，View2和View3的layout_constraintLeft_toLeftOf和layout_constraintRight_toRightOf设置为@id/view1而不是parent。

enter image description here

（我添加了layout_constraintHorizontal_chainStyle="spread"以允许链水平居中。您可以更改View1的水平约束，以决定是否对齐左侧，中间或右侧。）

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