android - 通过 ConstraintLayout 在两个维度上使用比率来显示 3 个相同大小的正方形

Question

我想使用 ConstraintLayout 显示 3 个相同尺寸的正方形。正方形的大小必须是屏幕高度的 1/3。我想知道如何使用 ConstraintLayout 来做到这一点。

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>

通过这段代码，我得到了所需的高度，但我想使用 ConstraintLayout Ratio 功能将宽度限制为 1:1

我试过这段代码:

<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>

我该如何修复这些约束并正确显示 3 个相同大小的正方形？如果可能，我只想使用 ConstraintLayout 功能。

谢谢

Answer 1

我将发布带有指南的实现:

<?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>