我正在学习如何使用
ConstraintLayout
。我想制作一个包含4个元素的菜单。
元素应该居中于父容器
元素应该是父容器高度的1:5大小比例(1:1比例-正方形)
<?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.support.constraint.Guideline
android:id="@+id/split"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.6" />
<android.support.constraint.ConstraintLayout
android:id="@+id/tiles_container"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorPrimary"
app:layout_constraintBottom_toTopOf="@+id/split"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0">
<android.support.constraint.Guideline
android:id="@+id/container_v"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.5" />
<android.support.constraint.Guideline
android:id="@+id/container_h"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.5" />
<ImageView
android:id="@+id/tile_1"
android:layout_width="@dimen/tile_size"
android:layout_height="@dimen/tile_size"
android:layout_marginBottom="@dimen/tile_margin"
android:layout_marginEnd="@dimen/tile_margin"
app:layout_constraintBottom_toTopOf="@+id/container_v"
app:layout_constraintEnd_toStartOf="@+id/container_h"
app:srcCompat="@mipmap/ic_launcher" />
<ImageView
android:id="@+id/tile_2"
android:layout_width="@dimen/tile_size"
android:layout_height="@dimen/tile_size"
android:layout_marginBottom="@dimen/tile_margin"
android:layout_marginStart="@dimen/tile_margin"
app:layout_constraintBottom_toTopOf="@+id/container_v"
app:layout_constraintStart_toStartOf="@+id/container_h"
app:srcCompat="@mipmap/ic_launcher" />
<ImageView
android:id="@+id/tile_3"
android:layout_width="@dimen/tile_size"
android:layout_height="@dimen/tile_size"
android:layout_marginTop="@dimen/tile_margin"
android:layout_marginEnd="@dimen/tile_margin"
app:layout_constraintEnd_toStartOf="@+id/container_h"
app:layout_constraintTop_toTopOf="@+id/container_v"
app:srcCompat="@mipmap/ic_launcher" />
<ImageView
android:id="@+id/tile_4"
android:layout_width="@dimen/tile_size"
android:layout_height="@dimen/tile_size"
android:layout_marginTop="@dimen/tile_margin"
android:layout_marginStart="@dimen/tile_margin"
app:layout_constraintStart_toStartOf="@+id/container_h"
app:layout_constraintTop_toTopOf="@+id/container_v"
app:srcCompat="@mipmap/ic_launcher" />
</android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>
很遗憾,我不得不硬编码图像的宽度和高度。是否可能根据父元素的比例设置子元素的大小(就像在Xcode中一样)?