Android

Question

我想构建这样的布局：

在约束布局中有一个像横幅一样的图像视图，然后是一个与横幅底部边缘居中对齐的卡片，然后是另一个与顶部居中对齐的图像视图卡的边缘。

我面临的问题是第二个图像视图（绿色）在与卡片对齐时进入背景而不是留在前景。

这里是xml,

<android.support.constraint.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:fitsSystemWindows="true"
            app:layout_collapseMode="parallax"
            android:paddingBottom="@dimen/padding_10">

            <ImageView
                android:id="@+id/imageView_jobBackdrop_jobDetails"
                android:layout_width="match_parent"
                android:layout_height="175dp"
                android:fitsSystemWindows="true"
                android:scaleType="centerCrop"
                android:src="@drawable/backdrop_job_details"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_collapseMode="parallax"/>

            <ImageView
                android:id="@+id/imageView_companyLogo_jobDetails"
                android:layout_width="75dp"
                android:layout_height="75dp"
                android:fitsSystemWindows="true"
                app:layout_collapseMode="parallax"
                app:layout_constraintBottom_toTopOf="@+id/cardView_jobHeader_jobDetails"
                app:layout_constraintEnd_toEndOf="@id/cardView_jobHeader_jobDetails"
                app:layout_constraintStart_toStartOf="@id/cardView_jobHeader_jobDetails"
                app:layout_constraintTop_toTopOf="@+id/cardView_jobHeader_jobDetails" />

            <android.support.v7.widget.CardView
                android:id="@+id/cardView_jobHeader_jobDetails"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_marginBottom="24dp"
                android:layout_marginEnd="16dp"
                android:layout_marginStart="16dp"
                app:layout_constraintBottom_toBottomOf="@+id/imageView_jobBackdrop_jobDetails"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/imageView_jobBackdrop_jobDetails"
                app:layout_constraintVertical_bias="0.5">

                <android.support.constraint.ConstraintLayout
                    android:id="@+id/parent"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content">

                    <TextView
                        android:id="@+id/textView_jobTitle_jobDetails"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginEnd="16dp"
                        android:layout_marginStart="16dp"
                        android:layout_marginTop="32dp"
                        android:gravity="center"
                        android:text="Fresher Software Developer Job. Urgent Openning. Angular Js, HTML, JavaScript, CSS"
                        app:layout_constraintEnd_toEndOf="parent"
                        app:layout_constraintStart_toStartOf="parent"
                        app:layout_constraintTop_toTopOf="parent" />

                </android.support.constraint.ConstraintLayout>
            </android.support.v7.widget.CardView>
        </android.support.constraint.ConstraintLayout>

Answer 1

试试这个：

<?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"
    android:orientation="vertical"
    android:padding="20dp">

    <android.support.v7.widget.CardView
        android:id="@+id/card_1"
        android:layout_width="0dp"
        android:layout_height="200dp"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginTop="8dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <android.support.v7.widget.CardView
        android:id="@+id/card_2"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_marginBottom="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginTop="0dp"
        app:cardBackgroundColor="#69F"
        app:layout_constraintBottom_toBottomOf="@+id/card_1"
        app:layout_constraintStart_toStartOf="@+id/card_1"
        app:layout_constraintEnd_toEndOf="@+id/card_1"
        app:layout_constraintTop_toBottomOf="@+id/card_1" />

</android.support.constraint.ConstraintLayout>

说明 :- 由于这四行，此方法有效

以下几行将蓝色 CardView 设置为以白色 CardView 的底部边缘为中心。

<!-- top constraint is set to bottom of White CardView -->
app:layout_constraintTop_toBottomOf="@+id/card_1"

<!-- bottom constraint is set to bottom of White CardView -->
app:layout_constraintBottom_toBottomOf="@+id/card_1"

以下几行设置蓝色 CardView 水平居中

<!-- left/start constraint is set to left/start of White CardView -->
app:layout_constraintStart_toStartOf="@+id/card_1"

<!-- right/end constraint is set to right/end of White CardView -->
app:layout_constraintEnd_toEndOf="@+id/card_1"

Answer 2

尝试以下：

<?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"
    android:fitsSystemWindows="true"
    app:layout_collapseMode="parallax">


    <ImageView
        android:id="@+id/imageView_jobBackdrop_jobDetails"
        android:layout_width="match_parent"
        android:layout_height="175dp"
        android:fitsSystemWindows="true"
        android:scaleType="centerCrop"
        android:background="@android:color/white"
        app:layout_collapseMode="parallax"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:background="@android:color/black"
        app:layout_constraintBottom_toBottomOf="@+id/imageView_jobBackdrop_jobDetails"
        app:layout_constraintEnd_toEndOf="@+id/imageView_jobBackdrop_jobDetails"
        app:layout_constraintStart_toStartOf="@+id/imageView_jobBackdrop_jobDetails"
        app:layout_constraintTop_toBottomOf="@+id/imageView_jobBackdrop_jobDetails"  />

    <ImageView
        android:id="@+id/imageView3"
        android:layout_width="75dp"
        android:layout_height="75dp"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:background="@android:color/darker_gray"
        app:layout_constraintBottom_toTopOf="@+id/imageView2"
        app:layout_constraintEnd_toEndOf="@+id/imageView2"
        app:layout_constraintStart_toStartOf="@+id/imageView2"
        app:layout_constraintTop_toTopOf="@+id/imageView2"  />


</android.support.constraint.ConstraintLayout>

Android - 约束布局 - 如何将视图居中对齐到其他视图的边缘？

Android - Constraint layout - How to align a view centered over edge of other view?

xml

android-layout

android-constraintlayout