如何在ConstraintLayout中设置布局权重

Question

我有 4 个视图，我需要将它们分成 2 个一组，然后将它们覆盖在该区域中。

我尝试过使用 Group & chainStyle 但没有什么能满足 100%。

我要，

我成功做到了，

下面给出了相同的代码，

<?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="wrap_content"
android:background="@color/colorBtnPink"
android:paddingTop="@dimen/_10sdp"
android:padding="@dimen/_10sdp">

<ImageView
    android:id="@+id/ivFb"
    android:layout_width="@dimen/_40sdp"
    android:layout_height="@dimen/_40sdp"
    android:background="@color/colorBgBtnFbDark"
    android:clickable="false"
    android:padding="@dimen/_10sdp"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/ic_facebook"
    tools:ignore="ContentDescription" />

<TextView
    android:id="@+id/tvFacebook"
    style="@style/tvSmallPopMedium"
    android:layout_width="0dp"
    android:layout_height="@dimen/_40sdp"
    android:background="@color/colorBgBtnFacebook"
    android:clickable="false"
    android:gravity="center"
    android:paddingBottom="@dimen/padding_regular"
    android:paddingTop="@dimen/padding_regular"
    android:text="@string/action_facebook"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toRightOf="@+id/ivFb"
    app:layout_constraintTop_toTopOf="parent" />


<ImageView
    android:id="@+id/ivTwitter"
    android:layout_width="@dimen/_40sdp"
    android:layout_height="@dimen/_40sdp"
    android:background="@color/colorBgBtnTwDark"
    android:clickable="false"
    android:padding="@dimen/_10sdp"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toRightOf="@+id/tvFacebook"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/ic_twitter"
    tools:ignore="ContentDescription" />

<TextView
    android:id="@+id/tvTwitter"
    style="@style/tvSmallPopMedium"
    android:layout_width="0dp"
    android:layout_height="@dimen/_40sdp"
    android:background="@color/colorBgBtnTwitter"
    android:clickable="false"
    android:gravity="center"
    android:paddingBottom="@dimen/padding_regular"
    android:paddingTop="@dimen/padding_regular"
    android:text="@string/action_twitter"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toRightOf="@+id/ivTwitter"
    app:layout_constraintTop_toTopOf="parent" />
 </android.support.constraint.ConstraintLayout>

Answer 1

你也可以使用 guideLines 属性这样的东西：

<?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="wrap_content"
android:background="@color/colorBtnPink"
android:padding="@dimen/_10sdp"
android:paddingTop="@dimen/_10sdp">

<ImageView
    android:id="@+id/ivFb"
    android:layout_width="@dimen/_40sdp"
    android:layout_height="@dimen/_40sdp"
    android:background="@color/colorBgBtnFbDark"
    android:clickable="false"
    android:padding="@dimen/_10sdp"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/ic_facebook"
    tools:ignore="ContentDescription" />

<TextView
    android:id="@+id/tvFacebook"
    style="@style/tvSmallPopMedium"
    android:layout_width="0dp"
    android:layout_height="@dimen/_40sdp"
    android:background="@color/colorBgBtnFacebook"
    android:clickable="false"
    android:gravity="center"
    android:paddingBottom="@dimen/padding_regular"
    android:paddingTop="@dimen/padding_regular"
    android:text="@string/action_facebook"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toRightOf="@+id/ivFb"
    app:layout_constraintRight_toLeftOf="@id/ivTwitter"
    app:layout_constraintTop_toTopOf="parent" />


<android.support.constraint.Guideline
    android:id="@+id/guideline2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    app:layout_constraintGuide_percent="0.5" />


<ImageView
    android:id="@+id/ivTwitter"
    android:layout_width="@dimen/_40sdp"
    android:layout_height="@dimen/_40sdp"
    android:layout_marginLeft="8dp"
    android:layout_marginStart="8dp"
    android:background="@color/colorBgBtnTwDark"
    android:clickable="false"
    android:padding="@dimen/_10sdp"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toRightOf="@+id/tvFacebook"
    app:layout_constraintStart_toStartOf="@+id/guideline2"
    app:layout_constraintTop_toTopOf="parent"
    app:srcCompat="@drawable/ic_twitter"
    tools:ignore="ContentDescription" />

<TextView
    android:id="@+id/tvTwitter"
    style="@style/tvSmallPopMedium"
    android:layout_width="0dp"
    android:layout_height="@dimen/_40sdp"
    android:background="@color/colorBgBtnTwitter"
    android:clickable="false"
    android:gravity="center"
    android:paddingBottom="@dimen/padding_regular"
    android:paddingTop="@dimen/padding_regular"
    android:text="@string/action_twitter"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toRightOf="@+id/ivTwitter"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

看看这是否满足您的要求。

Answer 2

解决方法如下：

<?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_marginTop="8dp"
    android:layout_height="wrap_content">
<RelativeLayout
    android:id="@+id/button_savewd"
    android:layout_width="0dp"
    android:layout_height="50dp"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="4dp"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:background="#3b5998"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintHorizontal_chainStyle="spread"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toLeftOf="@+id/asdfsff"
    tools:ignore="RtlCompat">
    <ImageView
        android:id="@+id/button_save"
        android:layout_width="50dp"
        android:layout_height="wrap_content"
        android:text="Facebook"
        tools:ignore="ContentDescription" />
    <Button
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_toEndOf="@+id/button_save"
        android:layout_toRightOf="@+id/button_save"
        android:background="@color/white"
        android:text="facebook"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toRightOf="@+id/button_save"
        app:layout_constraintRight_toRightOf="parent" />
</RelativeLayout>
<RelativeLayout
    android:id="@+id/asdfsff"
    android:layout_width="0dp"
    android:layout_height="50dp"
    android:layout_marginBottom="8dp"
    android:layout_marginEnd="8dp"
    android:layout_marginTop="8dp"
    android:layout_marginStart="4dp"
    android:background="#444"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toRightOf="@+id/button_savewd"
    app:layout_constraintRight_toRightOf="parent"
    tools:ignore="RtlCompat">
    <ImageView
        android:id="@+id/img_twitter"
        android:layout_width="50dp"
        android:layout_height="wrap_content"
        android:padding="10dp"
        android:src="@drawable/logo_0"
        android:text="Facebook"
        tools:ignore="ContentDescription" />
    <Button
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_toEndOf="@+id/img_twitter"
        android:layout_toRightOf="@+id/img_twitter"
        android:text="Twitter"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toRightOf="@+id/img_twitter"
        app:layout_constraintRight_toRightOf="parent" />
     </RelativeLayout>
 </android.support.constraint.ConstraintLayout>

setting the width of each item to 0dp or MATCH_CONSTRAINT lets the views fill the parent (optional)

输出：

Answer 3

你应该修改你的代码如下

<?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="wrap_content">

<ImageView
   android:id="@+id/ivFb"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_marginStart="32dp"
   android:clickable="false"
   app:layout_constraintBottom_toBottomOf="parent"
   app:layout_constraintEnd_toStartOf="@+id/tvFacebook"
   app:layout_constraintHorizontal_bias="0.0"
   app:layout_constraintHorizontal_chainStyle="spread"
   app:layout_constraintStart_toStartOf="parent"
   app:layout_constraintTop_toTopOf="parent"
   app:srcCompat="@drawable/ic_android_black_24dp"
   tools:ignore="ContentDescription" />

<TextView
   android:id="@+id/tvFacebook"
   android:layout_width="0dp"
   android:layout_height="wrap_content"
   android:layout_marginEnd="16dp"
   android:clickable="false"
   android:gravity="center"
   android:text="Facebook"
   app:layout_constraintBottom_toBottomOf="@+id/ivFb"
   app:layout_constraintEnd_toStartOf="@+id/ivTwitter"
   app:layout_constraintHorizontal_bias="0.5"
   app:layout_constraintHorizontal_chainStyle="spread"
   app:layout_constraintStart_toEndOf="@+id/ivFb"
   app:layout_constraintTop_toTopOf="parent" />


<ImageView
   android:id="@+id/ivTwitter"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_marginStart="16dp"
   android:clickable="false"
   app:layout_constraintBottom_toBottomOf="parent"
   app:layout_constraintEnd_toStartOf="@+id/tvTwitter"
   app:layout_constraintHorizontal_bias="0.5"
   app:layout_constraintHorizontal_chainStyle="spread"
   app:layout_constraintStart_toEndOf="@+id/tvFacebook"
   app:layout_constraintTop_toTopOf="parent"
   app:srcCompat="@drawable/ic_android_black_24dp"
   tools:ignore="ContentDescription" />

 <TextView
   android:id="@+id/tvTwitter"
   android:layout_width="0dp"
   android:layout_height="wrap_content"
   android:layout_marginEnd="32dp"
   android:clickable="false"
   android:gravity="center"
   android:text="Twitter"
   app:layout_constraintBottom_toBottomOf="@+id/ivTwitter"
   app:layout_constraintEnd_toEndOf="parent"
   app:layout_constraintHorizontal_bias="0.5"
   app:layout_constraintHorizontal_chainStyle="spread"
   app:layout_constraintStart_toEndOf="@+id/ivTwitter"
   app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

看起来像

我修改了你在约束布局中排列元素的代码，现在你可以根据需要修改代码:)

Answer 4

应用以下步骤：

Select 您的小部件并将链设置为水平
Select 您的小部件并将其设置为水平居中
Select 您的小部件并将其设置为组织（水平展开）。

Answer 5

很简单，要使用 chainStyle，您必须给定开始和结束约束（如果 chainStyle=horizontal），而 chainStyle=vertical 的顶部和底部约束

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