How to include constraint layout to another constraint layout and set constraint between each(如何将约束布局包含到另一个约束布局并在每个约束布局之间设置约束)

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问题描述

I'm using constraintLyout v 1.0.1.

I would like to include in my xml a sub ConstraintLayout corresponding to a part of my global layout (which itself is a ConstraintLayout). I split the layout in two xmls in order to use this sub part elsewhere

I tried this but I have no control on where to place my sub constraint layout in the parent. I wonder if I have to place everything in the same xml file or if their is a solution to use separate files.

tmp_1.xml

<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
    <TextView
        android:id="@+id/label"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="LABEL1"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="16dp"
        />
    <TextView
        android:id="@+id/label_2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="LABEL2"
        app:layout_constraintStart_toStartOf="@id/label"
        app:layout_constraintEnd_toEndOf="@id/label"
        app:layout_constraintTop_toBottomOf="@id/label"
        android:layout_marginTop="16dp"
        />

    <include layout="@layout/tmp_2" />
</android.support.constraint.ConstraintLayout>

tmp_2.xml

<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    >
    <TextView
        android:id="@+id/view_80"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="80th element"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="10dp"
        android:layout_marginStart="12dp"
        />
</android.support.constraint.ConstraintLayout>

The result is this

But i want it to be this

I tried this but it does not work

<include 
    app:layout_constraintTop_toBottomOf="@id/label_2"
    layout="@layout/tmp_2" />

解决方案

Actually found a solution. Android Studio does not autocomplete constraintLayout parameters in an include tag but they do have an impact on it as long as you give that include a size.

<include
        layout="@layout/tmp_2"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/label_2"
        />

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