ConstraintLayout的用法與相對佈局類似，但是希望大家用ConstraintLayout逐漸替代相對佈局。

效果圖還是如下：

方法一

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto">

<View
    android:id="@+id/view1"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:background="#ff00ff" />

    <View
        app:layout_constraintEnd_toEndOf="parent"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:background="#ff00ff"/>

    <View
        app:layout_constraintBottom_toBottomOf="parent"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:background="#ff00ff"/>

    <View
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:background="#ff00ff"/>

    <View
        android:layout_width="match_parent"
        android:layout_height="100dp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:background="#ff00ff"/>

    <View
        android:layout_width="100dp"
        android:layout_height="300dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:background="#ff00ff"/>

</android.support.constraint.ConstraintLayout>
 

方法二：

<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="100dp"
        android:layout_height="100dp"
        android:background="#00796B"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />


    <View
        android:id="@+id/view2"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_gravity="end"
        android:background="#FF5722"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent" />


    <View
        android:id="@+id/view3"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_gravity="end|bottom"
        android:background="#795548"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent" />


    <View
        android:id="@+id/view4"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_gravity="end"
        android:background="#7C4DFF"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />


    <View
        android:layout_width="100dp"
        android:layout_height="0dp"
        android:background="#1976D2"
        app:layout_constraintBottom_toTopOf="@id/view3"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/view1" />


    <View
        android:layout_width="0dp"
        android:layout_height="100dp"
        android:background="#1976D2"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>