ConstraintLayout

    android:id="@+id/activity_main"
    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:background="#11ff0000"
    tools:context="com.administrator.webview.ConstraintActivity">

            android:id="@+id/banner"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#765"
        android:gravity="center"
        android:text="Banner"
        app:layout_constraintDimensionRatio="16:6"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"/>

            android:id="@+id/tv1"
        android:layout_width="140dp"
        android:layout_height="86dp"
        android:layout_marginLeft="12dp"
        android:layout_marginTop="12dp"
        android:background="#fd3"
        app:layout_constraintTop_toBottomOf="@id/banner"
        />

            android:id="@+id/tv2"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="12dp"
        android:text="马云:一年交税170多亿马云:一年交税170多亿马云:一年交税170多亿"
        android:textColor="#000000"
        android:textSize="16dp"
        app:layout_constraintLeft_toRightOf="@id/tv1"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="@id/tv1"/>

            android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="8dp"
        android:layout_marginTop="12dp"
        android:text="8分钟前"
        android:textColor="#333"
        android:textSize="12dp"
        app:layout_constraintBottom_toBottomOf="@id/tv1"
        app:layout_constraintLeft_toRightOf="@id/tv1"/>

            android:id="@+id/tab1"
        android:layout_width="0dp"
        android:layout_height="30dp"
        android:background="#f67"
        android:gravity="center"
        android:text="Tab1"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toLeftOf="@+id/tab2"/>


            android:id="@+id/tab2"
        android:layout_width="0dp"
        android:layout_height="30dp"
        android:background="#A67"
        android:gravity="center"
        android:text="Tab2"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toRightOf="@id/tab1"
        app:layout_constraintRight_toLeftOf="@+id/tab3"/>


            android:id="@+id/tab3"
        android:layout_width="0dp"
        android:layout_height="30dp"
        android:background="#767"
        android:gravity="center"
        android:text="Tab3"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toRightOf="@id/tab2"
        app:layout_constraintRight_toRightOf="parent"/>

            android:layout_width="60dp"
        android:layout_height="60dp"
        android:background="#612"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHorizontal_bias="0.9"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.9"/>

​