2018-11-21 Tv 端使用约束布局 ConstraintLayout 的影响

Tv端使用 ConstraintLayout 布局，用了 水平权重 ， 垂直权重 一行5个，一排2个，平分整个界面，
焦点切换时 模块放大缩小动画，导致界面很卡;
布局展示:


OI_7CU`N~JWUYK7~4$W`R}A.png

代码展示：

<?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:focusable="false"
    android:clickable="false"
    android:padding="20dp">

    <android.support.constraint.ConstraintLayout
        android:id="@+id/layout_1"
        style="@style/Focusable"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_margin="10dp"
        android:background="@drawable/item_main_border_shape"
        app:layout_constraintBottom_toTopOf="@id/layout_6"
        app:layout_constraintEnd_toStartOf="@id/layout_2"
        app:layout_constraintHorizontal_weight="1"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_weight="1"
        tools:background="@color/colorAccent">

        <TextView
            android:id="@+id/im_teacher_name_1"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:gravity="start|bottom"
            android:padding="10dp"
            android:textColor="@color/txt_color_0"
            android:textSize="14sp"
            app:layout_constraintBottom_toTopOf="@id/im_class_name_bg_1"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_weight="3"
            tools:background="@color/colorPrimaryDark"
            tools:text="name" />

        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_class_name_bg_1"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_marginStart="2dp"
            android:layout_marginEnd="2dp"
            android:layout_marginBottom="2dp"
            app:actualImageScaleType="fitXY"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/im_teacher_name_1"
            app:layout_constraintVertical_weight="7"
            tools:background="@color/colorPrimary" />

        <TextView
            android:id="@+id/im_class_name_1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:gravity="center"
            android:padding="20dp"
            android:textColor="@color/txt_write_color"
            android:textSize="15sp"
            app:layout_constraintBottom_toBottomOf="@id/im_class_name_bg_1"
            app:layout_constraintEnd_toEndOf="@id/im_class_name_bg_1"
            app:layout_constraintStart_toStartOf="@id/im_class_name_bg_1"
            app:layout_constraintTop_toTopOf="@id/im_class_name_bg_1"
            tools:text="班级名称" />


        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_teacher_head_1"
            android:layout_width="0dp"
            android:layout_height="0dp"
            app:actualImageScaleType="centerCrop"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHeight_percent="0.3"
            app:layout_constraintHorizontal_bias="0.937"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.087"
            app:layout_constraintWidth_percent="0.3"
            app:roundedCornerRadius="5dp"
            tools:background="@color/colorPrimaryDark" />


    </android.support.constraint.ConstraintLayout>

    <android.support.constraint.ConstraintLayout
        android:id="@+id/layout_2"
        style="@style/Focusable"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_margin="10dp"
        android:background="@drawable/item_main_border_shape"
        app:layout_constraintBottom_toTopOf="@id/layout_7"
        app:layout_constraintEnd_toStartOf="@id/layout_3"
        app:layout_constraintHorizontal_weight="1"
        app:layout_constraintStart_toEndOf="@id/layout_1"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_weight="1"
        tools:background="@color/colorAccent">

        <TextView
            android:id="@+id/im_teacher_name_2"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:gravity="start|bottom"
            android:padding="10dp"
            android:textColor="@color/txt_color_0"
            android:textSize="14sp"
            app:layout_constraintBottom_toTopOf="@id/im_class_name_bg_2"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_weight="3"
            tools:background="@color/colorPrimaryDark"
            tools:text="name" />

        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_class_name_bg_2"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_marginStart="2dp"
            android:layout_marginEnd="2dp"
            android:layout_marginBottom="2dp"
            app:actualImageScaleType="fitXY"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/im_teacher_name_2"
            app:layout_constraintVertical_weight="7"
            tools:background="@color/colorPrimary" />

        <TextView
            android:id="@+id/im_class_name_2"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:gravity="center"
            android:padding="20dp"
            android:textColor="@color/txt_write_color"
            android:textSize="15sp"
            app:layout_constraintBottom_toBottomOf="@id/im_class_name_bg_2"
            app:layout_constraintEnd_toEndOf="@id/im_class_name_bg_2"
            app:layout_constraintStart_toStartOf="@id/im_class_name_bg_2"
            app:layout_constraintTop_toTopOf="@id/im_class_name_bg_2"
            tools:text="班级名称" />


        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_teacher_head_2"
            android:layout_width="0dp"
            android:layout_height="0dp"
            app:actualImageScaleType="centerCrop"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHeight_percent="0.3"
            app:layout_constraintHorizontal_bias="0.937"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.087"
            app:layout_constraintWidth_percent="0.3"
            app:roundedCornerRadius="5dp"
            tools:background="@color/colorPrimaryDark" />


    </android.support.constraint.ConstraintLayout>

    <android.support.constraint.ConstraintLayout
        android:id="@+id/layout_3"
        style="@style/Focusable"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_margin="10dp"
        android:background="@drawable/item_main_border_shape"
        app:layout_constraintBottom_toTopOf="@id/layout_8"
        app:layout_constraintEnd_toStartOf="@id/layout_4"
        app:layout_constraintHorizontal_weight="1"
        app:layout_constraintStart_toEndOf="@id/layout_2"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_weight="1"


        tools:background="@color/colorAccent">

        <TextView
            android:id="@+id/im_teacher_name_3"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:gravity="start|bottom"
            android:padding="10dp"
            android:textColor="@color/txt_color_0"
            android:textSize="14sp"
            app:layout_constraintBottom_toTopOf="@id/im_class_name_bg_3"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_weight="3"
            tools:background="@color/colorPrimaryDark"
            tools:text="name" />

        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_class_name_bg_3"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_marginStart="2dp"
            android:layout_marginEnd="2dp"
            android:layout_marginBottom="2dp"
            app:actualImageScaleType="fitXY"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/im_teacher_name_3"
            app:layout_constraintVertical_weight="7"
            tools:background="@color/colorPrimary" />

        <TextView
            android:id="@+id/im_class_name_3"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:gravity="center"
            android:padding="20dp"
            android:textColor="@color/txt_write_color"
            android:textSize="15sp"
            app:layout_constraintBottom_toBottomOf="@id/im_class_name_bg_3"
            app:layout_constraintEnd_toEndOf="@id/im_class_name_bg_3"
            app:layout_constraintStart_toStartOf="@id/im_class_name_bg_3"
            app:layout_constraintTop_toTopOf="@id/im_class_name_bg_3"
            tools:text="班级名称" />


        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_teacher_head_3"
            android:layout_width="0dp"
            android:layout_height="0dp"
            app:actualImageScaleType="centerCrop"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHeight_percent="0.3"
            app:layout_constraintHorizontal_bias="0.937"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.087"
            app:layout_constraintWidth_percent="0.3"
            app:roundedCornerRadius="5dp"
            tools:background="@color/colorPrimaryDark" />


    </android.support.constraint.ConstraintLayout>

    <android.support.constraint.ConstraintLayout
        android:id="@+id/layout_4"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_margin="10dp"
        android:background="@drawable/item_main_border_shape"
        app:layout_constraintBottom_toTopOf="@id/layout_9"
        app:layout_constraintEnd_toStartOf="@id/layout_5"
        app:layout_constraintHorizontal_weight="1"
        app:layout_constraintStart_toEndOf="@id/layout_3"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_weight="1"
        tools:background="@color/colorAccent">

        <TextView
            android:id="@+id/im_teacher_name_4"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:gravity="start|bottom"
            android:padding="10dp"
            android:textColor="@color/txt_color_0"
            android:textSize="14sp"
            app:layout_constraintBottom_toTopOf="@id/im_class_name_bg_4"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_weight="3"
            tools:background="@color/colorPrimaryDark"
            tools:text="name" />

        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_class_name_bg_4"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_marginStart="2dp"
            android:layout_marginEnd="2dp"
            android:layout_marginBottom="2dp"
            app:actualImageScaleType="fitXY"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toBottomOf="@id/im_teacher_name_4"
            app:layout_constraintVertical_weight="7"
            tools:background="@color/colorPrimary" />

        <TextView
            android:id="@+id/im_class_name_4"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:gravity="center"
            android:padding="20dp"
            android:textColor="@color/txt_write_color"
            android:textSize="15sp"
            app:layout_constraintBottom_toBottomOf="@id/im_class_name_bg_4"
            app:layout_constraintEnd_toEndOf="@id/im_class_name_bg_4"
            app:layout_constraintStart_toStartOf="@id/im_class_name_bg_4"
            app:layout_constraintTop_toTopOf="@id/im_class_name_bg_4"
            tools:text="班级名称" />


        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_teacher_head_4"
            android:layout_width="0dp"
            android:layout_height="0dp"
            app:actualImageScaleType="centerCrop"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHeight_percent="0.3"
            app:layout_constraintHorizontal_bias="0.937"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.087"
            app:layout_constraintWidth_percent="0.3"
            app:roundedCornerRadius="5dp"
            tools:background="@color/colorPrimaryDark" />

    </android.support.constraint.ConstraintLayout>

    <android.support.constraint.ConstraintLayout
        android:id="@+id/layout_5"
        style="@style/Focusable"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_margin="10dp"
        android:background="@drawable/item_main_border_shape"
        app:layout_constraintBottom_toTopOf="@id/layout_10"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_weight="1"
        app:layout_constraintStart_toEndOf="@id/layout_4"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_weight="1"


        tools:background="@color/colorAccent">

        <TextView
            android:id="@+id/im_teacher_name_5"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:gravity="start|bottom"
            android:padding="10dp"
            android:textColor="@color/txt_color_0"
            android:textSize="14sp"
            app:layout_constraintBottom_toTopOf="@id/im_class_name_bg_5"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_weight="3"
            tools:background="@color/colorPrimaryDark"
            tools:text="name" />

        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_class_name_bg_5"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_marginStart="2dp"
            android:layout_marginEnd="2dp"
            android:layout_marginBottom="2dp"
            app:actualImageScaleType="fitXY"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/im_teacher_name_5"
            app:layout_constraintVertical_weight="7"
            tools:background="@color/colorPrimary" />

        <TextView
            android:id="@+id/im_class_name_5"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:gravity="center"
            android:padding="20dp"
            android:textColor="@color/txt_write_color"
            android:textSize="15sp"
            app:layout_constraintBottom_toBottomOf="@id/im_class_name_bg_5"
            app:layout_constraintEnd_toEndOf="@id/im_class_name_bg_5"
            app:layout_constraintStart_toStartOf="@id/im_class_name_bg_5"
            app:layout_constraintTop_toTopOf="@id/im_class_name_bg_5"
            tools:text="班级名称" />


        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_teacher_head_5"
            android:layout_width="0dp"
            android:layout_height="0dp"
            app:actualImageScaleType="centerCrop"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHeight_percent="0.3"
            app:layout_constraintHorizontal_bias="0.937"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.087"
            app:layout_constraintWidth_percent="0.3"
            app:roundedCornerRadius="5dp"
            tools:background="@color/colorPrimaryDark" />


    </android.support.constraint.ConstraintLayout>

    <android.support.constraint.ConstraintLayout
        android:id="@+id/layout_6"
        style="@style/Focusable"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_margin="10dp"
        android:background="@drawable/item_main_border_shape"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@id/layout_7"
        app:layout_constraintHorizontal_weight="1"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/layout_1"
        app:layout_constraintVertical_weight="1"

        tools:background="@color/colorAccent">

        <TextView
            android:id="@+id/im_teacher_name_6"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:gravity="start|bottom"
            android:padding="10dp"
            android:textColor="@color/txt_color_0"
            android:textSize="14sp"
            app:layout_constraintBottom_toTopOf="@id/im_class_name_bg_6"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_weight="3"
            tools:background="@color/colorPrimaryDark"
            tools:text="name" />

        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_class_name_bg_6"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_marginStart="2dp"
            android:layout_marginEnd="2dp"
            android:layout_marginBottom="2dp"
            app:actualImageScaleType="fitXY"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/im_teacher_name_6"
            app:layout_constraintVertical_weight="7"
            tools:background="@color/colorPrimary" />

        <TextView
            android:id="@+id/im_class_name_6"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:gravity="center"
            android:padding="20dp"
            android:textColor="@color/txt_write_color"
            android:textSize="15sp"
            app:layout_constraintBottom_toBottomOf="@id/im_class_name_bg_6"
            app:layout_constraintEnd_toEndOf="@id/im_class_name_bg_6"
            app:layout_constraintStart_toStartOf="@id/im_class_name_bg_6"
            app:layout_constraintTop_toTopOf="@id/im_class_name_bg_6"
            tools:text="班级名称" />


        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_teacher_head_6"
            android:layout_width="0dp"
            android:layout_height="0dp"
            app:actualImageScaleType="centerCrop"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHeight_percent="0.3"
            app:layout_constraintHorizontal_bias="0.937"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.087"
            app:layout_constraintWidth_percent="0.3"
            app:roundedCornerRadius="5dp"
            tools:background="@color/colorPrimaryDark" />


    </android.support.constraint.ConstraintLayout>

    <android.support.constraint.ConstraintLayout
        android:id="@+id/layout_7"
        style="@style/Focusable"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_margin="10dp"
        android:background="@drawable/item_main_border_shape"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@id/layout_8"
        app:layout_constraintHorizontal_weight="1"
        app:layout_constraintStart_toEndOf="@id/layout_6"
        app:layout_constraintTop_toBottomOf="@id/layout_2"
        app:layout_constraintVertical_weight="1"


        tools:background="@color/colorAccent">

        <TextView
            android:id="@+id/im_teacher_name_7"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:gravity="start|bottom"
            android:padding="10dp"
            android:textColor="@color/txt_color_0"
            android:textSize="14sp"
            app:layout_constraintBottom_toTopOf="@id/im_class_name_bg_7"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_weight="3"
            tools:background="@color/colorPrimaryDark"
            tools:text="name" />

        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_class_name_bg_7"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_marginStart="2dp"
            android:layout_marginEnd="2dp"
            android:layout_marginBottom="2dp"
            app:actualImageScaleType="fitXY"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/im_teacher_name_7"
            app:layout_constraintVertical_weight="7"
            tools:background="@color/colorPrimary" />

        <TextView
            android:id="@+id/im_class_name_7"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:gravity="center"
            android:padding="20dp"
            android:textColor="@color/txt_write_color"
            android:textSize="15sp"
            app:layout_constraintBottom_toBottomOf="@id/im_class_name_bg_7"
            app:layout_constraintEnd_toEndOf="@id/im_class_name_bg_7"
            app:layout_constraintStart_toStartOf="@id/im_class_name_bg_7"
            app:layout_constraintTop_toTopOf="@id/im_class_name_bg_7"
            tools:text="班级名称" />


        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_teacher_head_7"
            android:layout_width="0dp"
            android:layout_height="0dp"
            app:actualImageScaleType="centerCrop"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHeight_percent="0.3"
            app:layout_constraintHorizontal_bias="0.937"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.087"
            app:layout_constraintWidth_percent="0.3"
            app:roundedCornerRadius="5dp"
            tools:background="@color/colorPrimaryDark" />


    </android.support.constraint.ConstraintLayout>

    <android.support.constraint.ConstraintLayout
        android:id="@+id/layout_8"
        style="@style/Focusable"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_margin="10dp"
        android:background="@drawable/item_main_border_shape"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@id/layout_9"
        app:layout_constraintHorizontal_weight="1"
        app:layout_constraintStart_toEndOf="@id/layout_7"
        app:layout_constraintTop_toBottomOf="@id/layout_3"
        app:layout_constraintVertical_weight="1"


        tools:background="@color/colorAccent">

        <TextView
            android:id="@+id/im_teacher_name_8"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:gravity="start|bottom"
            android:padding="10dp"
            android:textColor="@color/txt_color_0"
            android:textSize="14sp"
            app:layout_constraintBottom_toTopOf="@id/im_class_name_bg_8"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_weight="3"
            tools:background="@color/colorPrimaryDark"
            tools:text="name" />

        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_class_name_bg_8"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_marginStart="2dp"
            android:layout_marginEnd="2dp"
            android:layout_marginBottom="2dp"
            app:actualImageScaleType="fitXY"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/im_teacher_name_8"
            app:layout_constraintVertical_weight="7"
            tools:background="@color/colorPrimary" />

        <TextView
            android:id="@+id/im_class_name_8"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:gravity="center"
            android:padding="20dp"
            android:textColor="@color/txt_write_color"
            android:textSize="15sp"
            app:layout_constraintBottom_toBottomOf="@id/im_class_name_bg_8"
            app:layout_constraintEnd_toEndOf="@id/im_class_name_bg_8"
            app:layout_constraintStart_toStartOf="@id/im_class_name_bg_8"
            app:layout_constraintTop_toTopOf="@id/im_class_name_bg_8"
            tools:text="班级名称" />


        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_teacher_head_8"
            android:layout_width="0dp"
            android:layout_height="0dp"
            app:actualImageScaleType="centerCrop"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHeight_percent="0.3"
            app:layout_constraintHorizontal_bias="0.937"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.087"
            app:layout_constraintWidth_percent="0.3"
            app:roundedCornerRadius="5dp"
            tools:background="@color/colorPrimaryDark" />


    </android.support.constraint.ConstraintLayout>

    <android.support.constraint.ConstraintLayout
        android:id="@+id/layout_9"
        style="@style/Focusable"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_margin="10dp"
        android:background="@drawable/item_main_border_shape"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@id/layout_10"
        app:layout_constraintHorizontal_weight="1"
        app:layout_constraintStart_toEndOf="@id/layout_8"
        app:layout_constraintTop_toBottomOf="@id/layout_4"
        app:layout_constraintVertical_weight="1"
        tools:background="@color/colorAccent">

        <TextView
            android:id="@+id/im_teacher_name_9"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:gravity="start|bottom"
            android:padding="10dp"
            android:textColor="@color/txt_color_0"
            android:textSize="14sp"
            app:layout_constraintBottom_toTopOf="@id/im_class_name_bg_9"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_weight="3"
            tools:background="@color/colorPrimaryDark"
            tools:text="name" />

        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_class_name_bg_9"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_marginStart="2dp"
            android:layout_marginEnd="2dp"
            android:layout_marginBottom="2dp"
            app:actualImageScaleType="fitXY"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/im_teacher_name_9"
            app:layout_constraintVertical_weight="7"
            tools:background="@color/colorPrimary" />

        <TextView
            android:id="@+id/im_class_name_9"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:gravity="center"
            android:padding="20dp"
            android:textColor="@color/txt_write_color"
            android:textSize="15sp"
            app:layout_constraintBottom_toBottomOf="@id/im_class_name_bg_9"
            app:layout_constraintEnd_toEndOf="@id/im_class_name_bg_9"
            app:layout_constraintStart_toStartOf="@id/im_class_name_bg_9"
            app:layout_constraintTop_toTopOf="@id/im_class_name_bg_9"
            tools:text="班级名称" />


        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_teacher_head_9"
            android:layout_width="0dp"
            android:layout_height="0dp"
            app:actualImageScaleType="centerCrop"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHeight_percent="0.3"
            app:layout_constraintHorizontal_bias="0.937"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.087"
            app:layout_constraintWidth_percent="0.3"
            app:roundedCornerRadius="5dp"
            tools:background="@color/colorPrimaryDark" />


    </android.support.constraint.ConstraintLayout>

    <android.support.constraint.ConstraintLayout
        android:id="@+id/layout_10"
        style="@style/Focusable"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_margin="10dp"
        android:background="@drawable/item_main_border_shape"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_weight="1"
        app:layout_constraintStart_toEndOf="@id/layout_9"
        app:layout_constraintTop_toBottomOf="@id/layout_5"
        app:layout_constraintVertical_weight="1"


        tools:background="@color/colorAccent">

        <TextView
            android:id="@+id/im_teacher_name_10"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:gravity="start|bottom"
            android:padding="10dp"
            android:textColor="@color/txt_color_0"
            android:textSize="14sp"
            app:layout_constraintBottom_toTopOf="@id/im_class_name_bg_10"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_weight="3"
            tools:background="@color/colorPrimaryDark"
            tools:text="name" />

        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_class_name_bg_10"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_marginStart="2dp"
            android:layout_marginEnd="2dp"
            android:layout_marginBottom="2dp"
            app:actualImageScaleType="fitXY"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/im_teacher_name_10"
            app:layout_constraintVertical_weight="7"
            tools:background="@color/colorPrimary" />

        <TextView
            android:id="@+id/im_class_name_10"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:gravity="center"
            android:padding="20dp"
            android:textColor="@color/txt_write_color"
            android:textSize="15sp"
            app:layout_constraintBottom_toBottomOf="@id/im_class_name_bg_10"
            app:layout_constraintEnd_toEndOf="@id/im_class_name_bg_10"
            app:layout_constraintStart_toStartOf="@id/im_class_name_bg_10"
            app:layout_constraintTop_toTopOf="@id/im_class_name_bg_10"
            tools:text="班级名称" />


        <com.facebook.drawee.view.SimpleDraweeView
            android:id="@+id/im_teacher_head_10"
            android:layout_width="0dp"
            android:layout_height="0dp"
            app:actualImageScaleType="centerCrop"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintHeight_percent="0.3"
            app:layout_constraintHorizontal_bias="0.937"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.087"
            app:layout_constraintWidth_percent="0.3"
            app:roundedCornerRadius="5dp"
            tools:background="@color/colorPrimaryDark" />


    </android.support.constraint.ConstraintLayout>


</android.support.constraint.ConstraintLayout>
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