sheishuoAPP/app/res/layout/team_avchat_item.xml

<?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"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <ImageView
        android:id="@+id/avatar_image"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:scaleType="centerCrop"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintDimensionRatio="1:1"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <ImageView
        android:id="@+id/loading_image"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:scaleType="center"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <TextView
        android:id="@+id/avchat_state_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/avchat_no_pick_up"
        android:textAlignment="center"
        android:textColor="@color/white"
        android:textSize="12sp"
        android:visibility="invisible"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <com.netease.nimlib.sdk.avchat.model.AVChatVideoRender
        android:id="@+id/surface"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:visibility="invisible"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintDimensionRatio="1:1"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <android.support.constraint.ConstraintLayout
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:background="@color/color_gray_alpha40"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent">

        <TextView
            android:id="@+id/nick_name_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="3dip"
            android:ellipsize="end"
            android:maxLines="1"
            android:text="@string/online"
            android:textAlignment="center"
            android:textColor="@color/white"
            android:textSize="12sp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <ProgressBar
            android:id="@+id/avchat_volume"
            style="?android:attr/progressBarStyleHorizontal"
            android:layout_width="0dp"
            android:layout_height="16dp"
            android:max="600"
            android:progress="0"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent" />
    </android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>