O2OA/o2android/app/src/main/res/layout/activity_o2_chat.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"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/cl_o2_chat_outside"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/white"
    tools:context=".app.im.O2ChatActivity">

    <include layout="@layout/snippet_appbarlayout_toolbar" />

    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/sr_o2_chat_message_layout"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintBottom_toTopOf="@+id/ll_o2_chat_input_layout"
        app:layout_constraintTop_toBottomOf="@+id/app_bar_layout_snippet">
        <android.support.v7.widget.RecyclerView
            android:id="@+id/rv_o2_chat_messages"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            />
    </android.support.v4.widget.SwipeRefreshLayout>


    <net.zoneland.x.bpm.mobile.v1.zoneXBPM.widgets.KeyboardLayout
        android:id="@+id/rv_o2_chat_emoji_box_out"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:visibility="gone">

    </net.zoneland.x.bpm.mobile.v1.zoneXBPM.widgets.KeyboardLayout>

    <LinearLayout
        android:id="@+id/ll_o2_chat_input_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/sr_o2_chat_message_layout"
        android:orientation="vertical">
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/spacing_small"
            android:layout_marginBottom="@dimen/spacing_small"
            android:paddingStart="@dimen/activity_horizontal_margin"
            android:paddingEnd="@dimen/activity_horizontal_margin"
            android:orientation="horizontal">
            <EditText
                android:id="@+id/et_o2_chat_input"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:background="@drawable/o2_chat_input_bg"
                android:maxLines="3"
                android:minHeight="36dp"
                android:hint="@string/chat_input_message"
                android:paddingLeft="@dimen/activity_horizontal_margin"
                android:paddingRight="@dimen/activity_horizontal_margin"
                android:textSize="16sp"
                android:imeOptions="actionSend"
                />

            <ImageView
                android:id="@+id/btn_o2_chat_emotion"
                android:layout_width="28dp"
                android:layout_height="28dp"
                android:layout_gravity="center_vertical"
                android:layout_marginStart="@dimen/activity_horizontal_margin"
                android:src="@mipmap/chat_emoji"
                android:visibility="visible"
                />

            <Button
                android:id="@+id/btn_o2_chat_send"
                android:layout_width="40dp"
                android:layout_height="30dp"
                android:layout_marginStart="@dimen/activity_horizontal_margin"
                android:background="@drawable/btn_bg_chat_send"
                android:text="@string/btn_send"
                android:textColor="@android:color/white"
                android:textSize="12sp"
                android:layout_gravity="center_vertical"
                android:visibility="gone" />

        </LinearLayout>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="@dimen/spacing_small"
            android:paddingStart="@dimen/activity_horizontal_margin"
            android:paddingEnd="@dimen/activity_horizontal_margin"
            android:orientation="horizontal"
            android:baselineAligned="false">
             <LinearLayout
                 android:id="@+id/ll_o2_chat_audio_btn"
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
                 android:orientation="vertical">
                 <ImageView
                     android:id="@+id/img_o2_chat_mic"
                     android:layout_width="28dp"
                     android:layout_height="28dp"
                     android:layout_gravity="center"
                     android:src="@mipmap/chat_iicon_yuyin" />
             </LinearLayout>
            <LinearLayout
                android:id="@+id/ll_o2_chat_album_btn"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:orientation="vertical">
                <ImageView
                    android:id="@+id/img_o2_chat_img"
                    android:layout_width="28dp"
                    android:layout_height="28dp"
                    android:layout_gravity="center"
                    android:src="@mipmap/chat_iicon_tupian" />
            </LinearLayout>
            <LinearLayout
                android:id="@+id/ll_o2_chat_camera_btn"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:orientation="vertical">
                <ImageView
                    android:id="@+id/img_o2_chat_camera"
                    android:layout_width="28dp"
                    android:layout_height="28dp"
                    android:layout_gravity="center"
                    android:src="@mipmap/chat_iicon_xiangji" />
            </LinearLayout>
            <LinearLayout
                android:id="@+id/ll_o2_chat_location_btn"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:orientation="vertical">
                <ImageView
                    android:id="@+id/img_o2_chat_location"
                    android:layout_width="28dp"
                    android:layout_height="28dp"
                    android:layout_gravity="center"
                    android:src="@mipmap/chat_icon_ditu" />
            </LinearLayout>
        </LinearLayout>

        <android.support.v7.widget.RecyclerView
            android:id="@+id/rv_o2_chat_emoji_box"
            android:layout_width="match_parent"
            android:layout_height="250dp"
            android:layout_marginBottom="@dimen/spacing_small"
            android:visibility="gone"
            android:paddingStart="@dimen/activity_horizontal_margin"
            android:paddingEnd="@dimen/activity_horizontal_margin"
            />

        <RelativeLayout
            android:id="@+id/tv_o2_chat_audio_send_box"
            android:layout_width="match_parent"
            android:layout_height="180dp"
            android:layout_marginBottom="@dimen/spacing_small"
            android:visibility="gone">
            <TextView
                android:id="@+id/tv_o2_chat_audio_speak_title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true"
                android:textSize="@dimen/font_small"
                android:textColor="@color/z_color_subtitle_font"
                android:text="@string/activity_im_audio_speak" />
            <TextView
                android:id="@+id/tv_o2_chat_audio_speak_duration"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true"
                android:layout_marginTop="@dimen/spacing_tiny"
                android:layout_below="@+id/tv_o2_chat_audio_speak_title"
                android:textSize="@dimen/font_mini"
                android:textColor="@color/z_color_primary_blur_blue"
                tools:text="00:01" />
            <ImageButton
                android:id="@+id/image_o2_chat_audio_speak_btn"
                android:layout_width="96dp"
                android:layout_height="96dp"
                android:src="@mipmap/chat_iicon_yuyin"
                android:layout_centerInParent="true"
                android:background="@drawable/f5_circle"
                />
        </RelativeLayout>

    </LinearLayout>

</android.support.constraint.ConstraintLayout>