小编Raj*_*ari的帖子

目前使用约束布局来创建对话框并放置我的视图，但 0dp 的视图高度不起作用。

这里 recyclerview 不可见。

<?xml version="1.0" encoding="utf-8"?>
<layout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:bind="http://schemas.android.com/tools">
    <data>
        <variable
            name="passengerSeatViewModel"
            type="PassengerSeatViewModel" />
        <variable
            name="seatSelectionViewModel"
            type="SeatSelectionViewModel" />
    </data>
    <android.support.constraint.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/colorWhite">
        <android.support.constraint.Guideline
            android:id="@+id/guideline_left"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            app:layout_constraintGuide_begin="@dimen/_20dp" />
        <android.support.constraint.Guideline
            android:id="@+id/guideline_right"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            app:layout_constraintGuide_end="@dimen/_20dp" />
        <include
            android:id="@+id/header"
            layout="@layout/dialog_header"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            app:layout_constraintLeft_toRightOf="@+id/guideline_left"
            app:layout_constraintRight_toLeftOf="@+id/guideline_right"
            bind:header="@{@string/text_seat_selected_for}"
            bind:onCancelClick="@{passengerSeatViewModel}" />
        <android.support.v7.widget.AppCompatTextView
            android:id="@+id/tv_segment"
            style="@style/TextStyle_L_Black"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="@dimen/_5dp"
            android:layout_marginLeft="@dimen/_5dp"
            android:drawableEnd="@drawable/green_filled_tick"
            android:drawableRight="@drawable/green_filled_tick"
            android:drawablePadding="@dimen/_5dp"
            android:gravity="center"
            android:text="@{seatSelectionViewModel.getSelectedSegment()}"
            app:layout_constraintLeft_toRightOf="@+id/guideline_left"
            app:layout_constraintTop_toBottomOf="@+id/header" />
        <android.support.v7.widget.RecyclerView
            android:id="@+id/rv_passengers"
            android:layout_width="0dp"
            android:layout_height="0dp"
            android:layout_marginTop="@dimen/_3dp"
            app:layout_constraintBottom_toTopOf="@+id/barrier_select_seats"
            app:layout_constraintLeft_toLeftOf="@+id/guideline_left"
            app:layout_constraintRight_toRightOf="@+id/guideline_right"
            app:layout_constraintTop_toBottomOf="@+id/tv_segment"
            bind:data="@{seatSelectionViewModel.passengerAdapterViewModel}"
            bind:passengerViewModel="@{passengerSeatViewModel}" />
        <android.support.constraint.Group
            android:id="@+id/group_copy" …