我的每个RecyclerView条目下面都有一个很大的空间（整个屏幕其余部分几乎-不完整），我也不知道是什么原因引起的。我有一个带有重量的LinearLayout，但是它包含在另一个具有固定高度的LinearLayout中（如下代码所示）。这是我的EntryItem布局以及主机布局（Fragment）：
条目项布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="675dp"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:weightSum="5"
android:padding="16dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="vertical"
android:weightSum="7">
<android.support.v7.widget.CardView
android:id="@+id/top_card"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginBottom="-10dp"
android:layout_weight="2"
app:cardBackgroundColor="@color/redditOrange"
app:cardCornerRadius="10dp">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.constraint.Guideline
android:id="@+id/top_card_vert"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.075" />
<ImageView
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_marginLeft="4dp"
android:layout_marginTop="4dp"
app:srcCompat="@drawable/reddit"
app:layout_constraintRight_toLeftOf="@id/top_card_vert"/>
<TextView
android:id="@+id/label"
android:layout_width="349dp"
android:layout_height="20dp"
android:layout_marginLeft="30dp"
android:layout_marginTop="4dp"
android:fontFamily="@font/volte_regular"
android:gravity="center_vertical"
android:text="r/tifu"
app:layout_constraintStart_toEndOf="@id/top_card_vert"
android:textColor="#ffffff" />
</android.support.constraint.ConstraintLayout>
</android.support.v7.widget.CardView>
<android.support.v7.widget.CardView
android:id="@+id/main_card"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="5"
app:cardBackgroundColor="@color/cardColor"
app:cardElevation="7dp">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.constraint.Guideline
android:id="@+id/card_title_line"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.2" />
<TextView
android:paddingTop="2dp"
android:id="@+id/title"
android:layout_width="match_parent"
android:layout_height="20dp"
android:layout_marginLeft="4dp"
android:layout_marginTop="4dp"
android:fontFamily="@font/volte_bold"
android:text="TIFU by trying to buy a Christmas present for my wife"
app:layout_constraintBottom_toTopOf="@+id/card_title_line"
android:textColor="@color/offBlack" />
</android.support.constraint.ConstraintLayout>
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Using ConstraintLayouts to do percents are recommended instead of using nested weights (LinearLayouts) -->
<android.support.constraint.Guideline
android:id="@+id/hor_guideline_below"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_begin="73dp" />
<android.support.constraint.Guideline
android:id="@+id/above_text_content"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.27" />
<android.support.constraint.ConstraintLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<android.support.constraint.Guideline
android:id="@+id/ver_guideline_subtitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.32" />
<android.support.constraint.Guideline
android:id="@+id/hor_guideline_above"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.38" />
<TextView
android:id="@+id/author"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/volte_regular"
android:gravity="center_vertical"
android:paddingTop="7dp"
android:paddingBottom="1dp"
android:text="/u/TheFiveHundred"
android:textColor="@color/darkRedditOrange"
android:textSize="10sp"
app:layout_constraintLeft_toRightOf="@id/ver_guideline_subtitle"
app:layout_constraintTop_toBottomOf="@id/hor_guideline_above" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintStart_toEndOf="@id/author"
app:layout_constraintEnd_toStartOf="@id/date_created"
app:layout_constraintLeft_toRightOf="@id/ver_guideline_subtitle"
app:layout_constraintTop_toBottomOf="@id/hor_guideline_above"
android:paddingTop="5dp"
android:textColor="@color/darkRedditOrange"
android:textSize="10sp"
android:text="|"/>
<TextView
android:id="@+id/date_created"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="116dp"
android:fontFamily="@font/volte_regular"
android:gravity="center_vertical"
android:paddingBottom="1dp"
android:paddingTop="7dp"
android:text="12.12.2018"
android:textColor="@color/darkRedditOrange"
android:textSize="10sp"
app:layout_constraintLeft_toRightOf="@id/ver_guideline_subtitle"
app:layout_constraintTop_toBottomOf="@id/hor_guideline_above" />
</android.support.constraint.ConstraintLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal"
android:layout_gravity="bottom">
<ImageView
android:id="@+id/thumbnail"
android:layout_width="63dp"
android:layout_height="63dp"
android:layout_gravity="bottom"
android:layout_marginStart="4dp"
android:layout_marginBottom="3dp"
android:tint="@color/redditOrange"
app:srcCompat="@mipmap/ic_launcher" />
<TextView
android:id="@+id/textContent"
android:layout_width="304dp"
android:layout_height="63dp"
android:layout_gravity="bottom|end"
android:layout_marginEnd="8dp"
android:fontFamily="@font/volte_regular"
android:gravity="center_vertical"
android:paddingLeft="5dp"
android:text="@string/lorem_ipsum"
android:textColor="@color/darkGray"
android:textSize="12sp"
app:layout_constraintBottom_toTopOf="@+id/hor_guideline_below"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toEndOf="@+id/thumbnail"
app:layout_constraintTop_toBottomOf="@id/above_text_content"
app:layout_constraintVertical_bias="0.0" />
</LinearLayout>
</android.support.constraint.ConstraintLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
</LinearLayout>
片段布局（主机）
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/my_recycler_view"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
任何帮助将不胜感激。
答案 0 :(得分：1)
删除
android:weightSum="5"
来自父级LinearLayout。
另外，您是否需要此固定高度？：
android:layout_height="675dp"