如何减少RecyclerView内CardView卡之间的空间？

Question

我正在为我的应用程序的主屏幕进行布局。我正在使用带有网格布局和CardView的RecyclerView。我试图减少每张卡之间的空间。截图如下（打开布局大纲）以及我的布局文件。我怎样才能让每张卡在垂直方向和水平方向上彼此接近？我一直在利用很多利润，我似乎无法找到合适的保证金或填充值来做到这一点。谢谢你的帮助！

thumbnail_view.xml：

<?xml version="1.0" encoding="utf-8"?> 

<android.support.v7.widget.CardView 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:card_view="http://schemas.android.com/apk/res-auto" 
    android:id="@+id/card_view" 
    android:layout_width="match_parent" 
    android:layout_height="200dp" 
    card_view:cardCornerRadius="5dp" 
    card_view:cardMaxElevation="15dp" 
    card_view:cardElevation="10dp" 
    card_view:contentPadding="5dp" 
    android:padding="1dp" 
    card_view:cardBackgroundColor="@color/colorPrimary" 
    card_view:cardUseCompatPadding="true" 
    card_view:cardPreventCornerOverlap="false" 
    > 

    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:orientation="vertical" 
     android:id="@+id/card_list"> 
     <ImageView 
      android:id="@+id/thumbnail" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:layout_gravity="center" 
      android:gravity="center" 
      android:contentDescription="@string/video_thumbnail_description" 
      android:layout_weight="1" 
      /> 

     <TextView 
      android:id="@+id/video_title_view" 
      android:layout_height="match_parent" 
      android:layout_width="wrap_content" 
      android:layout_gravity="center" 
      android:gravity="center" 
      android:layout_weight="2" 
      /> 
    </LinearLayout> 
</android.support.v7.widget.CardView> 

activity_main.xml中

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:id="@+id/activity_main" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin" 
    tools:context="com.app.int_a.giantbombforandroid.main.mainscreen.MainActivity"> 

    <android.support.v7.widget.RecyclerView 
     android:id="@+id/my_recycler_list" 
     android:scrollbars="vertical" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent"/> 
</RelativeLayout> 

Answer 1

编辑这些属性

card_view:cardMaxElevation="1dp" 
card_view:cardElevation="1dp" 

所以完整的代码将b e

<?xml version="1.0" encoding="utf-8"?> 

<android.support.v7.widget.CardView 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:card_view="http://schemas.android.com/apk/res-auto" 
    android:id="@+id/card_view" 
    android:layout_width="match_parent" 
    android:layout_height="200dp" 
    card_view:cardCornerRadius="5dp" 
    card_view:cardMaxElevation="1dp" 
    card_view:cardElevation="1dp" 
     card_view:cardBackgroundColor="@color/colorPrimary" 
    card_view:cardUseCompatPadding="true" 
    card_view:cardPreventCornerOverlap="false" 
    > 

    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:orientation="vertical" 
     android:id="@+id/card_list"> 
     <ImageView 
      android:id="@+id/thumbnail" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:layout_gravity="center" 
      android:gravity="center" 
      android:src="@drawable/bag" 
      android:contentDescription="string/video_thumbnail_description" 
      android:layout_weight="1" 
      /> 

     <TextView 
      android:id="@+id/video_title_view" 
      android:layout_height="match_parent" 
      android:layout_width="wrap_content" 
      android:layout_gravity="center" 
      android:gravity="center" 
      android:text="lovelksdjslkdjlsdj" 
      android:layout_weight="3" 
      /> 
    </LinearLayout> 
</android.support.v7.widget.CardView>