CardView not shown in RecyclerView

Question

I have a problem which is driving me nuts. Basically it is a simple RecyclerView which displays a cardview. There are a lot of posts out there already, which I checked. I have a

Answer 1

Just try after adding this line inside your recyclerview:

app:layout_behavior="@string/appbar_scrolling_view_behavior"

like this:

<android.support.v7.widget.RecyclerView
    android:id="@+id/rv"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">
</android.support.v7.widget.RecyclerView>

Hope it will help you.

Answer 2

You are using RecyclerView with vertical orientation (in Java code)

In the Activity XML you are setting the layout height to Wrap_Content

The card layout also has an height of match_parent

They will not work like that, I lost three days on this

Try to give fix height to your card layout, test also other alteration of other layout, it will work for you

Good luck

Answer 3

Your code is fine, The problem is with layout file: document_item.xml:

    <LinearLayout
        android:layout_width="match_parent"  
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <ImageView
            android:id="@+id/_photo"
            android:layout_width="wrap_content"  -->mistake
            android:layout_height="wrap_content"
            android:layout_weight="0.25" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent" -->mistake
            android:gravity="center_horizontal"
            android:orientation="vertical"
            ...

The second LinearLayout gets its height from parent (first LinearLayout), and the first one gets its height from its only child: ImageView (so without no drawable set, the second layout's height will be zero! ), if you set a drawable for ImageView (in onBindViewHolder method or in layout xml file) it probably crops some of TextView items, Also when you set android:layout_width to "wrap_content", actually you're ignoring layout_weight.

So edit layout file like this:

          ...
          <ImageView
            android:id="@+id/_photo"
            android:layout_width="0dp"
            android:layout_gravity="center_vertical"
            android:layout_height="wrap_content"
            android:layout_weight="0.25" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            ...