CardView is wrap_content list item instead of match_parent

Question

Card View wrapping content instead of match parent. All list items is wrapped instead of matching its width.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout      
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <android.support.v7.widget.CardView
        android:id="@+id/card_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:layout_margin="@dimen/card_margin"
        android:elevation="3dp"
        card_view:cardCornerRadius="@dimen/card_album_radius">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <ImageView
                android:layout_width="80dp"
                android:layout_height="80dp"
                android:id="@+id/Album_Art"
                android:layout_alignParentTop="true"
                android:layout_alignParentLeft="true"
                android:layout_alignParentStart="true"
                android:src="@drawable/ic_google_music" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceMedium"
                android:text="@string/song_name"
                android:id="@+id/Sname"
                android:layout_alignParentTop="true"
                android:layout_toRightOf="@+id/Album_Art"
                android:layout_toEndOf="@+id/Album_Art" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="?android:attr/textAppearanceSmall"
                android:text="@string/artist_album"
                android:id="@+id/Sdata"
                android:layout_centerVertical="true"
                android:layout_centerHorizontal="true"
                android:layout_toRightOf="@+id/Album_Art"
                android:layout_toEndOf="@+id/Album_Art"/>

        </RelativeLayout>
    </android.support.v7.widget.CardView>
</LinearLayout>

Manually setting width works. When i set it to a large dp value, it works fine, except that the list item is out of the window. I don't understand why match_parent doesn't work. Any leads on how to fix this would be greatly appreciated.

Answer 1

Are you using a recyclerView ? if so, you should override this on layoutmanager like this :

    layoutManager = new LinearLayoutManager(getActivity()) {
            @Override
            public RecyclerView.LayoutParams generateDefaultLayoutParams() {
                return new RecyclerView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                        ViewGroup.LayoutParams.WRAP_CONTENT);
            }
        };
    }

Answer 2

If you are using a RecyclerViewAdapter , make sure you are using the first signature of inflate method instead of the second in the onCreateViewHolder .

1. inflate(LayoutInflater inflater, ViewGroup root, boolean attachToRoot)  

2. inflate(LayoutInflater inflater)

And, be sure to pass parent for root & true/false for attachToRoot.