I have a fragment with contains a RecyclerView with layout_width="match_parent":
<android.support.v7.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity$PlaceholderFragment" />
The item in the RecyclerView is a CardView also with layout_width="match_parent":
<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_gravity="center"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="20dp"
card_view:cardCornerRadius="4dp">
<TextView
android:layout_gravity="center"
android:id="@+id/info_text"
android:layout_width="match_parent"
android:gravity="center"
android:layout_height="match_parent"
android:textAppearance="?android:textAppearanceLarge"/>
</android.support.v7.widget.CardView>
I inflate the item view as below:
public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
CardView v = (CardView) LayoutInflater.from(parent.getContext())
.inflate(R.layout.card_listitem, null, true);
ViewHolder vh = new ViewHolder(v);
return vh;
}
But when I run the app, the CardView is rendered as wrap_content as shown below:
Note that this was run on emulator, not a real device.
Am I doing something wrong, or is it a bug?
Best Answer
The docs for
inflate
:It is important here to not supply true, but do supply the parent:
Supplying the
parent
View lets the inflater know what layoutparams to use. Supplying thefalse
parameter tells it to not attach it to the parent just yet. That is what theRecyclerView
will do for you.