layout_margin in CardView is not working properly

Question

I am playing with the new CardView, but the margins don't seem to be applying.

<?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_gravity="center" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="18dp" android:layout_marginLeft="18dp" android:layout_marginRight="18dp" card_view:cardCornerRadius="4dp" card_view:cardBackgroundColor="#FFA" card_view:layout_margind="4dp">  <LinearLayout     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:orientation="vertical">  <TextView     android:id="@+id/info_text"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="Hello World!"/>  <TextView     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="Hello World!"/>  <TextView     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="Hello World!"/>  <TextView     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="Hello World!"/>  <TextView     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="Hello World!"/>  </LinearLayout>  </android.support.v7.widget.CardView> 

By the way, I'm using it in a Fragment that is in a ViewPager. The card extends the entire width of the screen (match_parent) even though I am using android:layout_marginLeft="18dp" and android:layout_marginRight="18dp" on the CardView.

Any ideas what I might be doing wrong?

Answer 1

If you use RecyclerView to add CardView, android:layout_margin should be sufficient.

But using ListView to add CardView, you might do this:

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="wrap_content" >  <android.support.v7.widget.CardView     xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:layout_marginLeft="11dp"     android:layout_marginRight="11dp"     android:layout_marginTop="11dp">        (other layout ...) </android.support.v7.widget.CardView>  </FrameLayout> 

But it is usually not the optimal one.

Answer 2

I had the same issues before, I found answer in here... CardView layout_width="match_parent" does not match parent RecyclerView width

At the time of inflating the CardView xml inside your ViewPager, pass the ViewGroup in it. this will allow inflater to know which layout parameters to refer.

To inflate the layout file use something like below:

View v = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.view_list_item, viewGroup,false); 

Hope that helps