LinearLayout addview() désactive la marge sur le premier enfant

Question

Je rencontre un problème lors de l'ajout dynamique de vues à LinearLayout. J'essaye de gonfler cardViews de xml. J'ajoute 4 CardView s et la vue de chaque est OK sauf le d'abord qui n'ont aucune marge. Je ne sais pas pourquoi. (tableau ci-dessous)

MainActivity.java

public class MainActivity extends AppCompatActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     setTitle("Select Sale"); 

     ShowSales(getSales()); 
    } 

    private void ShowSales(Sale[] sales) { 
     LinearLayout sale_layout = (LinearLayout) findViewById(R.id.sale_layout); 
     for (Sale sale : sales) { 
      CardView saleCard = (CardView) getLayoutInflater().inflate(R.layout.sale_card, (ViewGroup) findViewById(R.id.sale_card), false); 
      ((TextView) saleCard.findViewById(R.id.sale_name)).setText(sale.name); 
      ((TextView) saleCard.findViewById(R.id.sale_desc)).setText(sale.desc); 
      ((TextView) saleCard.findViewById(R.id.sale_price)).setText(sale.price + getString(R.string.dollar)); 
      sale_layout.addView(saleCard); 
     } 
    } 

    //temp method to get sales - in future will get sales from server 
    private Sale[] getSales() { 
     return new Sale[]{ 
       new Sale("Sale number 1", "desc desc desc desc", 14.90), 
       new Sale("Sale number 2", "desc desc desc desc", 19.90), 
       new Sale("Sale number 3", "desc desc desc desc", 25.90), 
       new Sale("Sale number 4", "desc desc desc desc", 17.90), 
     }; 
    } 

    class Sale { 
     String name, desc; 
     double price; 

     public Sale(String name, String desc, double price) { 
      this.name = name; 
      this.desc = desc; 
      this.price = price; 
     } 
    } 
} 

activity_main.xml

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

    <LinearLayout xmlns:app="http://schemas.android.com/apk/res-auto" 
     xmlns:tools="http://schemas.android.com/tools" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:orientation="vertical"> 

     <LinearLayout 
      android:id="@+id/sale_layout" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_marginBottom="16dp" 
      android:orientation="vertical" /> 

     <ImageButton 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:background="@android:color/transparent" 
      android:clickable="true" 
      android:src="@mipmap/ic_launcher" /> 
    </LinearLayout> 
</ScrollView> 

sale_card.xml

<?xml version="1.0" encoding="utf-8"?> 
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:id="@+id/sale_card" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:layout_margin="16dp" 
    android:clickable="true" 
    android:foreground="?attr/selectableItemBackground" 
    app:cardCornerRadius="@dimen/cardview_default_radius"> 

    <RelativeLayout 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:padding="8dp"> 

     <TextView 
      android:id="@+id/sale_name" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_alignParentStart="true" 
      android:layout_margin="8dp" 
      android:text="Sale name" 
      android:textSize="27sp" /> 

     <TextView 
      android:id="@+id/sale_desc" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_alignParentStart="true" 
      android:layout_below="@id/sale_name" 
      android:text="this is description of the sale" /> 

     <TextView 
      android:id="@+id/sale_price" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_alignParentEnd="true" 
      android:layout_alignParentTop="true" 
      android:text="100&#36;" 
      android:textSize="23sp" 
      android:textStyle="bold" /> 
    </RelativeLayout> 
</android.support.v7.widget.CardView> 

Answer 1

Au lieu de:

CardView saleCard = (CardView) getLayoutInflater() 
    .inflate(R.layout.sale_card, (ViewGroup) findViewById(R.id.sale_card), false); 

Perform:

CardView saleCard = (CardView) getLayoutInflater() 
    .inflate(R.layout.sale_card, sale_layout, false);