添加已有item布局

1.item布局，名为 item_card：

<?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:layout_width="45dp"
    android:layout_height="70dp"
    app:cardBackgroundColor="#7feacdd1"
    app:cardCornerRadius="6dp">
    <TextView
        android:id="@+id/tv_info"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:gravity="center"/>
</android.support.v7.widget.CardView>

代码获取item，并给item和item中的控件设置一些属性：

View cardView = LayoutInflater.from(this).inflate(R.layout.item_card, null); //加载单个item布局
LinearLayout.LayoutParams params1 = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.MATCH_PARENT);
           cardView.setLayoutParams(params);
            TextView tvInfo = cardView.findViewById(R.id.tv_info);
            tvInfo.setBackgroundColor(this.getResources().getColor(R.color.colorRed));          

layoutParent 父布局添加item：

layoutParent.addView(cardView);