<?xml version="1.0" encoding="utf-8"?><resources>       <declare-styleable name="MyView">        <attr name="MyViewColor" format="color"/>    </declare-styleable>   </resources>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:fab="http://schemas.android.com/apk/res-auto"    android:background="@color/background"    android:layout_width="match_parent"    android:layout_height="match_parent">    <com.my.MyView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        fab:MyViewColor="@color/pink"        android:layout_alignParentBottom="true"        android:layout_centerHorizontal="true"        android:layout_marginBottom="16dp"/></RelativeLayout>

public MyView(Context context, AttributeSet attrs) {    super(context, attrs, defStyle);        if (attrs!= null) {      TypedArray attr = context.obtainStyledAttributes(attrs, R.styleable.MyView, 0, 0);      if (attr != null) {        try {          mMyViewColor = attr.getColor(R.styleable.MyViewColor, getColor(android.R.color.white));               } finally {          attr.recycle();        }      }  }