<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
  <com.mang.xdy.demo.widget.CanvasView
      android:id="@+id/canvas_doc_show"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" />
</LinearLayout>