<?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">
   <Button
       android:id="@+id/btn_checkUpdate"
       android:layout_height="40dp"
       android:layout_width="150dp"
       android:text="检查更新"/>
</LinearLayout>