怎么在Android应用中添加一个文本输入框

<&#63;xml version="1.0" encoding="utf-8"&#63;><layer-list xmlns:android="http://schemas.android.com/apk/res/android" >  <item>    <shape android:shape="rectangle" >      <solid android:color="#0ac39e" />    </shape>  </item>  <item android:bottom="6dp">    <shape android:shape="rectangle" >      <solid android:color="#ffffff" />    </shape>  </item>  <item    android:bottom="1dp"    android:left="1dp"    android:right="1dp">    <shape android:shape="rectangle" >      <solid android:color="#ffffff" />    </shape>  </item>