android Shape Drawable创建两边半圆的按钮背景

<?xml version="1.0" encoding="utf-8"?>  
<shape xmlns:android="http://schemas.android.com/apk/res/android"   
    android:shape="rectangle">  
    <!-- 填充颜色 -->  
    <solid android:color="#FFFFFF"></solid>  
    <!-- 线的宽度，颜色灰色 -->  
    <stroke android:width="1dp" android:color="#63a219"></stroke>          
    <!-- 矩形的圆角半径 -->  
    <corners android:radius="10dp" />         
</shape>

?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity">

    <TextView

        android:text="Hello World!"

        android:id="@+id/tv1"

        android:background="@drawable/semi_round_backgroud"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_centerInParent="true"

        android:textSize="25dp"

        android:paddingTop="8dp"

        android:paddingBottom="8dp"

        android:paddingRight="15dp"

        android:paddingLeft="15dp"/>

 

</RelativeLayout>