android客户端学习-button按钮边框及圆角

在drowable文件夹下创建button_border.xml

代码如下：

<?xml version="1.0" encoding="utf-8"?>
<selector
  xmlns:android="http://schemas.android.com/apk/res/android">

<!-- android:state_pressed 是否按下，如一个按钮触摸或者点击-->

  <item android:state_pressed="true">
  <shape>
      <gradient android:startColor="@color/white" android:endColor="@color/white"
      android:angle="90"/>
      <stroke android:width="1dip" android:color="@color/black"/>
      <corners android:radius="5dp"/>
      <padding android:left="5dp" android:top="5dp" android:right="5dp" android:bottom="5dp"/>
  </shape>
  </item>
 

<!-- android:state_focused 是否取得焦点，比如用户选择了一个文本框 -->

  <item android:state_focused="true">
  <shape>
      <gradient android:startColor="@color/white" android:endColor="@color/white"
      android:angle="90"/>
      <stroke android:width="1dip" android:color="@color/black"/>
      <corners android:radius="5dp"/>
      <padding android:left="5dp" android:top="5dp" android:right="5dp" android:bottom="5dp"/>
  </shape>
  </item>
 

<!-- 默认状态 -->

  <item>
  <shape>
      <gradient android:startColor="@color/white" android:endColor="@color/white"
      android:angle="90"/>  <!--背景颜色-->
      <stroke android:width="1dip" android:color="@color/black"/><!--边框宽度及颜色-->
      <corners android:radius="5dp"/><!--圆角-->
      <padding android:left="5dp" android:top="5dp" android:right="5dp" android:bottom="5dp"/>
  </shape>
  </item>
 
</selector>

 

在页面xml文件中调用如下：

<Button
                       android:id="@+id/order_add_btn"
                       android:layout_width="match_parent"
                       android:layout_height="40dp"
                       android:layout_marginLeft="40dp"
                       android:layout_marginStart="40dp"
                       android:layout_marginRight="40dp"
                       android:layout_marginEnd="40dp"
                       android:layout_centerVertical="true"
                       android:layout_centerHorizontal="true"
                       android:textColor="@color/white"
                       android:background="@drawable/button_border"
                       android:text="@string/btn_add"/>