如何给按钮加上边框和点击效果?

How to put border on button and click effect?

我有这个按钮 XML,它具有透明背景,单击时颜色会改变,因此显示 "click effect"。

可绘制XML:

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

    <!-- press-->
    <item android:drawable="@android:color/transparent" android:state_pressed="false" />

    <!-- focused-->
    <item style="@style/AppTheme" android:drawable="@color/color_primary" android:state_pressed="true" />

    <!-- normal-->
    <item android:drawable="@android:color/transparent" />

</selector>

我的问题是,如何给这个按钮加上边框?或者一个 XML 例子,所以你有相同的结果。谢谢!

创建一个drawable,类似这样,selected.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
             android:shape="rectangle">
    <solid android:color="#ff0000"/>
    <stroke
        android:width="1dp"
        android:color="#00ff00" />
</shape>

然后更改此行

<item 
     style="@style/AppTheme" 
     android:drawable="@color/color_primary" 
     android:state_pressed="true" />

<item 
     style="@style/AppTheme" 
     android:drawable="@drawable/selected" 
     android:state_pressed="true" />

实心是背景色,边框是描边,你可以创建在选择器的不同状态下使用的drawable

你可以这样做: 1.首先像这样创建一个drawable文件:

<shape android:shape="rectangle">
     <!--apply button background transparent, full opacity-->
     <solid android:color="#00ffffff"/>
     <!--make button border solid color, nontransparent-->
     <stroke android:color="#stroke color" android:width="2dp"/>
     <corners android:radius="2dp"/>
</shape>

然后在您提供的代码中替换这些行:

<!-- press-->
<item android:drawable="path to above drawable" android:state_pressed="false" />

<!-- focused-->
<item style="@style/AppTheme" android:drawable="@color/color_primary" android:state_pressed="true" />

<!-- normal-->
<item android:drawable="path to above drawable" />

作为

<!-- press-->
<item android:drawable="path to above drawable" android:state_pressed="false" />

<!-- focused-->
<item style="@style/AppTheme" android:drawable="@color/color_primary" android:state_pressed="true" />

<!-- normal-->
<item android:drawable="path to above drawable" />