Android - 如何更改按钮编程时按下背景图片？

Question

如何使用Java而不是xml来执行以下操作？

<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
<item android:state_focused="true" android:state_pressed="true" android:drawable="@drawable/title_search_alt"/> 
<item android:state_focused="false" android:state_pressed="true" android:drawable="@drawable/title_search_alt"/> 
</selector> 

Answer 1

在这里找到答案：Replace selector images programmatically