Android Imagebutton 按下效果

button_bg.xml

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

    <!-- pressed state / clicked state -->
    <item
        android:state_pressed="true"
        android:state_enabled="true"
        android:drawable="@color/bg_click_color"
        />

    <!-- enabled state / default state-->
    <item
        android:state_enabled="true"
        android:drawable="@android:color/transparent"
        />
</selector>

使用方法:

android:background="@drawable/button_bg"