版权声明： https://blog.csdn.net/lyw_321/article/details/79798965
res-drawable-bg_login.xml:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@android:color/holo_blue_light" android:state_pressed="false"/>
<item android:state_pressed="true" android:drawable="@android:color/holo_red_light"/>
</selector>res-layout-activity_main:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.lyw.selectedtest.MainActivity">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/bg_login"
android:text="登陆"
/>
</LinearLayout>未点击按钮时：
点中按钮时：
