五、button圆角按压效果

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1. 给button设置按压效果

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<Button
	android:id="@+id/btnFeedback"
	android:layout_width="match_parent"
	android:layout_height="40dp"
	android:text="保存"
	android:gravity="center"
	android:background="@drawable/selector_blue_dark_bg"/>

selector_blue_dark_bg.xml内容如下：

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<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
	<item android:state_pressed="true" android:drawable="@color/colorPrimaryDark" />
	<item android:drawable="@color/colorPrimary" />
</selector>

button有按下效果，但是如何同时让四角有圆弧效果呢

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

	<item android:state_pressed="true">
		<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
			<!-- 圆角深蓝色按钮 -->
			<solid android:color="#3453e0"/>
			<corners android:radius="5dp"/>
		</shape>
	</item>

	<item android:state_pressed="false">
		<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
			<!-- 圆角蓝色按钮 -->
			<solid android:color="#3983fe"/>
			<corners android:radius="5dp"/>
		</shape>
	</item>
</selector>