android 觸及時的水波紋效果

	<?xml version="1.0" encoding="utf-8"?>
	<ripple
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:color="#000000">
	<!--ripple中的color為點擊時的顏色-->
	<!--基本顏色-->
	<item>
	<color android:color="#dddddd"/>
	</item>
	</ripple>
	<ImageView
	android:id="@+id/grid_cd"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	android:adjustViewBounds="true"
	android:src="@drawable/cd_example"/>

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