自定义波纹效果，速度、颜色、粗细可自定义，效果见效果图
效果图：
gradle依赖：
compile 'com.lxd:rippleview:1.0.0'
使用方法：
<com.lxd.rippleview.RippleView
android:id="@+id/ripple_view"
android:layout_centerInParent="true"
android:layout_width="150dp"
android:layout_height="150dp"
app:circle_color="@color/white" //圆环的颜色
app:ripple_duration="5000" //圆环从开始到结束的时间
app:circle_num="10" //最多同时显示几个圆环
app:stroke_width="1dp" //圆环宽度
app:max_radius_multiple="2" //最大圆环半径相对原始半径的倍数
/>
在父布局中添加： android:clipChildren="false"
Copyright 2017 aritraroy
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