我希望ViewGroup中的ImageView,当按下时,绘制波纹,这是有效的!但是当按下ViewGroup时,其中的ImageView应保持透明,否则ImageView背景可见:(实际上,您看到的颜色为alpha-orange,是按下时的纹波).
这仅在设备API 21中发生.使用设备API< 21时,我使用选择器,当按下ViewGroup时,图像背景保持透明.layout.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@ id/item_detail_field" android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingLeft="@dimen/margin_left" android:paddingStart="@dimen/margin_left" android:paddingTop="@dimen/margin_top_item_field" android:paddingBottom="@dimen/margin_bottom" android:baselineAligned="false" android:background="@drawable/layout" android:stateListAnimator="@anim/touch_raise" android:orientation="horizontal">... <ImageView android:id="@ id/item_detail_showfield_icon" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/button_mini_oval" android:stateListAnimator="@anim/touch_raise" android:clickable="true" android:contentDescription="@null" android:scaleType="center" android:visibility="invisible" android:src="@drawable/show_button"/>...</LinearLayout>
绘制/ button_mini_oval.xml
<selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_pressed="true"> <shape android:shape="oval"> <solid android:color="@color/primary_highlight" /> </shape> </item> <item> <shape android:shape="oval"> <solid android:color="@android:color/transparent" /> </shape> </item></selector>
可绘制-V21 / button_mini_oval.xml
<ripple xmlns:android="http://schemas.android.com/apk/res/android" android:exitFadeDuration="@android:integer/config_shortAnimTime" android:color="?android:colorControlHighlight"> <item android:state_pressed="true"> <shape android:shape="oval"> <solid android:color="@android:color/white" /> </shape> </item> <item> <color android:color="@android:color/transparent" /> </item></ripple>
我在ripple xml中尝试了很多配置,添加了一个< selector>它可以工作(见下文),但是如果你只是点击ImageView,纹波就不可见了(涟漪动画似乎被剪掉了),只有你按下它才能看到涟漪……
在正常状态下,压力状态下的波纹和透明状态的组合是什么?
<ripple xmlns:android="http://schemas.android.com/apk/res/android" android:exitFadeDuration="@android:integer/config_shortAnimTime" android:color="?android:colorControlHighlight"> <item> <selector> <item android:state_pressed="true"> <shape android:shape="oval"> <solid android:color="@android:color/white" /> </shape> </item> <item> <color android:color="@android:color/transparent" /> </item> </selector> </item></ripple>
解决方法:
删除android:state_pressed =“true”,我找到了2个解决方案,但在这两种情况下我都丢失了touch_raise动画(为什么?):
带有蒙面纹波:
<ripple xmlns:android="http://schemas.android.com/apk/res/android" android:exitFadeDuration="@android:integer/config_shortAnimTime" android:color="?android:colorControlHighlight"> <item android:id="@android:id/mask"> <selector> <item> <shape android:shape="oval"> <solid android:color="@android:color/white" /> </shape> </item> <item> <color android:color="@android:color/transparent" /> </item> </selector> </item></ripple>
带有未掩盖的小纹波(好于1):
<ripple xmlns:android="http://schemas.android.com/apk/res/android" android:exitFadeDuration="@android:integer/config_shortAnimTime" android:color="?android:colorControlHighlight"> <selector> <item> <color android:color="@android:color/transparent" /> </item> </selector></ripple>
我不知道为什么添加< selector>就足够了在透明背景上有波纹!!!很多人都试图实现这一目标,但这不是谷歌的意图,相反,这种情况非常有用.
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