压态下的波纹效应+正常状态下的透明度

Question

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).

这仅适用于设备API 21+.设备API <21时,我使用选择器,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<selector> 它可以工作(见下文),但如果你只是点击ImageView,纹波不可见(涟漪动画似乎被剪掉),只有你按下你才能看到涟漪.. .

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>

Answer 1

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>在透明背景上有波纹就足够了!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.

Answer 2

对我来说,它有效

<?xml version="1.0" encoding="utf-8"?>
    <ripple xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="@color/white"
    android:radius="3dp">
        <item android:drawable="@drawable/transparent_ripple_button"/>
</ripple>

和一个单独的

transparent_ripple_button.xml

在你的文件夹中

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_focused="true">
        <shape android:shape="rectangle">
            <solid android:color="@color/black_12" />
            <stroke android:width="0.2dp" android:color="@color/white" />
            <corners android:radius="3dp" />
        </shape>
    </item>

    <item android:state_pressed="true">
        <shape android:shape="rectangle">
            <solid android:color="@color/black_12" />
            <stroke android:width="0.2dp" android:color="@color/white" />
            <corners android:radius="3dp" />
        </shape>
    </item>

    <item>
        <shape android:shape="rectangle">
            <solid android:color="@android:color/transparent" />
            <stroke android:width="0.2dp" android:color="@color/white" />
            <corners android:radius="3dp" />
        </shape>
    </item>

</selector>