我试图在卡片视图中获得涟漪效果,我通过添加Android开发者页面https://developer.android.com/training/material/animations.html中描述的android:background属性来实现它,但我没有得到涟漪效果,那么我将属性改为android:foreground,如https://stackoverflow.com/a/26975714/6866139中给出的那样我仍然没有得到涟漪效果是我的XML代码
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
card_view:cardBackgroundColor="@color/cardview_light_background"
card_view:cardElevation="3dp"
android:focusable="true"
android:focusableInTouchMode="true"
android:id="@+id/card_view"
android:clickable="true"
android:background="?android:attr/selectableItemBackground"
android:layout_margin="@dimen/password_list_item_card_view_layout_margin">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="70dp">
<TextView
android:layout_width="48dp"
android:layout_height="48dp"
android:id="@+id/logo_text_holder"
android:layout_marginTop="12dp"
android:layout_marginStart="12dp"
android:textColor="@color/colorPrimaryDark"
android:background="@drawable/circle"
android:paddingTop="8dp"
android:textSize="24sp"
android:textAlignment="center" />
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginStart="16dp"
android:layout_marginTop="8dp">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/name_holder"
android:textColor="@color/colorPrimaryDark"
android:textSize="24sp" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/email_holder"
android:textColor="@color/colorPrimaryDark"
android:textSize="14sp"/>
</LinearLayout>
</LinearLayout>
</android.support.v7.widget.CardView>
有没有办法实现它,请帮助我 在此先感谢
答案 0 :(得分:0)
我在childView
的{{1}}内有同样的问题,而不是CardView
使用android:layout_width="match_parent"
,如下面的代码:
android:layout_width="wrap_content"
触摸提升动画,在<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:cardBackgroundColor="@color/green"
android:foreground="?attr/selectableItemBackground"
android:background="?attr/selectableItemBackground"
android:stateListAnimator="@animator/lift_on_touch"
android:focusable="true"
android:clickable="true"
app:cardPreventCornerOverlap="false"
app:cardUseCompatPadding="true">
<TextView
android:id="@+id/notification_details_med_close"
android:layout_width="wrap_content"
android:padding="10dp"
android:layout_gravity="center"
android:layout_height="wrap_content"
android:background="@color/green"
android:text="CARDVIEW"
android:textAppearance="?android:textAppearanceLarge"
android:textColor="@android:color/white" />
</android.support.v7.widget.CardView>
文件夹中创建动画资源文件lift_on_touch
animator-v21
这将有助于CardView的材料设计效果。
注意: <?xml version="1.0" encoding="utf-8"?>
<!-- animate the translationZ property of a view when pressed -->
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_enabled="true"
android:state_pressed="true">
<set>
<objectAnimator
android:duration="@android:integer/config_shortAnimTime"
android:propertyName="translationZ"
android:valueTo="16dp"
android:valueType="floatType"/>
</set>
</item>
<item>
<set>
<objectAnimator
android:duration="@android:integer/config_shortAnimTime"
android:propertyName="translationZ"
android:valueTo="0"
android:valueType="floatType"/>
</set>
</item>
</selector>
适用于API 21及更高版本。