Android Lollipop CardView의 파급 효과

Android Lollipop CardView의 파급 효과

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여기 에 Android 개발자 페이지에 설명 된대로 활동 XML 파일에서 android : backgound 속성을 설정하여 만지면 파급 효과를 표시하도록 CardView를 얻으려고 하지만 작동하지 않습니다. 애니메이션은 전혀 없지만 onClick의 메소드가 호출됩니다. here 제안 된대로 ripple.xml 파일을 만들려고 했지만 동일한 결과를 보았습니다 .

활동의 XML 파일에 표시되는 CardView :

<android.support.v7.widget.CardView
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="155dp"
    android:layout_height="230dp"
    android:elevation="4dp"
    android:translationZ="5dp"
    android:clickable="true"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:onClick="showNotices"
    android:background="?android:attr/selectableItemBackground"
    android:id="@+id/notices_card"
    card_view:cardCornerRadius="2dp">

</android.support.v7.widget.CardView> 

나는 안드로이드 개발에 비교적 익숙하지 않으므로 몇 가지 명백한 실수를했을 수도 있습니다.
미리 감사드립니다.

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다음을 추가해야합니다 CardView.

android:foreground="?android:attr/selectableItemBackground"
android:clickable="true"

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이 두 줄 코드를 XML보기에 추가하여 cardView에 파급 효과를 줄 수 있습니다.

android:clickable="true"
android:foreground="?android:attr/selectableItemBackground"

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나는 cardview에 파급 효과를 얻었습니다.

<android.support.v7.widget.CardView 
    xmlns:card_view="http://schemas.android.com/apk/res-auto" 
    android:clickable="true" 
    android:foreground="@drawable/custom_bg"/>

위 코드에서 볼 수있는 custom_bg의 경우 lollipop (drawable-v21 패키지) 및 pre-lollipop (drawable package) 장치 모두에 대한 xml 파일을 정의해야합니다. drawable-v21 패키지의 custom_bg의 코드는 다음과 같습니다.

<ripple 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="?android:attr/colorControlHighlight">
<item
    android:id="@android:id/mask"
    android:drawable="@android:color/white"/>
</ripple>

드로어 블 패키지의 custom_bg의 경우 코드는 다음과 같습니다.

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

<item android:state_pressed="true">
    <shape>
        <solid android:color="@color/colorHighlight"></solid>
    </shape>
</item>
<item>
    <shape>
        <solid android:color="@color/navigation_drawer_background"></solid>
    </shape>
</item>
</selector>

롤리팝 이전 기기에서는 클릭 효과가 견고하고 롤리팝 기기에서는 카드보기에 파급 효과가 있습니다.

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리플 효과는 사용중인 appcompat 지원 라이브러리에서 생략되었습니다. 잔물결을 보려면 Android L 버전을 사용하고 Android L 기기에서 테스트하십시오. AppCompat v7 사이트 당 :

"롤리팝 이전에 잔물결이없는 이유는 무엇입니까? RippleDrawable을 원활하게 실행할 수있는 많은 것들이 Android 5.0의 새로운 RenderThread입니다. 이전 버전의 Android에서 성능을 최적화하기 위해 RippleDrawable을 남겨 두었습니다."

Check out this link here for more info

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If the app minSdkVersion which you are working is level 9, you can use:

android:foreground="?selectableItemBackground"
android:clickable="true"

Instead, starting from level 11, you use:

android:foreground="?android:attr/selectableItemBackground"
android:clickable="true"

From documentation:

clickable - Defines whether this view reacts to click events. Must be a boolean value, either "true" or "false".

foreground - Defines the drawable to draw over the content. This can be used as an overlay. The foreground drawable participates in the padding of the content if the gravity is set to fill.

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For me, adding the foreground to CardView didn't work (reason unknown :/)

Adding the same to it's child layout did the trick.

CODE:

<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:id="@+id/card_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:focusable="true"
    android:clickable="true"
    card_view:cardCornerRadius="@dimen/card_corner_radius"
    card_view:cardUseCompatPadding="true">

    <LinearLayout
        android:id="@+id/card_item"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:foreground="?android:attr/selectableItemBackground"
        android:padding="@dimen/card_padding">

    </LinearLayout>
</android.support.v7.widget.CardView>

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If there is a root layout like RelativeLayout or LinearLayout which contain all of the adapter item's component in CardView, you have to set background attribute in that root layout. like:

<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="122dp"
android:layout_marginBottom="6dp"
android:layout_marginLeft="6dp"
android:layout_marginRight="6dp"
card_view:cardCornerRadius="4dp">

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/touch_bg"/>
</android.support.v7.widget.CardView>

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Add these two like of code work like a charm for any view like Button, Linear Layout, or CardView Just put these two lines and see the magic...

android:foreground="?android:attr/selectableItemBackground"
android:clickable="true"

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Ripple event for android Cardview control:

<android.support.v7.widget.CardView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:foreground="?android:attr/selectableItemBackground"
    android:clickable="true"
    android:layout_marginBottom="4dp"
    android:layout_marginTop="4dp" />

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I wasn't happy with AppCompat, so I wrote my own CardView and backported ripples. Here it's running on Galaxy S with Gingerbread, so it's definitely possible.

For more details check the source code.

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For those searching for a solution to the issue of the ripple effect not working on a programmatically created CardView (or in my case custom view which extends CardView) being shown in a RecyclerView, the following worked for me. Basically declaring the XML attributes mentioned in the other answers declaratively in the XML layout file doesn't seem to work for a programmatically created CardView, or one created from a custom layout (even if root view is CardView or merge element is used), so they have to be set programmatically like so:

private class MadeUpCardViewHolder extends RecyclerView.ViewHolder {
    private MadeUpCardView cardView;

    public MadeUpCardViewHolder(View v){
        super(v);

        this.cardView = (MadeUpCardView)v;

        // Declaring in XML Layout doesn't seem to work in RecyclerViews
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            int[] attrs = new int[]{R.attr.selectableItemBackground};
            TypedArray typedArray = context.obtainStyledAttributes(attrs);
            int selectableItemBackground = typedArray.getResourceId(0, 0);
            typedArray.recycle();

            this.cardView.setForeground(context.getDrawable(selectableItemBackground));
            this.cardView.setClickable(true);
        }
    }
}

Where MadeupCardView extends CardView Kudos to this answer for the TypedArray part.

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  android:foreground="?android:attr/selectableItemBackgroundBorderless"
   android:clickable="true"
   android:focusable="true"

Only working api 21 and use this not use this list row card view

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Add the following to your xml:

android:clickable="true"
android:focusable="true"
android:background="?android:attr/selectableItemBackground"

And add to your adapter (if it's your case)

    override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            val attrs = intArrayOf(R.attr.selectableItemBackground)
            val typedArray = holder.itemView.context.obtainStyledAttributes(attrs)
            val selectableItemBackground = typedArray.getResourceId(0, 0)
            typedArray.recycle()

            holder.itemView.isClickable = true
            holder.itemView.isFocusable = true
            holder.itemView.foreground = holder.itemView.context.getDrawable(selectableItemBackground)
        }
    }

참고URL : https://stackoverflow.com/questions/26942434/ripple-effect-on-android-lollipop-cardview