Lavekush Agrawal Lavekush Agrawal - 27 days ago 8
Android Question

CardView Shadow is not Showing, If More than one card is Overlapping to each other

Below is reference/Output scrrenshot
enter image description here

In the screen shot you can see there are four overlapping

CardView
, but corner shadow of top and right is not showing for front cards, (Only Showing shadow for last card)

Update: Below then lollipop shadow is working

Below is the XML code for one
CardView
, I'm programmatically inflating these CardView layout, and setting XY property to achieve the overlapping view

<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="@dimen/offer_card_width"
android:layout_height="97dp"
app:cardBackgroundColor="@color/windowBackgroundSecondary"
app:cardPreventCornerOverlap="false"
app:cardUseCompatPadding="true">

<RelativeLayout
android:padding="@dimen/padding_regular"
android:layout_width="match_parent"
android:layout_height="match_parent">

<ImageView
android:id="@+id/icon_offer"
android:layout_width="40dp"
android:layout_height="40dp"
android:background="@drawable/bg_circular_offer"
android:padding="8dp"
android:src="@drawable/ic_content_copy" />

<TextView
android:layout_marginLeft="@dimen/margin_regular"
android:id="@+id/text_offer_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@+id/icon_offer"
android:ellipsize="end"
android:maxLines="1"
android:textColor="@color/submit_button"
android:textSize="@dimen/text_size_regular"
android:text="Some content will be there" />

<TextView
android:id="@+id/text_offer_desc"
android:layout_marginTop="@dimen/margin_medium"
android:layout_marginLeft="@dimen/margin_regular"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/text_offer_title"
android:layout_toRightOf="@+id/icon_offer"
android:ellipsize="end"
android:maxLines="1"
android:textColor="@color/black"
android:textSize="@dimen/text_size_small"
android:text="Some content will be there, Some content will be there" />

<LinearLayout
android:layout_marginLeft="@dimen/margin_regular"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_toRightOf="@+id/icon_offer"
android:orientation="horizontal">

<TextView
android:textColor="#6f6f6f"
android:textSize="@dimen/text_size_regular"
android:layout_gravity="center_vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Code:" />

<TextView
android:id="@+id/text_copy_code"
android:layout_marginLeft="@dimen/margin_medium"
android:layout_gravity="center_vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:drawablePadding="@dimen/padding_medium"
android:ellipsize="end"
android:maxLines="1"
android:drawableRight="@drawable/ic_content_copy"
android:textColor="@color/label_header_opac"
android:textSize="@dimen/text_size_regular"
android:text="TEST2016" />
</LinearLayout>

</RelativeLayout>

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


Below is java code for inflating the cardview layout

private void setupUi() {

CardView cardView;
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);

frameLayout = (FrameLayout) findViewById(R.id.container_pager_offer);
frameLayout.removeAllViews();

CardView.LayoutParams params;

int cardMargin = (int) getResources().getDimension(R.dimen.offer_card_overlapping);
int sideMargin = (int) getResources().getDimension(R.dimen.margin_semi_large);

for (int i = 0; i < 4; i++) {
cardView = (CardView) inflater.inflate(R.layout.card_offer_for_pager, null);
TextView textView = (TextView) cardView.findViewById(R.id.text_copy_code);
CommonUtils.setIconColor(textView, 2, R.color.label_header_opac);
params = new CardView.LayoutParams((int) getResources().getDimension(R.dimen.offer_card_width),
(int) getResources().getDimension(R.dimen.offer_card_height));
cardView.setX(cardMargin * ( 4 - i ) + sideMargin); //XCOORD
cardView.setY(cardMargin * ( i + 1 )); //YCOORD
cardView.setLayoutParams(params);
frameLayout.addView(cardView);
}
}

Answer

I have found a simple answer for this,

Please add a parent layout to CardView, this parent either LinearLayout or RelativeLayout, and give the transparent background to parent then this will work

Below is the example

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <android.support.v7.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:cardBackgroundColor="@color/mdtp_circle_color"
        app:cardPreventCornerOverlap="false"
        app:cardUseCompatPadding="true">
    </android.support.v7.widget.CardView>
</LinearLayout >
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