My android device is 4.3 and don’t work round corner of cardView :
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/tools"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="@+id/CardStart"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="5dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:scaleType="centerCrop"
app:cardUseCompatPadding="true"
card_view:cardBackgroundColor="@color/BlackTrans"
card_view:cardCornerRadius="5dp"
card_view:cardElevation="0dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/txtTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/txtDescription"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageButton
android:id="@+id/imgbIcon"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:src="@drawable/ic_serch" />
</LinearLayout>
</LinearLayout>
</android.support.v7.widget.CardView>
And I write bellow code in my class but don’t work yet :
if (android.os.Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP)
{
holder.CardStart.setCardElevation(0);
holder.CardStart.setBackgroundColor(ContextCompat.getColor(context,R.color.BlackTrans));
holder.CardStart.setRadius(5);
holder.CardStart.setUseCompatPadding(true);
}
It turns out that calling View.setBackgroundColor(int) on a CardView removes the rounded corners.
To change the background colour of a card and retain the corners, one needs to call CardView.setCardBackgroundColor(int) instead.
That may be the case for certain visitors to this post.
When subclassing CardView, I suggest adding the following method to protect your corners from accidental removal:
/**
* Override prevents {@link View#setBackgroundColor(int)} being called,
* which removes the rounded corners.
*/
@Override
public void setBackgroundColor(@ColorInt int backgroundColor) {
setCardBackgroundColor(backgroundColor);
}
In particular, I was working on a custom view implementation for React Native, and React was automatically applying a background colour to the view. This override solved that problem; it means other developers do not need to know the details of the underlying view.
Answer：
use this in topmost layout declaration in xml layout file:
xmlns:card_view="http://schemas.android.com/apk/res-auto"
This solved the problem for me.
Answer：
Try adding this two attributes in your card view
card_view:cardPreventCornerOverlap="false"
card_view:cardUseCompatPadding="true"
Here is the documentation for the first attribute (which contains reference to the second)
https://developer.android.com/reference/android/support/v7/widget/CardView.html#setPreventCornerOverlap(boolean)
This should do the trick
Tags: androidandroid, view
