MaterialCardView 的不同角半径值

Question

Is is possible to have different values for each corner radius of a MaterialCardView? And if so how?

I tried something like the code below but it doesn't seem to have any effect

    float radius = getContext().getResources().getDimension(R.dimen.default_corner_radius);
    ShapePathModel leftShapePathModel = new ShapePathModel();
    leftShapePathModel.setTopLeftCorner(new RoundedCornerTreatment(radius));
    leftShapePathModel.setTopRightCorner(new RoundedCornerTreatment(radius));
    MaterialShapeDrawable bg = new MaterialShapeDrawable(leftShapePathModel);
    container.setBackground(bg);

where container is

@BindView(R.id.container) MaterialCardView container;

Answer 1

You can use a custom style and the shapeAppearanceOverlay attribute.

  <style name="MyCardView" parent="@style/Widget.MaterialComponents.CardView">
    <item name="shapeAppearanceOverlay">@style/ShapeAppearanceOverlay.MaterialCardView.Cut</item>
  </style>


  <style name="ShapeAppearanceOverlay.MaterialCardView.Cut" parent="">
    <item name="cornerFamily">rounded</item>
    <item name="cornerSizeTopRight">8dp</item>
    <item name="cornerSizeTopLeft">8dp</item>
    <item name="cornerSizeBottomRight">0dp</item>
    <item name="cornerSizeBottomLeft">0dp</item>
  </style>

or you can apply a custom ShapeAppearanceModel to the corner of the card using something like:

float radius = getResources().getDimension(R.dimen.my_corner_radius);
cardView.setShapeAppearanceModel(
  cardView.getShapeAppearanceModel()
      .toBuilder()
      .setTopLeftCorner(CornerFamily.ROUNDED,radius)
      .setTopRightCorner(CornerFamily.ROUNDED,radius)
      .setBottomRightCornerSize(0)
      .setBottomLeftCornerSize(0)
      .build());

Answer 2

Try This Also

     <style name="TopCornerCardview" parent="Widget.MaterialComponents.CardView">
        <item name="cornerFamily">rounded</item>
        <item name="cornerSizeTopRight">@dimen/dp25</item>
        <item name="cornerSizeTopLeft">@dimen/dp25</item>
        <item name="cornerSizeBottomRight">0dp</item>
        <item name="cornerSizeBottomLeft">0dp</item>
        <item name="contentPadding">0dp</item>
    </style>

    <com.google.android.material.card.MaterialCardView
            style="@style/TopCornerCardview"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:theme="@style/TopCornerCardview"
            app:cardBackgroundColor="@color/colorAccent"
            app:cardUseCompatPadding="true">

>
<!--views here-->
</com.google.android.material.card.MaterialCardView>

Answer 3

I think you should be able to call ShapeAppearanceModel shape = ((MaterialShapeDrawable)container.getBackground()).getShapeAppearanceModel() on your MaterialCardView . From there you could call setTopLeftCorner() or the other methods to set corner treatments with different values. You may need to call container.invalidate() after you set the corners.

Answer 4

My initial solution was correct but it was missing one line:

float radius = getContext().getResources().getDimension(R.dimen.default_corner_radius);
ShapePathModel leftShapePathModel = new ShapePathModel();
leftShapePathModel.setTopLeftCorner(new RoundedCornerTreatment(radius));
leftShapePathModel.setTopRightCorner(new RoundedCornerTreatment(radius));
MaterialShapeDrawable bg = new MaterialShapeDrawable(leftShapePathModel);
container.setBackground(bg);

If you add

container.invalidate()

as suggested by Cameron above it seems to work.