CardView


public class CardView extends FrameLayout


A FrameLayout with a rounded corner background and shadow.

CardView uses elevation property on Lollipop for shadows and falls back to a custom emulated shadow implementation on older platforms.

Due to expensive nature of rounded corner clipping, on platforms before Lollipop, CardView does not clip its children that intersect with rounded corners. Instead, it adds padding to avoid such intersection (See setPreventCornerOverlap to change this behavior).

Before Lollipop, CardView adds padding to its content and draws shadows to that area. This padding amount is equal to maxCardElevation + (1 - cos45) * cornerRadius on the sides and maxCardElevation * 1.5 + (1 - cos45) * cornerRadius on top and bottom.

Since padding is used to offset content for shadows, you cannot set padding on CardView. Instead, you can use content padding attributes in XML or setContentPadding in code to set the padding between the edges of the CardView and children of CardView.

Note that, if you specify exact dimensions for the CardView, because of the shadows, its content area will be different between platforms before Lollipop and after Lollipop. By using api version specific resource values, you can avoid these changes. Alternatively, If you want CardView to add inner padding on platforms Lollipop and after as well, you can call setUseCompatPadding and pass true.

To change CardView's elevation in a backward compatible way, use setCardElevation. CardView will use elevation API on Lollipop and before Lollipop, it will change the shadow size. To avoid moving the View while shadow size is changing, shadow size is clamped by getMaxCardElevation. If you want to change elevation dynamically, you should call setMaxCardElevation when CardView is initialized.

ref androidx.cardview.R.styleable#CardView_cardBackgroundColor

ref androidx.cardview.R.styleable#CardView_cardCornerRadius

ref androidx.cardview.R.styleable#CardView_cardElevation

ref androidx.cardview.R.styleable#CardView_cardMaxElevation

ref androidx.cardview.R.styleable#CardView_cardUseCompatPadding

ref androidx.cardview.R.styleable#CardView_cardPreventCornerOverlap

ref androidx.cardview.R.styleable#CardView_contentPadding

ref androidx.cardview.R.styleable#CardView_contentPaddingLeft

ref androidx.cardview.R.styleable#CardView_contentPaddingTop

ref androidx.cardview.R.styleable#CardView_contentPaddingRight

ref androidx.cardview.R.styleable#CardView_contentPaddingBottom

Summary

Public constructors

CardView(
    @NonNull Context context,
    @Nullable AttributeSet attrs,
    int defStyleAttr
)

Public methods

@NonNull ColorStateList

Returns the background color state list of the CardView.

float

Returns the backward compatible elevation of the CardView.

@Px int

Returns the inner padding before the Card's bottom edge

@Px int

Returns the inner padding after the Card's left edge

@Px int

Returns the inner padding before the Card's right edge

@Px int

Returns the inner padding after the Card's top edge

float

Returns the backward compatible maximum elevation of the CardView.

boolean

Returns whether CardView should add extra padding to content to avoid overlaps with rounded corners on pre-Lollipop platforms.

float

Returns the corner radius of the CardView.

boolean

Returns whether CardView will add inner padding on platforms Lollipop and after.

void

Updates the background ColorStateList of the CardView

void

Updates the background color of the CardView

void
setCardElevation(float elevation)

Updates the backward compatible elevation of the CardView.

void
setContentPadding(@Px int left, @Px int top, @Px int right, @Px int bottom)

Sets the padding between the Card's edges and the children of CardView.

void
setMaxCardElevation(float maxElevation)

Updates the backward compatible maximum elevation of the CardView.

void
setMinimumHeight(int minHeight)
void
setMinimumWidth(int minWidth)
void
setPadding(int left, int top, int right, int bottom)
void
setPaddingRelative(int start, int top, int end, int bottom)
void
setPreventCornerOverlap(boolean preventCornerOverlap)

On pre-Lollipop platforms, CardView does not clip the bounds of the Card for the rounded corners.

void
setRadius(float radius)

Updates the corner radius of the CardView.

void
setUseCompatPadding(boolean useCompatPadding)

CardView adds additional padding to draw shadows on platforms before Lollipop.

Protected methods

void
onMeasure(int widthMeasureSpec, int heightMeasureSpec)

Inherited Constants

From android.view.View
static final int
static final int
static final int
static final int
static final int
static final int
static final Property<ViewFloat>
static final int
static final String
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE = "creditCardExpirationDate"
static final String
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY = "creditCardExpirationDay"
static final String
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH = "creditCardExpirationMonth"
static final String
AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR = "creditCardExpirationYear"
static final String
static final String
AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE = "creditCardSecurityCode"
static final String
static final String
static final String
static final String
static final String
static final String
static final String
static final int
static final int
static final int
static final int
static final int
static final int
static final int
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static final int
static final int
static final int
static final int
static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int[]
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static final int
GONE = 8
static final int
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static final int
KEEP_SCREEN_ON = 67108864
static final int
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NO_ID = -1
static final int
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static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final int[]
static final Property<ViewFloat>
static final Property<ViewFloat>
static final Property<ViewFloat>
static final Property<ViewFloat>
static final Property<ViewFloat>
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int[]
static final int[]
static final int
static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final int
static final Property<ViewFloat>
static final Property<ViewFloat>
static final Property<ViewFloat>
static final String
VIEW_LOG_TAG = "View"
static final int
static final int[]
static final Property<ViewFloat>
static final Property<ViewFloat>
static final Property<ViewFloat>
From android.view.ViewGroup
static final int
static final int
static final int
static final int
static final int
static final int
static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

static final int

This field is deprecated.

Inherited methods

From android.widget.FrameLayout
boolean
FrameLayout.LayoutParams
FrameLayout.LayoutParams
CharSequence
boolean

This method is deprecated.

boolean
void
onLayout(boolean changed, int left, int top, int right, int bottom)
void
setForegroundGravity(int foregroundGravity)
void
setMeasureAllChildren(boolean measureAll)
boolean
From android.view.View
void
void
void
ViewPropertyAnimator
void
void
boolean
void
void

This method is deprecated.

void
boolean
boolean
boolean
boolean
boolean
canScrollHorizontally(int direction)
boolean
canScrollVertically(int direction)
final void
void
final void
boolean
void
void
static int
combineMeasuredStates(int curState, int newState)
int
int
int
void
WindowInsets
int
int
int
AccessibilityNodeInfo
void
void

This method is deprecated.

boolean
boolean
dispatchNestedFling(float velocityX, float velocityY, boolean consumed)
boolean
dispatchNestedPreFling(float velocityX, float velocityY)
boolean
dispatchNestedPrePerformAccessibilityAction(
    int action,
    Bundle arguments
)
boolean
dispatchNestedPreScroll(
    int dx,
    int dy,
    int[] consumed,
    int[] offsetInWindow
)
boolean
dispatchNestedScroll(
    int dxConsumed,
    int dyConsumed,
    int dxUnconsumed,
    int dyUnconsumed,
    int[] offsetInWindow
)
boolean
void
draw(Canvas canvas)
void
drawableHotspotChanged(float x, float y)
final OnBackInvokedDispatcher
final T
<T extends View> findViewById(int id)
final T
<T extends View> findViewWithTag(Object tag)
boolean

This method is deprecated.

void
forceHasOverlappingRendering(boolean hasOverlappingRendering)
void
void
generateDisplayHash(
    String hashAlgorithm,
    Rect bounds,
    Executor executor,
    DisplayHashResultCallback callback
)
static int
View.AccessibilityDelegate
int
AccessibilityNodeProvider
CharSequence
int
int
String
String
float
Animation
Matrix
IBinder
int[]
Map<IntegerInteger>
String[]
final AutofillId
int
AutofillValue
Drawable
BlendMode
ColorStateList
PorterDuff.Mode
int
final int
float
int
float
Rect
boolean
final boolean
final ContentCaptureSession
CharSequence
final Context
ContextMenu.ContextMenuInfo
final boolean
static int
getDefaultSize(int size, int measureSpec)
Display
final int[]
Bitmap

This method is deprecated.

int

This method is deprecated.

int

This method is deprecated.

void
long
float
int
boolean
boolean
int
ArrayList<View>
getFocusables(int direction)
void
Drawable
int
BlendMode
ColorStateList
PorterDuff.Mode
boolean
getGlobalVisibleRect(Rect r, Point globalOffset)
Handler
float
float
float
float
Runnable
final boolean
final int
void
getHitRect(Rect outRect)
int
int
Drawable
Drawable
int
int
int
int
boolean
KeyEvent.DispatcherState
int
int
int
ViewGroup.LayoutParams
final int
float
int
final boolean
void
getLocationInSurface(int[] location)
void
getLocationInWindow(int[] outLocation)
void
getLocationOnScreen(int[] outLocation)
Matrix
final int
final int
final int
final int
final int
int
int
int
int
int
int
int
int
View.OnFocusChangeListener
int
ViewOutlineProvider
int
int
ViewOverlay
int
int
int
int
int
int
final ViewParent
ViewParent
float