ResourcesCompat

Kotlin |Java

class ResourcesCompat

kotlin.Any
↳	androidx.core.content.res.ResourcesCompat

Helper for accessing features in android.content.res.Resources.

Summary

Nested classes
abstract	`FontCallback` Interface used to receive asynchronous font fetching events.
	`ThemeCompat` Provides backward-compatible implementations for new `Theme` APIs.

Constants
static Int	`ID_NULL` The `null` resource ID.

Public methods
static Typeface?	`getCachedFont(@NonNull context: Context, @FontRes id: Int)` Returns a cached font Typeface associated with a particular resource ID.
static Int	`getColor(@NonNull res: Resources, @ColorRes id: Int, @Nullable theme: Theme?)` Returns a themed color integer associated with a particular resource ID.
static ColorStateList?	`getColorStateList(@NonNull res: Resources, @ColorRes id: Int, @Nullable theme: Theme?)` Returns a themed color state list associated with a particular resource ID.
static Drawable?	`getDrawable(@NonNull res: Resources, @DrawableRes id: Int, @Nullable theme: Theme?)` Return a drawable object associated with a particular resource ID and styled for the specified theme.
static Drawable?	`getDrawableForDensity(@NonNull res: Resources, @DrawableRes id: Int, density: Int, @Nullable theme: Theme?)` Return a drawable object associated with a particular resource ID for the given screen density in DPI and styled for the specified theme.
static Float	`getFloat(@NonNull res: Resources, @DimenRes id: Int)` Retrieve a floating-point value for a particular resource ID.
static Typeface?	`getFont(@NonNull context: Context, @FontRes id: Int)` Returns a font Typeface associated with a particular resource ID.
static Unit	`getFont(@NonNull context: Context, @FontRes id: Int, @NonNull fontCallback: ResourcesCompat.FontCallback, @Nullable handler: Handler?)` Returns a font Typeface associated with a particular resource ID asynchronously.

Constants

ID_NULL

@AnyRes static val ID_NULL: Int

The null resource ID. This denotes an invalid resource ID that is returned by the system when a resource is not found or the value is set to @null in XML.

Value: 0

Public methods

getCachedFont

@Nullable static fun getCachedFont(
    @NonNull context: Context, 
    @FontRes id: Int
): Typeface?

Returns a cached font Typeface associated with a particular resource ID.

This method returns non-null Typeface if the requested font is already fetched. Otherwise immediately returns null without requesting to font provider.

Prior to API level 23, font resources with more than one font in a family will only load the font closest to a regular weight typeface.

Parameters
`context`	Context: A context to retrieve the Resources from.
`id`	Int: The desired resource identifier of a `Typeface`, as generated by the aapt tool. This integer encodes the package, type, and resource entry. The value 0 is an invalid identifier.

Return
`Typeface?`	A font Typeface object.

Exceptions
`NotFoundException`	Throws NotFoundException if the given ID does not exist.

See Also

#getFont(Context, int, FontCallback, Handler)

getColor

@ColorInt static fun getColor(
    @NonNull res: Resources, 
    @ColorRes id: Int, 
    @Nullable theme: Theme?
): Int

Returns a themed color integer associated with a particular resource ID. If the resource holds a complex ColorStateList, then the default color from the set is returned.

Prior to API level 23, the theme will not be applied and this method calls through to Resources#getColor(int).

Parameters
`id`	Int: The desired resource identifier, as generated by the aapt tool. This integer encodes the package, type, and resource entry. The value 0 is an invalid identifier.
`theme`	Theme?: The theme used to style the color attributes, may be `null`.

Return
`Int`	A single color value in the form `0xAARRGGBB`.

Exceptions
`NotFoundException`	Throws NotFoundException if the given ID does not exist.

getColorStateList

@Nullable static fun getColorStateList(
    @NonNull res: Resources, 
    @ColorRes id: Int, 
    @Nullable theme: Theme?
): ColorStateList?

Returns a themed color state list associated with a particular resource ID. The resource may contain either a single raw color value or a complex ColorStateList holding multiple possible colors.

Prior to API level 23, the theme will not be applied and this method calls through to Resources#getColorStateList(int).

Parameters
`id`	Int: The desired resource identifier of a `ColorStateList`, as generated by the aapt tool. This integer encodes the package, type, and resource entry. The value 0 is an invalid identifier.
`theme`	Theme?: The theme used to style the color attributes, may be `null`.

Return
`ColorStateList?`	A themed ColorStateList object containing either a single solid color or multiple colors that can be selected based on a state.

Exceptions
`NotFoundException`	Throws NotFoundException if the given ID does not exist.

getDrawable

@Nullable static fun getDrawable(
    @NonNull res: Resources, 
    @DrawableRes id: Int, 
    @Nullable theme: Theme?
): Drawable?

Return a drawable object associated with a particular resource ID and styled for the specified theme. Various types of objects will be returned depending on the underlying resource -- for example, a solid color, PNG image, scalable image, etc.

Prior to API level 21, the theme will not be applied and this method simply calls through to Resources#getDrawable(int).

Parameters
`id`	Int: The desired resource identifier, as generated by the aapt tool. This integer encodes the package, type, and resource entry. The value 0 is an invalid identifier.
`theme`	Theme?: The theme used to style the drawable attributes, may be `null`.

Return
`Drawable?`	Drawable An object that can be used to draw this resource.

Exceptions
`NotFoundException`	Throws NotFoundException if the given ID does not exist.

getDrawableForDensity

@Nullable static fun getDrawableForDensity(
    @NonNull res: Resources, 
    @DrawableRes id: Int, 
    density: Int, 
    @Nullable theme: Theme?
): Drawable?

Return a drawable object associated with a particular resource ID for the given screen density in DPI and styled for the specified theme.

Prior to API level 15, the theme and density will not be applied and this method simply calls through to Resources#getDrawable(int).

Prior to API level 21, the theme will not be applied and this method calls through to Resources#getDrawableForDensity(int, int).

Parameters
`id`	Int: The desired resource identifier, as generated by the aapt tool. This integer encodes the package, type, and resource entry. The value 0 is an invalid identifier.
`density`	Int: The desired screen density indicated by the resource as found in `android.util.DisplayMetrics`.
`theme`	Theme?: The theme used to style the drawable attributes, may be `null`.

Return
`Drawable?`	Drawable An object that can be used to draw this resource.

Exceptions
`NotFoundException`	Throws NotFoundException if the given ID does not exist.

getFloat

static fun getFloat(
    @NonNull res: Resources, 
    @DimenRes id: Int
): Float

Retrieve a floating-point value for a particular resource ID.

Parameters
`id`	Int