LongDef
@Target([AnnotationTarget.ANNOTATION_CLASS]) class LongDef
androidx.annotation.LongDef |
Denotes that the annotated long element represents a logical type and that its value should be one of the explicitly named constants. If the LongDef#flag() attribute is set to true, multiple constants can be combined.
Example:
<code> @Retention(SOURCE) @LongDef({NAVIGATION_MODE_STANDARD, NAVIGATION_MODE_LIST, NAVIGATION_MODE_TABS}) public @interface NavigationMode {} public static final long NAVIGATION_MODE_STANDARD = 0; public static final long NAVIGATION_MODE_LIST = 1; public static final long NAVIGATION_MODE_TABS = 2; ... public abstract void setNavigationMode(@NavigationMode long mode); @NavigationMode public abstract long getNavigationMode(); </code>For a flag, set the flag attribute:
<code> @LongDef( flag = true, value = {NAVIGATION_MODE_STANDARD, NAVIGATION_MODE_LIST, NAVIGATION_MODE_TABS}) </code>
Summary
Public constructors | |
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Denotes that the annotated long element represents a logical type and that its value should be one of the explicitly named constants. |
Properties | |
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Boolean |
Defines whether the constants can be used as a flag, or just as an enum (the default) |
Boolean |
Whether any other values are allowed. |
LongArray |
Defines the allowed constants for this element |
Public constructors
<init>
LongDef(
vararg value: Long,
flag: Boolean,
open: Boolean)
Denotes that the annotated long element represents a logical type and that its value should be one of the explicitly named constants. If the LongDef#flag() attribute is set to true, multiple constants can be combined.
Example:
<code> @Retention(SOURCE) @LongDef({NAVIGATION_MODE_STANDARD, NAVIGATION_MODE_LIST, NAVIGATION_MODE_TABS}) public @interface NavigationMode {} public static final long NAVIGATION_MODE_STANDARD = 0; public static final long NAVIGATION_MODE_LIST = 1; public static final long NAVIGATION_MODE_TABS = 2; ... public abstract void setNavigationMode(@NavigationMode long mode); @NavigationMode public abstract long getNavigationMode(); </code>For a flag, set the flag attribute:
<code> @LongDef( flag = true, value = {NAVIGATION_MODE_STANDARD, NAVIGATION_MODE_LIST, NAVIGATION_MODE_TABS}) </code>
See Also
Properties
flag
val flag: Boolean
Defines whether the constants can be used as a flag, or just as an enum (the default)
open
val open: Boolean
Whether any other values are allowed. Normally this is not the case, but this allows you to specify a set of expected constants, which helps code completion in the IDE and documentation generation and so on, but without flagging compilation warnings if other values are specified.