StringDef

@Target([AnnotationTarget.ANNOTATION_CLASS]) class StringDef
androidx.annotation.StringDef

Denotes that the annotated String element, represents a logical type and that its value should be one of the explicitly named constants.

Example: 

<code>
   @Retention(SOURCE)
   @StringDef({
      POWER_SERVICE,
      WINDOW_SERVICE,
      LAYOUT_INFLATER_SERVICE
   })
   public @interface ServiceName {}
   public static final String POWER_SERVICE = "power";
   public static final String WINDOW_SERVICE = "window";
   public static final String LAYOUT_INFLATER_SERVICE = "layout_inflater";
   ...
   public abstract Object getSystemService(@ServiceName String name);
  </code>

Summary

Public constructors
<init>(vararg value: String, open: Boolean)

Denotes that the annotated String element, represents a logical type and that its value should be one of the explicitly named constants.
Properties
Boolean

Whether any other values are allowed.
Array<String>

Defines the allowed constants for this element

Public constructors

<init>

StringDef(
    vararg value: String, 
    open: Boolean)

Denotes that the annotated String element, represents a logical type and that its value should be one of the explicitly named constants.

Example: 

<code>
   @Retention(SOURCE)
   @StringDef({
      POWER_SERVICE,
      WINDOW_SERVICE,
      LAYOUT_INFLATER_SERVICE
   })
   public @interface ServiceName {}
   public static final String POWER_SERVICE = "power";
   public static final String WINDOW_SERVICE = "window";
   public static final String LAYOUT_INFLATER_SERVICE = "layout_inflater";
   ...
   public abstract Object getSystemService(@ServiceName String name);
  </code>

Properties

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.

value

val value: Array<String>

Defines the allowed constants for this element