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 | |
|---|---|
|
Denotes that the annotated long element represents a logical type and that its value should be one of the explicitly named constants. |
|
| Properties | |
|---|---|
| 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.