android.support.annotation - Android SDK | Android Developers
Android APIs
package

android.support.annotation

Annotations

AnimatorRes Denotes that an integer parameter, field or method return value is expected to be an animator resource reference (e.g. 
AnimRes Denotes that an integer parameter, field or method return value is expected to be an anim resource reference (e.g. 
AnyRes Denotes that an integer parameter, field or method return value is expected to be a resource reference of any type. 
ArrayRes Denotes that an integer parameter, field or method return value is expected to be an array resource reference (e.g. 
AttrRes Denotes that an integer parameter, field or method return value is expected to be an attribute reference (e.g. 
BinderThread Denotes that the annotated method should only be called on the binder thread. 
BoolRes Denotes that an integer parameter, field or method return value is expected to be a boolean resource reference. 
CallSuper Denotes that any overriding methods should invoke this method as well. 
CheckResult Denotes that the annotated method returns a result that it typically is an error to ignore. 
ColorInt Denotes that the annotated element represents a packed color int, AARRGGBB
ColorRes Denotes that an integer parameter, field or method return value is expected to be a color resource reference (e.g. 
DimenRes Denotes that an integer parameter, field or method return value is expected to be a dimension resource reference (e.g. 
DrawableRes Denotes that an integer parameter, field or method return value is expected to be a drawable resource reference (e.g. 
FloatRange Denotes that the annotated element should be a float or double in the given range

Example:

@FloatRange(from=0.0,to=1.0)
  public float getAlpha() {
      ...
  
 }
 
FractionRes Denotes that an integer parameter, field or method return value is expected to be a fraction resource reference. 
IdRes Denotes that an integer parameter, field or method return value is expected to be an id resource reference (e.g. 
IntDef Denotes that the annotated element of integer type, represents a logical type and that its value should be one of the explicitly named constants. 
IntegerRes Denotes that an integer parameter, field or method return value is expected to be an integer resource reference (e.g. 
InterpolatorRes Denotes that an integer parameter, field or method return value is expected to be an interpolator resource reference (e.g. 
IntRange Denotes that the annotated element should be an int or long in the given range

Example:

@IntRange(from=0,to=255)
  public int getAlpha() {
      ...
  
 }
 
Keep Denotes that the annotated element should not be removed when the code is minified at build time. 
LayoutRes Denotes that an integer parameter, field or method return value is expected to be a layout resource reference (e.g. 
MainThread Denotes that the annotated method should only be called on the main thread. 
MenuRes Denotes that an integer parameter, field or method return value is expected to be a menu resource reference. 
NonNull Denotes that a parameter, field or method return value can never be null. 
Nullable Denotes that a parameter, field or method return value can be null. 
PluralsRes Denotes that an integer parameter, field or method return value is expected to be a plurals resource reference. 
RawRes Denotes that an integer parameter, field or method return value is expected to be a raw resource reference. 
Size Denotes that the annotated element should have a given size or length. 
StringDef Denotes that the annotated String element, represents a logical type and that its value should be one of the explicitly named constants. 
StringRes Denotes that an integer parameter, field or method return value is expected to be a String resource reference (e.g. 
StyleableRes Denotes that an integer parameter, field or method return value is expected to be a styleable resource reference (e.g. 
StyleRes Denotes that an integer parameter, field or method return value is expected to be a style resource reference (e.g. 
TransitionRes Denotes that an integer parameter, field or method return value is expected to be a transition resource reference. 
UiThread Denotes that the annotated method or constructor should only be called on the UI thread. 
VisibleForTesting Denotes that the class, method or field has its visibility relaxed, so that it is more widely visible than otherwise necessary to make code testable. 
WorkerThread Denotes that the annotated method should only be called on a worker thread. 
XmlRes Denotes that an integer parameter, field or method return value is expected to be an XML resource reference.