Resources

All @XXXRes annotations indicate that an activity field should be injected with the corresponding Android resource from your res folder. The resource id can be set in the annotation parameter, ie @StringRes(R.string.hello).

If the resource id is not set, the name of the field will be used. The field must not be private.

@StringRes

The @StringRes annotation can be used to retrieve string resources.

Usage example:

@StringRes(R.string.hello)
String myHelloString;

@StringRes
String hello;

Equivalent boilerplate code:

String myHelloString;

String hello;

@Override
public void onCreate(Bundle savedInstanceState) {
    [...]
    myHelloString = getString(R.string.hello);
    hello = getString(R.string.hello);
}

@ColorRes

The @ColorRes annotation can be used to retrieve color resources.

Usage example:

@ColorRes(R.color.backgroundColor)
int someColor;

@ColorRes
int backgroundColor;

Equivalent boilerplate code:

int someColor;

int backgroundColor;

@Override
public void onCreate(Bundle savedInstanceState) {
    [...]
    Resources resources = getResources();
    someColor = resources.getColor(R.color.backgroundColor);
    backgroundColor = resources.getColor(R.color.backgroundColor);
}

@AnimationRes

@AnimationRes can be used to inject XmlResourceParser fields (not very useful) or Animation fields (much more interesting).

Usage example:

@AnimationRes(R.anim.fadein)
XmlResourceParser xmlResAnim;
    
@AnimationRes
Animation fadein;

Equivalent boilerplate code:

XmlResourceParser xmlResAnim;
    
Animation fadein;

@Override
public void onCreate(Bundle savedInstanceState) {
    [...]
    fadein = AnimationUtils.loadAnimation(this, R.anim.fadein);
    Resources resources = getResources();
    xmlResAnim = resources.getAnimation(R.anim.fadein);
}

Other @XXXRes

Here is the list of other supported resource annotations:

• @BooleanRes
• @ColorStateListRes
• @DimensionRes
• @DimensionPixelOffsetRes
• @DimensionPixelSizeRes
• @DrawableRes
• @IntArrayRes
• @IntegerRes
• @LayoutRes
• @MovieRes
• @TextRes
• @TextArrayRes
• @StringArrayRes