How can I get color-int from color resource

Question

Is there any way to get a color-int from a color resource  I am trying to get the individual red  blue and green components of a color defined in the resource  R color myColor  so that I can set the values of three seekbars to a specific level

User · Answer

Found an easier way that works as well   Color parseColor getString R color idname

User · Answer

Best Approach  As  sat answer  good approach for getting color is  ResourcesCompat getColor getResources    R color your color  null     or use below way when you don t have access to getResources   method   Context context    getContext       like Dialog class ResourcesCompat getColor context getResources    R color your color  null     What i do is  public void someMethod                ResourcesCompat getColor App getRes    R color your color  null       It is most simple to use anywhere in your app  Even in Util class or any class where you don t have Context or getResource    Problem  When you don t have Context   When you don t have Context access  like a method in your Util class   Assume below method without Context   public void someMethod                   can t use getResource   without Context      Now you will pass Context as a parameter in this method and use getResources     public void someMethod Context context               context getResources        So here is a Bonus unique solution by which you can access resources from anywhere like Util class   Add Resources to your Application class or Create one if does not exist   import android app Application  import android content res Resources   public class App extends Application       private static App mInstance      private static Resources res         Override     public void onCreate             super onCreate            mInstance   this          res   getResources               public static App getInstance             return mInstance             public static Resources getResourses             return res             Add name field to your manifest xml  lt application tag   If not added already    lt application         android name   App                       gt                   lt  application gt    Now you are good to go  Use ResourcesCompat getColor App getRes    R color your color  null   anywhere in app

User · Answer

ContextCompat getColor context  R color your color     in activity   ContextCompat getColor actvityname this  R color your color     in fragment  ContextCompat getColor getActivity    R color your color     for example   tvsun settextcolour ContextCompat getColor getActivity    R color your color

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Accessing colors from a non-activity class can be difficult  One of the alternatives that I found was using enum  enum offers a lot of flexibility   public enum Colors     COLOR0 0x26  0x32  0x38         R  G  B   COLOR1 0xD8  0x1B  0x60     COLOR2 0xFF  0xFF  0x72     COLOR3 0x64  0xDD  0x17       private final int R    private final int G    private final int B     Colors final int R  final int G  final int B          this R   R      this G   G      this B   B         public int getColor           return  R  amp  0xff   lt  lt  16    G  amp  0xff   lt  lt  8    B  amp  0xff          public int getR           return R         public int getG           return G         public int getB           return B

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Define your color  values color xml   lt  xml version  1 0  encoding  utf-8   gt   lt resources gt        lt  -- color int as  AARRGGBB  alpha  red  green  blue  -- gt       lt color name  orange  gt  fff3632b lt  color gt               lt color name  my view color  gt  color orange lt  color gt    lt  resources gt    Get the color int and set it  int backgroundColor   ContextCompat getColor context  R color my view color      Color backgroundColor        Don t do this  The color is just an int    myView setBackgroundColor backgroundColor     See also   How to set background color of a View Color docs Color Style Design docs

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If your current min  API level is 23  you can simply use getColor   like we are using for getString       example textView setTextColor getColor R color green       if context is not available ex  not in activity  use with context getColor     If you want below API level 23  just use this   textView setTextColor getResources   getColor R color green      But note that getResources   getColor   is deprecated in API Level 23  In that case replace above with   textView setTextColor ContextCompat getColor this   context    R color green     Im in an activity  so I can use  this    ContextCompat  Helper for accessing features in Context  If You want  you can constraint with SDK INT like below   if  Build VERSION SDK INT  gt   Build VERSION CODES M        textView setTextColor getColor R color green      else       textView setTextColor getResources   getColor R color green

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or if you have a function string text string color  and you need to pass the Resource Color String you can do as follow String valueOf getResources   getColor R color enurse link color

User · Answer

For more information on another use-case that may help surface this question in search results  I wanted to apply alpha to a color defined in my resources   Using  sat s correct answer   int alpha          0-255  calculated based on some business logic int actionBarBackground   getResources   getColor R color actionBarBackground   int actionBarBackgroundWithAlpha   Color argb          alpha          Color red actionbarBackground           Color green actionbarBackground           Color blue actionbarBackground

User · Answer

You can use   getResources   getColor R color idname     Check here on how to define custom colors   http   sree cc google android defining-custom-colors-using-xml-in-android  EDIT 1   Since getColor int id  is deprecated now  this must be used    ContextCompat getColor context  R color your color      added in support library 23   EDIT 2    Below code can be used for both pre and post Marshmallow  API 23   ResourcesCompat getColor getResources    R color your color  null     without theme  ResourcesCompat getColor getResources    R color your color  your theme     with theme

User · Answer

Most Recent working method   getColor R color snackBarAction

User · Answer

I updated to use ContextCompat getColor context  R color your color   but sometimes  On some devices Android versions  I m not sure  that causes a NullPointerExcepiton   So to make it work on all devices versions  I fall back on the old way of doing it  in the case of a null pointer   try       textView setTextColor ContextCompat getColor getActivity    R color text grey dark      catch NullPointerException e        if Build VERSION SDK INT  gt   Build VERSION CODES M            textView setTextColor getContext   getColor R color text grey dark              else           textView setTextColor getResources   getColor R color text grey dark

User · Answer

Based on the new Android Support Library  and this update   now you should call   ContextCompat getColor context  R color name color     According to the documentation   public int getColor  int id    This method was deprecated in API level 23  Use getColor int  Theme  instead  It is the same solution for getResources   getColorStateList id    You have to change it like this    ContextCompat getColorStateList getContext   id     EDIT 2019  Regarding ThemeOverlay use the context of the closest view   val color   ContextCompat getColor    closestView context    R color name color     So this way you get the right color based on your ThemeOverlay    Specially needed when in same activity you use different themes  like dark light theme  If you would like to understand more about Themes and Styles this talk is suggested  Developing Themes with Style

[android] How can I get color-int from color resource?

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