how to convert rgb color to int in java

Question

Paint setColor is expecting an integer  But what I have is a Color object  I don t see a color getIntValue   in Java  So how do I do that  What I want is something like  public Something myMethod Color rgb       myPaint setColor rgb getIntValue                 Correction  android graphics Color  I thought having android as one of the tags would be enough  But apparently not

User · Answer

Use getRGB    it helps   no complicated programs       Returns an array of integer pixels in the default RGB color model    TYPE INT ARGB  and default sRGB color space  from a portion of the   image data

User · Answer

If you are developing for Android  Color s method for this is rgb int  int  int    So you would do something like  myPaint setColor Color rgb int  int  int       For retrieving the individual color values you can use the methods for doing so    Color red int color   Color blue int color   Color green int color     Refer to this document for more info

User · Answer

First of all  android graphics Color is a class thats composed of only static methods  How and why did you create a new android graphics Color object   This is completely useless and the object itself stores no data   But anyways    I m going to assume your using some object that actually stores data     A integer is composed of 4 bytes  in java   Looking at the function getRGB   from the standard java Color object we can see java maps each color to one byte of the integer in the order ARGB  Alpha-Red-Green-Blue   We can replicate this behavior with a custom method as follows   public int getIntFromColor int Red  int Green  int Blue       Red    Red  lt  lt  16   amp  0x00FF0000    Shift red 16-bits and mask out other stuff     Green    Green  lt  lt  8   amp  0x0000FF00    Shift Green 8-bits and mask out other stuff     Blue   Blue  amp  0x000000FF    Mask out anything not blue       return 0xFF000000   Red   Green   Blue    0xFF000000 for 100  Alpha  Bitwise OR everything together      This assumes you can somehow retrieve the individual red  green and blue colour components and that all the values you passed in for the colours are 0-255   If your RGB values are in form of a float percentage between 0 and 1 consider the following method   public int getIntFromColor float Red  float Green  float Blue       int R   Math round 255   Red       int G   Math round 255   Green       int B   Math round 255   Blue        R    R  lt  lt  16   amp  0x00FF0000      G    G  lt  lt  8   amp  0x0000FF00      B   B  amp  0x000000FF       return 0xFF000000   R   G   B      As others have stated  if you re using a standard java object  just use getRGB     If you decide to use the android color class properly you can also do   int RGB   android graphics Color argb 255  Red  Green  Blue     Where Red  Green  Blue are the RGB components  The number 255 is for 100  Alpha   or  int RGB   android graphics Color rgb Red  Green  Blue     Where Red  Green  Blue are the RGB components    as others have stated     Second function assumes 100  alpha   Both methods basically do the same thing as the first method created above

User · Answer

Color has a getRGB   method that returns the color as an int

User · Answer

int color    A  amp  0xff   lt  lt  24    R  amp  0xff   lt  lt  16    G  amp  0xff   lt  lt  8    B  amp  0xff

User · Answer

Try this one   Color color   new Color  10 10 10    myPaint setColor color getRGB

User · Answer

You may declare a value in color xml  and thus you can get integer value by calling the code below   context getColor int resId

User · Answer

You want to use intvalue   Color parseColor       colorobject

[java] how to convert rgb color to int in java

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