Convert integer color value to RGB

Question

I am trying to modify a third party software. I want to use a color which is returned by some methods (which I cant modifiy) as an integer. However, I would like to use RGB format, like #FF00FF. How can I make a conversion?

Here is an HTML example http://www.shodor.org/stella2java/rgbint.html I would like to archive same thing in Java, on Android.

Answer 1

What I found to be the simplest and best solution for me was to directly use the Color class as follows:

int red = Color.red(intColor); int green = Color.green(intColor); int blue = Color.blue(intColor); int alpha = Color.alpha(intColor); 

This way I could already deal with the integer values without having to handle strings. If on the other hand the string representing the rgb color is what you need, Pankaj Kumar's answer is the best. I hope this is useful to someone.

Answer 2

Use this

String hexColor = String.format("#%06X", (0xFFFFFF & intColor)); 

We know lenght of color value in HEX is 6. So you see 6 here. %06X matches the result coming from (0xFFFFFF & intColor) and if length is less than 6, it makes result with 6 by appending ZERO to left side of result. And you see #, so this # char gets appended to result and finally you get a HEX COLOR value.

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Update since API 26

Since API 26, new methods Color.valueOf(....) has been introduced to convert colors for similar reason. you can use it like

// sRGB Color opaqueRed = Color.valueOf(0xffff0000); // from a color int Color translucentRed = Color.valueOf(1.0f, 0.0f, 0.0f, 0.5f);  // Wide gamut color ColorSpace sRgb = ColorSpace.get(ColorSpace.Named.SRGB); @ColorLong long p3 = Color.pack(1.0f, 1.0f, 0.0f, 1.0f, sRgb); Color opaqueYellow = Color.valueOf(p3); // from a color long  // CIE L*a*b* color space ColorSpace lab = ColorSpace.get(Named.CIE_LAB); Color green = Color.valueOf(100.0f, -128.0f, 128.0f, 1.0f, lab);  mView.setBackgroundColor(opaqueRed.toArgb()); mView2.setBackgroundColor(green.toArgb()); mView3.setBackgroundColor(translucentRed.toArgb()); mView4.setBackgroundColor(opaqueYellow.toArgb());