Convert hex color value ( #ffffff ) to integer value

Question

I am receiving hex color values from a server (in this form, #xxxxxx , example #000000 for black)

How do I convert this to an integer value?

I tried doing Integer.valueOf("0x" + passedColor.substring(1, passedColor.length())) to get an even more hextastic 0x000000 result, but this isn't intepreted as an int here, any other suggestions?

I receive an error: 08-03 21:06:24.673: ERROR/AndroidRuntime(20231): java.lang.NumberFormatException: unable to parse '0x00C8FBFE' as integer

I am using the Android SDK for their setBackgroundColor(int color) function, which takes - as you might have guessed - an integer color value.

This is the OPPOSITE of this question: How to convert a color integer to a hex String in Android?

As for some reason I am unable to post... You're almost there, but you need the two-argument valueOf method, where you specify the string input (without the #, of course) and the radix, which specifies the base. Integer.valueOf(passedColor.substring(1, passedColor.length()), 16) This can be done with any integer base! download.oracle.com/javase/6/docs/api/java/lang/…, int) — ty1824
– ty1824, Commented Aug 4, 2011 at 1:10
Possible duplicate of How to get a Color from hexadecimal Color String — user2340612
– user2340612, Commented Mar 7, 2016 at 12:54

Karmic Coder · Accepted Answer · 2016-05-11 21:21:43Z

224

The real answer is to use:

Color.parseColor(myPassedColor) in Android, myPassedColor being the hex value like #000 or #000000 or #00000000.

However, this function does not support shorthand hex values such as #000.

edited May 11, 2016 at 21:21

Karmic Coder

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answered Jan 26, 2013 at 2:48

CQM

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3 Comments

Alex Semeniuk Over a year ago

Unfortunately in does not parse value like #000. See documentation

Kavita Patil Over a year ago

@CQM how to parse shorthand hex color, like #ccc. Is there any other way?

Damien Diehl Over a year ago

@KavitaPatil I haven't tested but it seems like your utility function could detect shorthand notation and then convert by duplicating each hex digit before passing to parseColor. See here: en.wikipedia.org/wiki/Web_colors#Shorthand_hexadecimal_form

Ashana.Jackol · Accepted Answer · 2017-06-16 06:22:25Z

Answer is really simple guys, in android if you want to convert hex color in to int, just use android Color class, example shown as below

this is for light gray color

Color.parseColor("#a8a8a8");

Thats it and you will get your result.

And just make it clear on how to use: someText.setTextColor(Color.parseColor("#f9e6ff") )

NobleUplift · Accepted Answer · 2024-02-06 00:52:16Z

16

long color = Long.parseLong(colorString.substring(1), 16); if (colorString.length() == 7) { // Set the alpha value color |= 0x00000000ff000000; } else if (colorString.length() != 9) { throw new IllegalArgumentException("Unknown color"); } return (int)color;

edited Feb 6, 2024 at 0:52

NobleUplift

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answered Aug 4, 2011 at 1:07

Mike Samuel

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7 Comments

CQM Over a year ago

thanks for the suggestion, I tried this just now to no avail, and it turns out an included Android function was the only kind of color result that works, even though they both return int. Color.parseColor(myPassedColor)) I didn't think this was an android specific problem, but turns out it was

Christian Chapman Over a year ago

I don't know why people upvoted this; it doesn't work!! The colors here are being stored in 32 bits so printing them makes them display as longs. parseInt looks for an explicit `-' to denote a negative, and doesn't respect the sign bit for ints or longs. Thus it will give the wrong number.

Mike Samuel Over a year ago

@enthdegree, To quote the OP, "I am receiving hex color values from a server (in this form, #xxxxxx" so the colors the OP deals with are 24 bits not 32 bits; there is no alpha channel.

Mike Samuel Over a year ago

@AllDayAmazing, '#' is not a hex digit, sign, or decimal separator so parseInt will fail if it finds it on the input.

AllDayAmazing Over a year ago

My mistake, I'm so ingrained in what I'm doing that I read it quickly and saw parseColor(). You are very correct.

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Fei · Accepted Answer · 2012-10-29 13:42:14Z

I have the same problem that I found some color in form of #AAAAAA and I want to conver that into a form that android could make use of. I found that you can just use 0xFFAAAAAA so that android could automatically tell the color. Notice the first FF is telling alpha value. Hope it helps

Milad Faridnia · Accepted Answer · 2016-12-14 06:43:27Z

5

The real answer is this simplest and easiest ....

String white = "#ffffff"; int whiteInt = Color.parseColor(white);

edited Dec 14, 2016 at 6:43

Milad Faridnia

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answered Dec 14, 2016 at 5:56

user7294802

Comments

ALEXANDER LOZANO · Accepted Answer · 2021-05-10 18:27:21Z

if you can pass the values as static const, you can convert the hex value to an Android (android.graphics.Color) using this online converter and put the color reference in the const, ie: color converter give me this value for this color #EE5670 = 0xFFEE5670.

static const Color redColor = const Color(0xFFEE5670);

https://convertingcolors.com/hex-color-EE5670.html?search=#EE5670

RunningWheels · Accepted Answer · 2014-04-17 14:12:20Z

I was facing the same problem. This way I was able to solved it. As CQM said, using Color.parseColor() is a good solution to this issue.

Here is the code I used:

this.Button_C.setTextColor(Color.parseColor(prefs.getString("color_prefs", String.valueOf(R.color.green))));

In this case my target was to change the Button's text color (Button_C) when I change the color selection from my Preferences (color_prefs).

MikeL · Accepted Answer · 2019-02-28 13:22:01Z

Based on CQM's answer and on ovokerie-ogbeta's answer to another question I've come up with this solution:

if (colorAsString.length() == 4) { // #XXX colorAsString = colorAsString.replaceAll("#([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])", "#$1$1$2$2$3$3"); } int color = Color.parseColor(colorAsString);

B. Go · Accepted Answer · 2019-12-03 19:22:11Z

Get Shared Preferences Color Code in String then Convert to integer and add layout-background color:

 sharedPreferences = getSharedPreferences(mypref, Context.MODE_PRIVATE); String sw=sharedPreferences.getString(name, ""); relativeLayout.setBackgroundColor(Color.parseColor(sw));

Gaston Cufre · Accepted Answer · 2017-01-27 21:48:50Z

Try this, create drawable in your resource...

<shape xmlns:android="http://schemas.android.com/apk/res/android" > <solid android:color="@color/white"/> <size android:height="20dp" android:width="20dp"/> </shape>

then use...

 Drawable mDrawable = getActivity().getResources().getDrawable(R.drawable.bg_rectangle_multicolor); mDrawable.setColorFilter(Color.parseColor(color), PorterDuff.Mode.SRC_IN); mView1.setBackground(mDrawable);

with color... "#FFFFFF"

if the color is transparent use... setAlpha

mView1.setAlpha(x); with x float 0-1 Ej (0.9f)

Good Luck

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