Int RGB to HEX values

Question

Hi guys so basically im building an android application that can display colour information with use of the camera. currently the app is getting pixel information and displaying RGB values in a textview. I would like to expand it and add a textview that can show HEX values but im unsure how to convert it and display it. pretty sure I need to make changes below...

public void pix(){
        operation= Bitmap.createBitmap(bmp.getWidth(),
                bmp.getHeight(),bmp.getConfig());

        int height = bmp.getHeight();
        int width = bmp.getWidth();
        int p = bmp.getPixel(height / 2, width / 2);

        int r = Color.red(p);
        int g = Color.green(p);
        int b = Color.blue(p);

       // Toast.makeText(this, String.valueOf(r) + String.valueOf(g) + String.valueOf(b), Toast.LENGTH_LONG).show();
        colourbbox1.setText( String.valueOf(r) + String.valueOf(g) + String.valueOf(b));

        colourbbox2.setText( String.valueOf(r) + String.valueOf(g) + String.valueOf(b));

colorbbox2 is the intended textview. Any help would be much appreciated.

(still a java novice FYI)

Also you can use, `colourbbox2.setText(String.format("#%02x%02x%02x", r, g, b));` — user370305, Apr 10 '15 at 18:56

score 1 · Answer 1 · answered Apr 10 '15 at 18:53

1

You can use Integer.toHexString() :

colourbbox2.setText(Integer.toHexString(r) + Integer.toHexString(g) + Integer.toHexString(b));

answered Apr 10 '15 at 18:53

Rod

754
11
21

score 0 · Answer 2 · answered Apr 10 '15 at 18:56

0

Try: String hexColor = String.format( "#%02x%02x%02x", r, g, b );

answered Apr 10 '15 at 18:56

Jemshit

9,501
5
69
106

score 0 · Accepted Answer · answered Apr 10 '15 at 18:56

0

Convert the int values into hexadecimal representations:

String hexadecimal = String.format("#%02X%02X%02X", r, g, b);

Add to your TextView:

colourbbox2.setText(hexadecimal);

answered Apr 10 '15 at 18:56

CzarMatt

1,773
18
22

This worked perfectly thank you, may I ask why its formatted like "%02x%02x%02x" this ? I suppose something similar will work for HSV conversion ? – leo666 Apr 10 '15 at 19:16

Int RGB to HEX values

3 Answers3