Convert RGB Color to HEX color

问题

I am taking a color from an ImageView using OnTouchListener.

Red, Green, Blue color code can be successfully obtained, but i cant convert RGB to HEX ..

example : my rgb values are
r:21

b:16

g:228

and curresponding hex color is #15e410.

i want get #15e410. from r:21 ,b:16 ,g:228

                int pixel = bitmap.getPixel(x,y);             
                int redValue = Color.red(pixel);
                int blueValue = Color.blue(pixel);
                int greenValue = Color.green(pixel);

                int hexa=  Color.rgb(redValue, greenValue, blueValue);


                Toast.makeText(getApplicationContext(),"hexa ::"+hexa ,Toast.LENGTH_LONG).show();

回答1:

Solution:

Just use:

String hex = String.format("#%02x%02x%02x", redValue, greenValue, blueValue);

This will convert all the Red, Green and Blue values to Hex String.

Hope it helps.

回答2:

Use Integer.toHexString(color); to convert an integer to hex string.

Example:

int color = 0xff334433;
String hex = Integer.toHexString(color);
System.out.println(hex); // this prints - ff334433

回答3:

You are sending wrong the parameters to the function String.format to get the hexColor.

Try this one:

String hexColor = String.format("#%06X", redValued, greenValue, blueValue);

来源：https://stackoverflow.com/questions/52148457/convert-rgb-color-to-hex-color