How to set random color

Question

this is an extract of my code:

Color[] color = new Color[3];
color [0] = Color.red;
color[1] = Color.blue;
color[2] = Color.yellow;
stage.getBatch().setColor(color[rand.nextInt()]);

But "color[rand.nextInt()]);" is underlined red. I really don´t know why. There have to be four numbers or instead "Color.BLUE" for example in the brackets but I want to tint the sprite randomly. Therefore I created an array with three colors. I thought by just giving them numbers and using rand.nextInt it would work. What is the mistake?

this will be helpful to you : https://stackoverflow.com/questions/40284802/how-to-output-a-random-color-from-a-set-of-selected-colors-in-java-android/40373178#40373178 — Akash Patel, Jul 26 '17 at 10:46
What is the actual compiler error message given for the code underlined red? — JK Ly, Jul 26 '17 at 10:47
Error message: "Cannot resolve method 'setColor (java.awt.Color)' — user8340536, Jul 26 '17 at 10:52

score 5 · Accepted Answer · answered Jul 26 '17 at 10:47

5

You can generate random colors like this:

Random rnd = new Random(); 
int color = Color.argb(255, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256));

answered Jul 26 '17 at 10:47

Ayush Khare

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If I write your code in Android Studio, argb is red, so there's an error – user8340536 Jul 26 '17 at 11:01
https://stackoverflow.com/a/4246418/5354875 Quite the simplest way possible to do it! Also see this answer, it makes you capable of choosing only bright or dark colors when getting random ones. – koksalb Jul 26 '17 at 11:02
I discovered the error: it has to be argb8888. But how can I change the color of a sprite randomly with this code? – user8340536 Jul 26 '17 at 11:09
What is sprite? Is it a view? – Ayush Khare Jul 26 '17 at 11:11
Yes, it´s a view. I changed the color of the sprite randomly by tapping on the screen. However, I want to implement a timer for changing the colors. Does anyone know how to do that? – user8340536 Jul 26 '17 at 11:20
Please post another question, or edit your question according to your new requirements – Ayush Khare Jul 26 '17 at 11:23
Okay. Another question related to this topic: how can I exclude the colors black and white with your code? – user8340536 Jul 26 '17 at 11:28
You can look at the ARGB hex values and exclude white and black by putting a check – Ayush Khare Jul 26 '17 at 11:30
What do you exactly mean with "putting a check"? – user8340536 Jul 26 '17 at 11:36

score 1 · Answer 2 · answered Jul 26 '17 at 11:01

Given the error message Error message: "Cannot resolve method 'setColor (java.awt.Color)' it looks like you are using the wrong Color class for Libgdx's SpriteBatch.

You need to change your import to com.badlogic.gdx.graphics.Color

Also, to correctly randomly select from your 3 colors, you need to use rand.nextInt(color.length) to bound the randomly generated int to the number of elements in your array.

score 0 · Answer 3 · answered Mar 25 '19 at 09:54

0

Have a look at this Semi-random approach that make more shiny and fresh colors.

answered Mar 25 '19 at 09:54

ucMedia

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How to set random color

3 Answers3