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Guillermo Garcia
745 PointsHelp with Extra Credit!
"Extra Credit Change the background color when the button is tapped
Add an ID to the RelativeLayout element in activity_main.xml. Then you can use that ID to get a RelativeLayout object just like we get a TextView and Button. The RelativeLayout object has a method called setBackgroundColor() that takes an int color code as a parameter. Use a color code from the Color class, i.e. Color.GREEN, and call this method when the button is clicked."
Okay so I was able to work this out, but now I want to challenge myself and take it to the next level. How do I make this same program, but randomizing the color? Meaning, not always change it to green?
Thanks!
1 Answer
Gergő Bogdán
6,664 PointsOne option would be to create an Array of Colors, where you'd add a couple of colors by default (5-6). The you would use the Random class from Java. This has a nextInt() method and can have a parameter which specifies the max value of the generated random number, for example:
Color[] colors= new Color[] { Color.GREEN, Color.RED};
Random rnd = new Random();
int randomNumber = rnd.nextInt(colors.length);
Color randomColor = colors[randomNumber];
Guillermo Garcia
745 PointsGuillermo Garcia
745 PointsHow do I call the array using the ".setBackgroundColor(?)"? And why do you initiate with "Color []" ? Can it be "int [] colors" instead?
Thank you