CODEWITHSUNDEEP
flutterdart
user6852826
user6852826

Reputation:

How to generate a random values between two hexcode in flutter

I am trying to generate a list of hexcode between two values so I can use then to generate a range of colors.

What I am trying to achieve is this.

List.generate(36, (i) => generateRandomCode(0xFF0587D8, 0xFF0345B5))

generateRandomCode(min, max) {
    // implementation here
}

How do I generate this int in the function generateRandomCode?

Upvotes: 1

Views: 1876

Answers (3)

Crazy Lazy Cat
Crazy Lazy Cat

Reputation: 15103

Generator:

int generateRandomCode(int minValue, int maxValue) {
  return Random().nextInt((maxValue - minValue).abs() + 1) + min(minValue, maxValue);
}

Usage:

final list = List<int>.generate(36, (i) => generateRandomCode(0xFF0587D8, 0xFF0345B5));
print(list);

Result:

/flutter ( 6592): [4278422613, 4278508577, 4278489065, 4278486019, 4278499653, 4278480654, 4278464106, 4278474805, 4278462976, 4278549386, 4278537465, 4278418510, 4278496777, 4278405225, 4278411018, 4278412393, 4278461314, 4278538568, 4278549901, 4278510124, 4278492024, 4278530862, 4278517728, 4278425917, 4278442865, 4278497051, 4278430858, 4278497227, 4278462764, 4278412600, 4278448684, 4278422213, 4278464891, 4278473256, 4278543371, 4278476016]

You can still convert it to list of colors

final colorList = list.map((hex) => Color(hex)).toList();
print(colorList);

Result:

I/flutter ( 6592): [Color(0xff04c366), Color(0xff03d608), Color(0xff03a34a), Color(0xff048eac), Color(0xff03924a), Color(0xff03f0ba), Color(0xff052271), Color(0xff03ef8a), Color(0xff0582e0), Color(0xff0551ae), Color(0xff0402b3), Color(0xff0552be), Color(0xff050553), Color(0xff04c39f), Color(0xff053f88), Color(0xff04b6b8), Color(0xff05299f), Color(0xff03f1a7), Color(0xff03ca2f), Color(0xff04a864), Color(0xff04ee66), Color(0xff0358ce), Color(0xff03b741), Color(0xff046785), Color(0xff04ef11), Color(0xff04e618), Color(0xff03ff8a), Color(0xff03dc97), Color(0xff04353e), Color(0xff04cff6), Color(0xff03bfa4), Color(0xff049ca3), Color(0xff04bbac), Color(0xff03c5d3), Color(0xff05730b), Color(0xff036c8f)]

Upvotes: 2

ibrahimkarahan
ibrahimkarahan

Reputation: 3015

  List<int> createList(int min, int max) {
    return List.generate(max - min + 1, (i) => min + i);
  }

Result: 

print(">>>>>>>>>> ${createList(10, 22).join(", ")}");
// >>>>>>>>>> 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22

Upvotes: 1

Sai Krishnadas
Sai Krishnadas

Reputation: 3419

Use a List Generate Constructor

new List<int>.generate(3, (int index) => index * index);

Link to the source : Link generator

Upvotes: 1

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