Personalised notes for Tossit App

1. • ViewModel in Android with Kotlin DSL:

     • Define a ViewModel class:

        kotlinCopy code// SharedViewModel.kt
        package com.example.tossit
       
        import androidx.lifecycle.ViewModel
       
        class SharedViewModel : ViewModel() {
            var inputValue: Int = 0
        }
       

       • Use ViewModelProvider to obtain an instance in a Fragment:

        kotlinCopy code// YourFragment.kt
        viewModel = ViewModelProvider(requireActivity()).get(SharedViewModel::class.java)

2 -> Generating Distinct Random Numbers in Kotlin:

• Use the Fisher-Yates shuffle algorithm to generate distinct random numbers:

    kotlinCopy code// ResultMultiPlayerFragment.kt
    private fun generateDistinctRandomNumbers(maxValue: Int): List<Int> {
        val numbers = (1..maxValue).toMutableList()
        for (i in numbers.size - 1 downTo 1) {
            val j = Random.Default.nextInt(i + 1)
            val temp = numbers[i]
            numbers[i] = numbers[j]
            numbers[j] = temp
        }
        return numbers
    }
  

Certainly! Let's go through each point with corresponding code snippets:

1. ViewModel in Android with Kotlin DSL:

   • Define a ViewModel class:

       kotlinCopy code// SharedViewModel.kt
       package com.example.tossit
     
       import androidx.lifecycle.ViewModel
     
       class SharedViewModel : ViewModel() {
           var inputValue: Int = 0
       }
     

     • Use ViewModelProvider to obtain an instance in a Fragment:

                    kotlinCopy code// YourFragment.kt
                    viewModel = ViewModelProvider(requireActivity()).get(SharedViewModel::class.java)

1. Fragment Communication and Navigation in Android:

   • Navigate between fragments using the Navigation component:

       kotlinCopy code// YourFragment.kt
       nextButton.setOnClickListener { view : View ->
           Navigation.findNavController(view).navigate(R.id.action_MultiPlayerFragment_to_resultMultiPlayerFragment)
       }
     

2. Generating Distinct Random Numbers in Kotlin:

   • Use the Fisher-Yates shuffle algorithm to generate distinct random numbers:

       kotlinCopy code// ResultMultiPlayerFragment.kt
       private fun generateDistinctRandomNumbers(maxValue: Int): List<Int> {
           val numbers = (1..maxValue).toMutableList()
           for (i in numbers.size - 1 downTo 1) {
               val j = Random.Default.nextInt(i + 1)
               val temp = numbers[i]
               numbers[i] = numbers[j]
               numbers[j] = temp
           }
           return numbers
       }
     

3. Using Random.Default in Kotlin:

   • Generate a random integer using Random.Default.nextInt():

       kotlinCopy code// ResultMultiPlayerFragment.kt
       val randomInt = Random.Default.nextInt(1, 3)
     

     5 -> Android Toast Messages:

     • Display a Toast message:

         kotlinCopy code// YourFragment.kt
         Toast.makeText(requireContext(), "Coin Tossed", Toast.LENGTH_SHORT).sho