How to navigate to previous fragment without reloading in navigation component architecture

Question

I have Fragment A which loads some data when it opens. It has one button when we click. It navigate to Fragment B. That's not the issue, the problem is when I press back Button in Fragment B it comes to Fragment A and reload that data in Fragment A. My problem is I don't want to reload that data in Fragment A When back press From Fragment B.

Thanks in advance

Answer 1

I would suggest Dharmender's approach but if you are not using viewmodel then you can try this:

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        val tv1 = requireActivity().findViewById<TextView>(R.id.tv1)
        tv1.setOnClickListener {
            if(!isUpdated) {
                isUpdated = true
                requireActivity().supportFragmentManager.beginTransaction()
                    .replace((requireView().parent as ViewGroup).id, F2.newInstance())
                    .addToBackStack("f2").commit()
            }else{
                Toast.makeText(requireActivity(),"Already updated!", Toast.LENGTH_LONG).show()
            }
        }
    }

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate the layout for this fragment
        Log.e(TAG,"On create view")
        return inflater.inflate(R.layout.fragment_f1, container, false)
    }

    companion object {
        @JvmStatic
        fun newInstance() =
            F1()
        val TAG = F1::class.java.simpleName
        var isUpdated = false
    }

Here I am using one flag isUpdated.