Save selected item and position

[KaeruShi]

Save selected item and position

[devAseemSharma]

There are multiple ways, it can be done in one of the callbacks, you will need to add the unique identifier of the selected item (needs to be the field of your Model) in the preference and then later extract it, given this item's list is already stored somewhere.

Another way is to use some kind of Json parser framework like Gson or Moshi to convert the model to jsontString save that string and then when you read that string from preference convert it back to your model.

For this example I am putting all the selected items in listItemSelected ArrayList you can use this list to store it in preference.

In this example there is a interface callback which is provided to rvSelectedSetting touchHelper look for the following code:

 override fun onDrag(v: View?, event: DragEvent): Boolean {
        val state = event.localState as DragData
        when (event.action) {
            DragEvent.ACTION_DRAG_ENTERED -> {
                binding.rvSelectedSetting.setBackgroundResource(R.drawable.green_dashed_box)
            }
            DragEvent.ACTION_DRAG_EXITED -> {
                binding.rvSelectedSetting.setBackgroundResource(R.drawable.dashed_box)
            }
            DragEvent.ACTION_DRAG_ENDED -> {
                binding.rvSelectedSetting.setBackgroundResource(R.drawable.dashed_box)
            }
            DragEvent.ACTION_DROP -> {
                if (listItemSelected.find { it.id == state.item.id } != null) {
                    Toast.makeText(MainActivity@ this, "Setting already exists!", Toast.LENGTH_LONG)
                        .show()
                    return true
                }
  
                listItemSelected.add(0, state.item) // All the selected items getting stored in this list. 
                selectedSettingAdapter.notifyItemRangeInserted(0, 1)
            }
            else -> {}
        }
        return true
    }