How to access a function ,written in a fragment, in an activity-CodePudding

I have created a function in a fragment that gets data from the fragment's UI. I would want to access it in my main Activity so as to store the data in cloud firestore

This is the function in the fragment override fun onViewCreated(view: View, savedInstanceState: Bundle?) { super.onViewCreated(view, savedInstanceState)

    fun getData(){
        var dairyMealStock: Int = view?.findViewById<EditText>(R.id.et_dairy_meal_stock)?.text.toString().toInt()
        var dairyMealDuration: Int = view?.findViewById<EditText>(R.id.et_dairy_meal_used)?.text.toString().toInt()
        var maizeCharmStock: Int = view?.findViewById<EditText>(R.id.et_maize_charm_stock)?.text.toString().toInt()
        var maizeCharmDuration: Int = view?.findViewById<EditText>(R.id.et_maize_charm_used)?.text.toString().toInt()
        var wheatBrandStock: Int = view?.findViewById<EditText>(R.id.et_wheat_brand_stock)?.text.toString().toInt()
        var wheatBrandDuration: Int = view?.findViewById<EditText>(R.id.et_wheat_brand_used)?.text.toString().toInt()
        var maizeBrandStock: Int = view?.findViewById<EditText>(R.id.et_maize_brand_stock)?.text.toString().toInt()
        var maizeBrandDuration: Int = view?.findViewById<EditText>(R.id.et_maize_brand_used)?.text.toString().toInt()
        var cottonCakeStock: Int = view?.findViewById<EditText>(R.id.et_cotton_cake_stock)?.text.toString().toInt()
        var cottonCakeDuration : Int = view?.findViewById<EditText>(R.id.et_cotton_cake_used)?.text.toString().toInt()
        var pyrethrumStock: Int = view?.findViewById<EditText>(R.id.et_pyrethrum_stock)?.text.toString().toInt()
        var pyrethrumDuration: Int = view?.findViewById<EditText>(R.id.et_pyrethrum_used)?.text.toString().toInt()
        var dcpStock: Int = view?.findViewById<EditText>(R.id.et_D_C_P_stock)?.text.toString().toInt()
        var dcpDuration: Int = view?.findViewById<EditText>(R.id.et_D_C_P_duration)?.text.toString().toInt()
        var blockStock: Int = view?.findViewById<EditText>(R.id.et_block_stock)?.text.toString().toInt()
        var blockDuration: Int = view?.findViewById<EditText>(R.id.et_Block_duration)?.text.toString().toInt()
        var jotoStock: Int = view?.findViewById<EditText>(R.id.et_joto_stock)?.text.toString().toInt()
        var jotoDuration: Int = view?.findViewById<EditText>(R.id.et_joto_duration)?.text.toString().toInt()
        var yaMaziwaStock: Int =view?.findViewById<EditText>(R.id.et_ya_maziwa_stock)?.text.toString().toInt()
        var yaMaziwaDuration: Int = view?.findViewById<EditText>(R.id.et_ya_maziwa_duration)?.text.toString().toInt()
        var allPurposeStock: Int = view?.findViewById<EditText>(R.id.et_all_purpose_stock)?.text.toString().toInt()
        var allPurposeDuration: Int = view?.findViewById<EditText>(R.id.et_all_purpose_duration)?.text.toString().toInt()
    }
}

CodePudding user response：

You have to use an interface to do that ..

first define an interface

interface PassingDataCallback{
fun passData(str:String)
}

2 . Override onAttach in your fragment and then define your callback function

for eg

callback = when {
activity is MainActivity -> {
activity as MainActivity
}
context is MainActivity -> {
context
}

else -> {
throw RuntimeException ("Activity must implement callback");
}
}

implement this callback in your activity and override the methods. Use what you need with that data

CodePudding user response：

You can use an activityViewModel and store the data there. That way both activity and fragment will have access to the same data.