hamurcuabi

class SharedViewModel() : ViewModel() {

    var data: String = "SharedViewModel Data"
        private set

}

hamurcuabi

class FragmentA : Fragment() {
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        //Observe the result to be set by Fragment B in the stateHandle of the currentBackStackEntry
        val currentBackStackEntry = findNavController().currentBackStackEntry
        val savedStateHandle = currentBackStackEntry?.savedStateHandle
        savedStateHandle?.getLiveData<String>(RESULT_FROM_FRAGMENT_B)
            ?.observe(currentBackStackEntry, Observer { result ->
                print(result)

hamurcuabi

private fun getPermissionState(activity: Activity, result: Map<String, Boolean>): PermissionState {
    val deniedPermissions = result.filterValues { !it }.keys

    return when {
        deniedPermissions.isEmpty() -> PermissionState.Granted
        deniedPermissions.any { permission ->
            !shouldShowRequestPermissionRationale(
                /* activity = */
                activity,
                /* permission = */

hamurcuabi

import android.os.Bundle
import android.widget.ProgressBar
import android.widget.TextView
import androidx.activity.viewModels
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.isVisible

class MainActivity : AppCompatActivity() {

    private val mainViewModel: MainViewModel by viewModels()

hamurcuabi

  val user = User()
        val userValidator = Validator(user).apply {
            addRule("Name Cannot be empty") { it?.name.isNullOrEmpty() }
            addRule("Username lenght min 5 character") { it?.name?.length < 5 }
            addRule("Email cannot be empty") { it?.email.isNullOrEmpty() }
            addRule("Email format is wrong") { it?.email.isValidEmail() }
            addRule("Age min 18") { it?.age < 18 }
        }

hamurcuabi

package com.hamurcuabi.myapplication

import android.content.Context
import android.graphics.Typeface
import android.util.AttributeSet
import android.view.LayoutInflater
import android.view.View
import android.widget.FrameLayout
import androidx.core.view.isVisible
import com.hamurcuabi.myapplication.databinding.ViewCustomToolbarBinding

hamurcuabi

class OnBackPressedDelegationImpl : OnBackPressedDelegation, DefaultLifecycleObserver {

    private val onBackPressedCallback = object : OnBackPressedCallback(true) {
        override fun handleOnBackPressed() {
            onBackPressed.invoke()
        }
    }

    private var fragmentActivity: FragmentActivity? = null

hamurcuabi

class HomeFragment : Fragment(), 
OnBackPressedDelegation by OnBackPressedDelegationImpl() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        registerOnBackPressedDelegation(activity, this.lifecycle) {
            // OnBackPressed fired!!!
        }
    }
}

hamurcuabi

interface OnBackPressedDelegation {

    fun registerOnBackPressedDelegation(
        fragmentActivity: FragmentActivity?,
        lifecycle: Lifecycle,
        onBackPressed: () -> Unit
    )
}

hamurcuabi

class HomeFragment : Fragment() {

    private val onBackPressedCallback = object : OnBackPressedCallback(true) {
        override fun handleOnBackPressed() {
            // On back pressed
        }
    }

    override fun onResume() {
        super.onResume()