view binding android

// Android Studio 4.0
android {
    buildFeatures {
        viewBinding = true
    }
}

class ContactsAdapter (private val mContacts: List<Contact>) : RecyclerView.Adapter<ContactsAdapter.ViewHolder>()
{
    // Provide a direct reference to each of the views within a data item
    // Used to cache the views within the item layout for fast access
    inner class ViewHolder(listItemView: View) : RecyclerView.ViewHolder(listItemView) {
        // Your holder should contain and initialize a member variable
        // for any view that will be set as you render a row
        val nameTextView = itemView.findViewById<TextView>(R.id.contact_name)
        val messageButton = itemView.findViewById<Button>(R.id.message_button)
    }

    // ... constructor and member variables
    // Usually involves inflating a layout from XML and returning the holder
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ContactsAdapter.ViewHolder {
        val context = parent.context
        val inflater = LayoutInflater.from(context)
        // Inflate the custom layout
        val contactView = inflater.inflate(R.layout.item_contact, parent, false)
        // Return a new holder instance
        return ViewHolder(contactView)
    }

    // Involves populating data into the item through holder
    override fun onBindViewHolder(viewHolder: ContactsAdapter.ViewHolder, position: Int) { 
        // Get the data model based on position
        val contact: Contact = mContacts.get(position)
        // Set item views based on your views and data model
        val textView = viewHolder.nameTextView
        textView.setText(contact.name)
        val button = viewHolder.messageButton
        button.text = if (contact.isOnline) "Message" else "Offline"
        button.isEnabled = contact.isOnline
    }

    // Returns the total count of items in the list
    override fun getItemCount(): Int {
        return mContacts.size
    }
}

<com.google.android.material.textfield.TextInputLayout
                android:id="@+id/til_title"
                style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent">

                <androidx.appcompat.widget.AppCompatEditText
                    android:id="@+id/et_title"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:hint="@string/edit_text_hint_title"
                    android:inputType="textCapWords"
                    android:textColor="@color/primaryTextColor"
                    android:textColorHint="@color/secondaryTextColor"
                    android:textSize="@dimen/edit_text_text_size" />
            </com.google.android.material.textfield.TextInputLayout>

try {
  	//open application settings
  	val intent = Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS)
  	val uri = Uri.fromParts("package",packageName, null)
  	intent.data = uri
  	startActivity(intent)
}catch (e:IOException){
  	e.printStackTrace()
}

private fun askPermissions(){
        Dexter.withContext(this)
                .withPermissions(
                        Manifest.permission.ACCESS_FINE_LOCATION,
                        Manifest.permission.ACCESS_COARSE_LOCATION
                )
                .withListener(object : MultiplePermissionsListener {
                    override fun onPermissionsChecked(report: MultiplePermissionsReport?) {
                        if (report!!.areAllPermissionsGranted()) {
                            // TODO (STEP 7: Call the location request function here.)
                        }

                        if (report.isAnyPermissionPermanentlyDenied) {
                            Toast.makeText(
                                    this@MainActivity,
                                    "You have denied location permission. Please allow it is mandatory.",
                                    Toast.LENGTH_SHORT
                            ).show()
                        }
                    }

                    override fun onPermissionRationaleShouldBeShown(
                            permissions: MutableList<PermissionRequest>?,
                            token: PermissionToken?
                    ) {
                        showRationalDialogForPermissions()
                    }
                }).onSameThread()
                .check()

    }