sinancakir

class DataSingletonActivity : AppCompatActivity(), View.OnClickListener {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_data_singleton)

        val name = intent.getStringExtra("Name")
        val phone = intent.getStringExtra("Phone")
        activity_data_txtData.text = "Name : " + name + "\nPhone : " + phone

sinancakir

class SingletonActivity : AppCompatActivity(), View.OnClickListener {

    private var edtName: EditText? = null
    private var edtPhone: EditText? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        title = "Singleton Activity"
        setContentView(R.layout.activity_singleton)

sinancakir

object UserModelSingleton {
    var name: String? = null
    var phone: String? = null
}

sinancakir

public class Singleton {
  
    private static Singleton instance = null;
 
    private Singleton(){
    }
 
    private synchronized static void createInstance() {
        if (instance == null) {
            instance = new Singleton();

sinancakir

class DataParcelableActivity : AppCompatActivity(), View.OnClickListener {


    private var userModel: UserModelParcelable? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_data_parcelable)

        userModel = intent.extras.getParcelable("UserModelParcelable") as UserModelParcelable

sinancakir

class ParcelableActivity : AppCompatActivity(), View.OnClickListener {

    private var edtName: EditText? = null
    private var edtPhone: EditText? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        title = "Parcelable Activity"
        setContentView(R.layout.activity_parcelable)

sinancakir

data class UserModelParcelable(val name: String, val phone: String) : Parcelable {
    constructor(source: Parcel) : this(
            source.readString(),
            source.readString()
    )

    override fun describeContents() = 0

    override fun writeToParcel(dest: Parcel, flags: Int) = with(dest) {
        writeString(name)

sinancakir

class DataSerializableActivity : AppCompatActivity(), View.OnClickListener {

    private var userModel: UserModelSerializable? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        title = "Data Serializable Activity"
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_data_serializable)

        userModel = intent.extras.getSerializable("UserModelSerializable") as UserModelSerializable

sinancakir

class SerializableActivity : AppCompatActivity(), View.OnClickListener {

    private var edtName: EditText? = null
    private var edtPhone: EditText? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        title = "Serializable Activity"
        setContentView(R.layout.activity_serializable)

sinancakir

data class UserModelSerializable(val name: String, val phone: String) : Serializable