gcherubini

public class HomeActivityJava extends BaseActivityJava {
    private final String USER_NAME = "Albert Eisten";
    private final int TIMER_SECONDS = 5;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActivityHomeBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_home);
        User user = new User(USER_NAME);
        binding.setVariable(BR.user, user);

gcherubini

class HomeActivity : AppCompatActivity() {
    private val USER_NAME = "Albert Eisten"
    private val TIMER_SECONDS = 5

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        val binding: ActivityHomeBinding = DataBindingUtil.setContentView(this, R.layout.activity_home)
        val user = User(USER_NAME)
        binding.setVariable(BR.user, user)
        binding.executePendingBindings()

gcherubini

class HomeActivity : Activity() { }

gcherubini

class HomeActivity : AppCompatActivity() {
    val layoutFile = R.layout.activity_home

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        val binding: ActivityHomeBinding = DataBindingUtil.setContentView(this, layoutFile)

        binding?.btnSend?.setOnClickListener {  btnSendActions(binding) }
    }
}

gcherubini

class HomeActivity : Activity(), InterfaceToBeImplemented {
    override fun interfaceMethod() { }
}

gcherubini

class WelcomeActivity : AppCompatActivity() {
    companion object {
        const val EXTRA_PARAM_USER_NAME = "EXTRA_PARAM_USER_NAME"
    }
    
    val layoutFile = R.layout.activity_welcome
    
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        val binding: ActivityWelcomeBinding = DataBindingUtil.setContentView(this, layoutFile)

gcherubini

 someButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        btnActions()
    }
});

gcherubini

fun simpleMethod(param1: Int, param2: Int = 0) : Int { return param1 + param2 }

gcherubini

someButton.setOnClickListener { view -> btnActions() }

gcherubini

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:orientation="vertical"
        android:layout_margin="40dp">

        <EditText