orhanavan

<TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:shadowColor="#FF41DA"
        android:shadowDx="50"
        android:shadowDy="20"
        android:shadowRadius="10"
        android:text="Hello World!"
        android:textSize="40sp" />

orhanavan

textView.setShadowLayer(10,50,20, Color.parseColor("#FF41DA"));

orhanavan

button = findViewById(R.id.button);

// creating listener for each button
View.OnClickListener btnClick = new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        // do anything
    }
};

orhanavan

button.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        // do anything
    }
});

orhanavan

<CheckBox
        android:id="@+id/checkBox"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Kuralları okudum ve onaylıyorum." />

orhanavan

final CheckBox checkBox = findViewById(R.id.checkBox);
checkBox.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        if (checkBox.isChecked())
            checkBox.setChecked(true);
        else
            checkBox.setChecked(false);
    }
});

orhanavan

final CheckBox checkBox = findViewById(R.id.checkBox);
checkBox.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        if (((CheckBox) view).isChecked()) {
            checkBox.setChecked(false);
        } else {
            checkBox.setChecked(true);
        }
    }

orhanavan

package com.kotlin.sharedpreferences

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.util.Log

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

orhanavan

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"

orhanavan

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".Main2Activity">

    <TextView
        android:id="@+id/textView"