Custom Font in Android Studio

MainActivity.java

package com.codingwithsara.customfont;

import android.graphics.Typeface;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    TextView myText;
    Typeface customFont;
    Boolean change = true;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        myText = findViewById(R.id.myText);
        customFont = Typeface.createFromAsset(getAssets(), "Lobster-Regular.ttf");
    }

    public void switchFont(View view) {
        if (change) {
            myText.setText("Custon Font");
            myText.setTypeface(customFont);
        } else {
            myText.setText("Default");
            myText.setTypeface(Typeface.DEFAULT);
        }
        change = !change;
    }
}