public class MainActivity extends AppCompatActivity {

    Button b;

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

        b = findViewById(R.id.b);

        b.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(MainActivity.this, Browser.class);
                intent.putExtra("url", "https://www.google.com");
                startActivity(intent);
            }
        });

    }

}