"constructor MediaPlayer in class MediaPlayer cannot be applied to given types"

import android.graphics.Color;
import android.media.MediaPlayer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.TextView;
import android.widget.ToggleButton;
 
import java.util.Random;
 
public class MainActivity extends AppCompatActivity implements CompoundButton.OnCheckedChangeListener{
 
    Button bt;
    Random random;
    TextView mytext1;
    TextView mytext2;
    ToggleButton tb;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
 
 
 
    }
    public void Normal(){
 
        bt = (Button) findViewById(R.id.button);
        bt.setOnClickListener(new View.OnClickListener() {
 
            @Override
            public void onClick(View view) {
                final MediaPlayer mp  = new MediaPlayer(this,R.raw.sample);
                random = new Random();
                mytext1 = (TextView) findViewById(R.id.sample_text);
                int rannum = (random.nextInt(100) + 1);
                String str = String.valueOf(rannum);
                mytext1.setText(str);
                mp.start();
            }
        });
 
    }