app is getting crashed-random number generator

This is my java file of Random number generator. Whenever I run the app it get crashed. Help me out!

public class MainActivity extends AppCompatActivity {

    int  k;

    public void lol(View v) {

        EditText e1 = (EditText) findViewById(R.id.e1);
        EditText e2 = (EditText) findViewById(R.id.e2);
        TextView t = (TextView) findViewById(R.id.t);
        int h = Integer.parseInt(String.valueOf(e1));
        int i = Integer.parseInt(String.valueOf(e2));
        Random u = new Random();

        k = h + u.nextInt(i);
        t.setText(k);
    }
}