public class ButtonHandler implements View.OnClickListener{
        public void onClick(View v) {
            userName = (EditText) findViewById(R.id.UserName);
            String userNameStr = userName.getText().toString();

            password = (EditText) findViewById(R.id.Password);
            String passwordStr = userName.getText().toString();

            Boolean loginResult = dbManager.loginValidation(userNameStr, passwordStr);

            if(loginResult){
                Intent viewIntent = new Intent (MainActivity.this, ViewEvent.class);
                this.startActivity(viewIntent);
            }
            else{
                Toast.makeText( MainActivity.this, "Username or Password is wrong", Toast.LENGTH_LONG).show();
                userName.setText("");
                password.setText("");
            }


        }
    }