public class MainActivity extends AppCompatActivity {

     private Button button;
     private EditText mloginArbsText;
     private EditText mpasswordArbsText;
     public String user;
     public String pass;


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

         mloginArbsText = (EditText) findViewById(R.id.loginArbsText);
         mpasswordArbsText = (EditText) findViewById(R.id.passwordArbsText);


         button = (Button) findViewById(R.id.loginButton);

         button.setOnClickListener(new View.OnClickListener() {


             @Override
             public void onClick(View v) {

                 user = mloginArbsText.getText().toString();

                 pass = mpasswordArbsText.getText().toString();


                 Intent intent = new Intent(getApplicationContext(), WebViewActivity.class);
                 intent.putExtra("user", user);
                 intent.putExtra("pass", pass);
                 startActivity(intent);
             }
         });
     }
}

public class WebViewActivity extends AppCompatActivity {

    private WebView webView;



    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_web_view);
        webView = (WebView) findViewById(R.id.webView1);
        webView.getSettings().setUseWideViewPort(true);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.setWebViewClient(new WebViewClient());
        webView.loadUrl("https://famnen.arcada.fi/arbs/timetables/view_timetable_personal.php?students=0&course=0&staff=0&room=0&day=23&month=09&year=2017");

    }
}