loginBtn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String user=username.getText().toString();
                String pass=password.getText().toString();
                LoginActivity loginActivity=new LoginActivity();
                loginActivity.TokenRequest(getApplicationContext(), user, pass, "http://gladiolus.htl-leonding.ac.at/SpommunicateService/token", LoginInputModeActivity.this);
            }
        });