方法getText（）必须从UI线程（Android Studio）调用

尝试将您的值传递给

Login AsyncTask

execute(param1, param1, ..., paramN)

submit.setonClickListener(new View.onClickListener() {@Overridepublic void onClick(View arg0) {    String username = uname.getText().toString();    String pass = password.getText().toString();    new Login().execute(username, pass);}       });    }    private void findViewsById() {        uname = (EditText) findViewById(R.id.txtUser);        password = (EditText) findViewById(R.id.txtPass);        submit = (Button) findViewById(R.id.login);    }    private class Login extends AsyncTask<String, String, String>{        @Override        protected String doInBackground(String... args) { // Getting username and password from user input String username = args[0]; String pass = args[1];