使用android webview禁用文本输入php中的字母

我用php开发了一个网站，其中包括用户名和密码。在默认浏览器中，用户可以键入其学生id，这完全正常，学生不能在用户名中键入字母。但当我在android studio webview中应用它时，当我在webview中应用它时，它允许输入字母。帮助我解决我的问题，因为我是android studio的新手

//login\u view.class

    String url=    "http://uopcereviewer.16mb.com/CE%20Reviewer/php/student/login.php";user_name" + name;
    final WebView view = (WebView) this.findViewById(R.id.webView);


  // final ProgressDialog pd = ProgressDialog.show(login_view.this, " ",  "Loading ...", true);


    view.getSettings();
    view.setBackgroundColor(Color.TRANSPARENT);
    view.loadUrl(url);
    view.setWebChromeClient(new WebChromeClient() {

    });

    view.getSettings().setJavaScriptEnabled(true);
    view.getSettings().setDomStorageEnabled(true);
    WebSettings setting = view.getSettings();

    setting.setDefaultTextEncodingName("utf-8");
    view.setWebViewClient(new WebViewClient() {
        SharedPreferences sharedPreferences = getSharedPreferences("MyData", Context.MODE_PRIVATE);
        String name = sharedPreferences.getString("idnum", DEFAULT);

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return true;
        }

        //  public void onProgressChanged(WebView view, int progress) {
        //progress.setProgress(progress * 1000);
        // }
    });

    view.setWebViewClient(new WebViewClient() {

        public void onReceivedError(WebView view1, int errorCode, String description, String failingUrl) {
            view1.loadUrl("about:blank");
            Toast.makeText(login_view.this, "Error Check your Internet Connection..", Toast.LENGTH_LONG).show();

        }


        @Override
        public void onPageStarted(WebView view1, String url, Bitmap favicon) {
            //  pd.show();

        }

        @Override
        public void onPageFinished(WebView view1, String url) {
            //    pd.dismiss();
            String webUrl = view.getUrl();
        }

    });
    SharedPreferences sharedPreferences=getSharedPreferences("MyData",Context.MODE_PRIVATE);
    String name= sharedPreferences.getString("idnum",DEFAULT);

    view.loadUrl("http://uopcereviewer.16mb.com/CE%20Reviewer/php/student/login.php?StudentNumber=sharedpref &Password=sharedpref Password" + name);

}
@Override
public void onBackPressed() {
    return;
}

}