Question

我在WebView中加载了一个Url。这是一个登录页面。我希望在我在此登录页面上输入凭据后获得身份验证后得到的响应。

这是我到目前为止所做的： -

Login.java

wvLogin = (WebView)findViewById(R.id.WVLogin);

// WebView settings
wvLogin.getSettings().setJavaScriptEnabled(true);
wvLogin.getSettings().setUseWideViewPort(true);

// Load url
wvLogin.loadUrl("myUrl");

// Set WebViewClient to load the url in webview and not phone's default browser.
wvLogin.setWebViewClient(new WebViewClient() {

    @Override
    public void onPageFinished(WebView view, String url) {
        super.onPageFinished(view, url);

        redirected =view.getUrl();
        redirected=  Uri.decode(redirected);

        if (redirected != null && redirected.equals(redirectUri)) {
            wvLogin.stopLoading();
            Intent mIntent = new Intent(LoginActivity.this, Update.class);
            startActivity(mIntent);
        }
    }

    @Override
    public void onPageStarted(WebView view, String url, Bitmap favicon)  {
        super.onPageStarted(view, url, favicon);
    }

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

});

我该怎么做呢？

Answer 1

使您的登录结果页面包含一个元标记，其中包含您需要的标记信息。

在您的活动设置中，您的wvLogin：

_wvLogin.getSettings().setJavaScriptEnabled(true);

_wvLogin.addJavascriptInterface(new Object() {
    @SuppressWarnings("unused")
    @android.webkit.JavascriptInterface
    public void saveMetaTag(final String name, final String value) {
        //Save meta tag value in some dictionary
    }

    @SuppressWarnings("unused")
    @android.webkit.JavascriptInterface
    public void onNoMoreMetaTags() {
        //Process meta tags
    }

}, "metaLoader");

然后执行javascript：

读取元标记

wvLogin.loadUrl("javascript:var metaTags = document.getElementsByTagName('meta'); if (metaTags != null && metaTags.length > 0) {var i; for (i=0;i<metaTags.length;i++) { window.metaLoader.saveMetaTag(metaTags[i].name, metaTags[i].content);  };  }; window.metaLoader.onNoMoreMetaTags();");

Answer 2

试试这个 -

设置javascript界面

wvLogin.getSettings().setJavaScriptEnabled(true);
wvLogin.addJavascriptInterface(new JSInterface(), "HTMLOUT");

在onPageFinished（）中获取HTML标记

@Override
public void onPageFinished(WebView view, String url) {
 view.loadUrl("javascript:window.HTMLOUT.showHTML('<head>'+document.getElementsByTagName('html')[0].innerHTML+'</head>');");
}

添加定义您的JS接口

//JavaScript interface
class MyJavaScriptInterface {
    public void showHTML(String result) {
      String htmlString = result;
      //Do your stuff with the result
    }
}

这仅适用于API 17及更高版本

Answer 3

为此，您需要使用WebViewClient。像 wvLogin.setWebChromeClient（new YourWebClient（））;

String htmlContent = "";
private class YourWebClient extends WebViewClient{

    // you want to catch when an URL is going to be loaded
    public boolean  shouldOverrideUrlLoading  (WebView  view, String  urlConection){
        URL aURL = new URL(url); 
        URLConnection conn = aURL.openConnection(); 
        conn.connect(); 
        InputStream is = conn.getInputStream();
        htmlContent = convertToString(is);
    }

    public String convertToString(InputStream inputStream){
       StringBuffer string = new StringBuffer();
       BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
       String line;
       try {
          while ((line = reader.readLine()) != null) {
             string.append(linea + "\n");
          }
       } catch (IOException e) {}
       return string.toString();
    }
}

在Webview中加载Url并获取其响应

3 个答案: