Question

我发现了从webview阅读内容的问题。我尝试过无法修复。

我在webview中显示了一个html页面。我需要string

中该html页面的内容

java代码

WebView mainContent = (WebView)layout.findViewById(R.id.webView1);
         mainContent.getSettings().setJavaScriptEnabled(true);
         WebSettings webSettings = mainContent.getSettings();
         webSettings.setJavaScriptEnabled(true);
         webSettings.setBuiltInZoomControls(true);
         mainContent.requestFocusFromTouch();
          mainContent.setWebViewClient(new WebViewClient() {
                @Override
                public void onPageFinished(WebView view, String url) {
                    super.onPageFinished(view, url);
                    mainContent.loadUrl("javascript:window.HTMLOUT.processHTML('<html>'+document.getElementsByTagName('html')[0].innerHTML+'</html>');");
                }
            });
         mainContent.setWebChromeClient(new WebChromeClient());
         mainContent.loadUrl("file:///android_asset/"+filename.get(position));
         webSettings.setDefaultFontSize(40);

在我的活动中

public void processHTML(String html) {

                System.out.println("======++++"+Html.fromHtml(html));
            }

我没有看到我的任何记录。如何在HTML中获取String页面的内容（文本）。我做错了什么？提前致谢

Answer 1

我通过这种方式获得了内容

mainContent.getSettings().setJavaScriptEnabled(true);
            WebSettings webSettings = mainContent.getSettings();
            webSettings.setJavaScriptEnabled(true);
            webSettings.setBuiltInZoomControls(true);
            mainContent.requestFocusFromTouch();
            mainContent.setWebChromeClient(new WebChromeClient());
            mainContent.loadUrl("file:///android_asset/"+filename.get(position));
            mainContent.setWebViewClient(new WebViewClient() {
                @Override
                public void onPageFinished(WebView view, String url) {
                    super.onPageFinished(view, url);
                    mainContent.setWebViewClient(null);    
           mainContent.loadUrl("javascript:window.HTMLOUT.processHTML('<div>'+document.getElementsByTagName('div')[0].innerHTML+'</div>');");

和我的活动

class MyJavaScriptInterface {
        @SuppressWarnings("unused")
        public void processHTML(final String html) {
            runOnUiThread(new Runnable() {
                public void run() {
                     Spanned page = Html.fromHtml(html);
                     System.out.println("content"+page);

                }
            });
        }
    }

Answer 2

您是否尝试过向该页面发送GET请愿书？

responseString是String中的HTML页面。例如：

class RequestTask extends AsyncTask<String, String, String>{

    @Override
    protected String doInBackground(String... uri) {
        HttpClient httpclient = new DefaultHttpClient();
        HttpResponse response;
        String responseString = null;
        try {
            response = httpclient.execute(new HttpGet(uri[0]));
            StatusLine statusLine = response.getStatusLine();
            if(statusLine.getStatusCode() == HttpStatus.SC_OK){
                ByteArrayOutputStream out = new ByteArrayOutputStream();
                response.getEntity().writeTo(out);
                out.close();
                responseString = out.toString();
            } else{
                //Closes the connection.
                response.getEntity().getContent().close();
                throw new IOException(statusLine.getReasonPhrase());
            }
        } catch (ClientProtocolException e) {
            //TODO Handle problems..
        } catch (IOException e) {
            //TODO Handle problems..
        }
        return responseString;
    }

    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);
        //Do anything with response..
    }
}

启动AsyncTask，如：

try {
        String page = new RequestTask().execute("http://myurl.com").get();
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (ExecutionException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

如何获取webview中显示的html页面的全部内容文本

2 个答案: