保存网页以供离线使用并调用相同的android [英] Save webpage for offline use and invoke the same android

问题描述

我有一个android应用程序要求，我需要打开保存的网页，该怎么做?首先，我们如何在Android上保存具有相关性的网页，然后在您的应用程序中打开它?任何输入都会有很大帮助！

I am having an android application requirement where i need to open saved web pages, how to do the same?? FIrst of all, how can we save a webpage with its dependancies on android and later open it in your applications? Any inputs will be of great help!

推荐答案

首先，让我们从 webview

private void initUI{
     webView = (WebView) findViewById(R.id.webView);
     AndroidWebClient client = new AndroidWebClient();
     webView.setWebViewClient(client);
     WebSettings webSettings = webView.getSettings();
     webSettings.setJavaScriptEnabled(true);
}
private class AndroidWebClient extends WebViewClient {
        @Override
        public void onPageStarted(WebView view, String url,
                                  android.graphics.Bitmap favicon) {                
        }
        public void onPageFinished(WebView view, String url) {
            super.onPageFinished(view, url);
            view.saveWebArchive(Environment.getExternalStorageDirectory()
                    + File.separator +"myArchive"+".mht");
            // our webarchive wull be available now at the above provided location with name "myArchive"+".mht"

        }
        public void onLoadResource(WebView view, String url) {

        }
      }

所有API中保存webarchive的方式都相同，但加载方式却有所不同

The way to save the webarchive is same in all APIs but to load it, varies

适用于少于Kitkat的API

private void loadArchive(){
     String rawData = null;
        try {
            rawData =   getStringFromFile(Environment.getExternalStorageDirectory()
                    + File.separator+"myArchive"+".mht");
        } catch (Exception e) {
            e.printStackTrace();
        }
webView.loadDataWithBaseURL(null, rawData, "application/x-webarchive-xml", "UTF-8", null);
}

  public String getStringFromFile (String filePath) throws Exception {
        File fl = new File(filePath);
        FileInputStream fin = new FileInputStream(fl);
        String ret = convertStreamToString(fin);
        //Make sure you close all streams.
        fin.close();
        return ret;
    }

    public  String convertStreamToString(InputStream is) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        StringBuilder sb = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
            sb.append(line).append("\n");
        }
        reader.close();
        return sb.toString();
    }

Kitkat及更高版本

private void loadArchive(){
   webView.loadUrl("file:///"+Environment.getExternalStorageDirectory()
                + File.separator+"myArchive"+".mht");
}

这篇关于保存网页以供离线使用并调用相同的android的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！