android-如何在android中获取网页的html代码？

Question

我想在android中获取网页的html代码。该网页的网址将在编辑文本框中给出，然后当用户点击该按钮时，文本视图将显示该网页的代码。请解释并给出代码！

任何帮助，将不胜感激！

Answer 1

HttpClient client = new DefaultHttpClient(); 
HttpGet request = new HttpGet(url); 
HttpResponse response = client.execute(request); 

String html = ""; 
InputStream in = response.getEntity().getContent(); 
BufferedReader reader = new BufferedReader(new InputStreamReader(in)); 
StringBuilder str = new StringBuilder(); 
String line = null; 
while((line = reader.readLine()) != null) 
{ 
    str.append(line); 
} 
in.close(); 
html = str.toString(); 

不要忘记添加Internet权限在AndroidManifest：

<uses-permission android:name="android.permission.INTERNET" /> 

您可以参考这些链接以获得更多帮助：

http://lexandera.com/2009/01/extracting-html-from-a-webview/

Is it possible to get the HTML code from WebView

How to get the html-source of a page from a html link in android?

Answer 2

您需要HttpClient才能执行HttpGet请求。然后您可以阅读该请求的内容。

这个片段给你一个InputStream：

public static InputStream getInputStreamFromUrl(String url) { 
    InputStream content = null; 
    try { 
    HttpClient httpclient = new DefaultHttpClient(); 
    HttpResponse response = httpclient.execute(new HttpGet(url)); 
    content = response.getEntity().getContent(); 
    } catch (Exception e) { 
    Log.e("[GET REQUEST]", "Network exception", e); 
    } 
    return content; 
} 

而这个方法返回String：

// Fast Implementation 
private StringBuilder inputStreamToString(InputStream is) { 
    String line = ""; 
    StringBuilder total = new StringBuilder(); 

    // Wrap a BufferedReader around the InputStream 
    BufferedReader rd = new BufferedReader(new InputStreamReader(is)); 

    // Read response until the end 
    while ((line = rd.readLine()) != null) { 
     total.append(line); 
    } 

    // Return full string 
    return total; 
} 

来源：http://www.androidsnippets.com/executing-a-http-get-request-with-httpclient和http://www.androidsnippets.com/get-the-content-from-a-httpresponse-or-any-inputstream-as-a-string

Answer 3

使用上面的代码，并将其设置为像这样的文本视图：

InputStream is =InputStream getInputStreamFromUrl("http://google.com"); 
String htmlText = inputStreamToString(is); 

mTextView.setText(Html.fromHtml(htmlText)); 

但做网络请求在一个单独的线程/ asynctask :)