android - 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。网页 url 将在编辑文本框中给出，然后当用户单击按钮时，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();

不要忘记在 AndroidManifest 中添加互联网权限：

<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/

是否可以从 WebView 获取 HTML 代码

如何从android中的html链接获取页面的html源？

Answer 2

你需要一个HttpClient来执行一个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;
}

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-任何输入流作为字符串

Answer 3

使用上面的代码，并将其设置为这样的文本视图：

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

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

但在单独的线程/异步任务中执行网络请求:)