Http部分

首先是WebView部分，内嵌浏览器

webView = (WebView) findViewById(R.id.web_view);
webView.getSettings().setJavaScriptEnabled(true);
webView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String
url) {
view.loadUrl(url); // 根据传入的参数再去加载新的网页
return true; // 表示当前WebView可以处理打开新网页的请求，不用借助
系统浏览器
}
});
webView.loadUrl("http://www.baidu.com");

使用 HttpURLConnection

URL url = new URL("http://www.baidu.com");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setConnectTimeout(8000);
connection.setReadTimeout(8000);
InputStream in = connection.getInputStream();
BufferedReader reader = new BufferedReader(new
InputStreamReader(in));
StringBuilder response = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
response.append(line);
}


connection.disconnect();

使用 HttpClient
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet("http://www.baidu.com");
httpClient.execute(httpGet);


HttpPost httpPost = new HttpPost("http://www.baidu.com");
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("username", "admin"));
params.add(new BasicNameValuePair("password", "123456"));
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(params, "utf-8");
httpPost.setEntity(entity);
httpClient.execute(httpPost);