Android 发送带有参数的HTTP POST请求
示例
使用HashMap存储应通过POST参数发送给服务器的参数：
HashMap<String, String> params;
一旦paramsHashMap的填充，创建将用于它们发送到服务器StringBuilder的：
StringBuilder sbParams = new StringBuilder();
int i = 0;
for (String key : params.keySet()) {
try {
if (i != 0){
sbParams.append("&");
}
sbParams.append(key).append("=")
.append(URLEncoder.encode(params.get(key), "UTF-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
i++;
}然后，创建HttpURLConnection，打开连接，并发送POST参数：
try{
String url = "http://www.example.com/test.php";
URL urlObj = new URL(url);
HttpURLConnection conn = (HttpURLConnection) urlObj.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Accept-Charset", "UTF-8");
conn.setReadTimeout(10000);
conn.setConnectTimeout(15000);
conn.connect();
String paramsString = sbParams.toString();
DataOutputStream wr = new DataOutputStream(conn.getOutputStream());
wr.writeBytes(paramsString);
wr.flush();
wr.close();
} catch (IOException e) {
e.printStackTrace();
}然后收到服务器发回的结果：
try {
InputStream in = new BufferedInputStream(conn.getInputStream());
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuilder result = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
Log.d("test", "来自服务器的结果： " + result.toString());
} catch (IOException e) {
e.printStackTrace();
} finally {
if (conn != null) {
conn.disconnect();
}
}