在我的Android应用中，我想要一个带有GET参数的网址并阅读回复。在请求中我必须添加两个头参数（键和dt）.i写了一些代码，但我有404错误。这是我的来源
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String pass = "pass";
DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss"); // 2008-03-09T16:05:07
Date date = new Date();
System.out.println(dateFormat.format(date));
Calendar cal = Calendar.getInstance();
String gettime = dateFormat.format(cal.getTime());
System.out.println(gettime);
String Key = md5(pass + cal.getTime());
System.out.println(Key);
// Log.e("Md5", gettime);
SendHttpGetRequest(Key, gettime);
}
private static String md5(String s) {
try {
// Create MD5 Hash
MessageDigest digest = java.security.MessageDigest
.getInstance("MD5");
digest.update(s.getBytes());
byte messageDigest[] = digest.digest();
// Create Hex String
StringBuffer hexString = new StringBuffer();
for (int i = 0; i < messageDigest.length; i++)
hexString.append(Integer.toHexString(0xFF & messageDigest[i]));
return hexString.toString();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return "";
}
public void SendHttpGetRequest(final String mykey, final String mydt) {
class CheckLattery extends AsyncTask<String, Void, String> {
ProgressDialog pDialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setCancelable(false);
pDialog.show();
pDialog.setContentView(R.layout.custom_progressdialog);
}
@Override
protected String doInBackground(String... params) {
HttpClient httpClient = getNewHttpClient();
try {
HttpGet httpGet = new HttpGet(
"************");
httpGet.addHeader("key", mykey);
httpGet.addHeader("dt", mydt);
HttpResponse httpResponse = httpClient.execute(httpGet);
System.out.println("httpResponse");
InputStream inputStream = httpResponse.getEntity()
.getContent();
InputStreamReader inputStreamReader = new InputStreamReader(
inputStream);
BufferedReader bufferedReader = new BufferedReader(
inputStreamReader);
StringBuilder stringBuilder = new StringBuilder();
String bufferedStrChunk = null;
while ((bufferedStrChunk = bufferedReader.readLine()) != null) {
stringBuilder.append(bufferedStrChunk);
}
System.out.println("Returning value of doInBackground :"
+ stringBuilder.toString());
return stringBuilder.toString();
} catch (ClientProtocolException cpe) {
System.out
.println("Exception generates caz of httpResponse :"
+ cpe);
cpe.printStackTrace();
} catch (IOException ioe) {
System.out
.println("Second exception generates caz of httpResponse :"
+ ioe);
ioe.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
if (pDialog != null) {
pDialog.dismiss();
pDialog = null;
}
Log.wtf("result", result + "res");
}
}
CheckLattery latterychek = new CheckLattery();
latterychek.execute();
}
public HttpClient getNewHttpClient() {
try {
KeyStore trustStore = KeyStore.getInstance(KeyStore
.getDefaultType());
trustStore.load(null, null);
SSLSocketFactory sf = new MySSLSocketFactory(trustStore);
sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
HttpParams params = new BasicHttpParams();
HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);
SchemeRegistry registry = new SchemeRegistry();
registry.register(new Scheme("http", PlainSocketFactory
.getSocketFactory(), 80));
registry.register(new Scheme("https", sf, 443));
ClientConnectionManager ccm = new ThreadSafeClientConnManager(
params, registry);
return new DefaultHttpClient(ccm, params);
} catch (Exception e) {
return new DefaultHttpClient();
}
}
}
在我的选项中我在头参数中有问题。我不知道什么是错误的...我第一次在httpget方法中使用头参数 如果有人知道解决方案，请帮助我谢谢
答案 0 :(得分：0)
请参考下面的Code.If GET方法表示传递空字符串。
public ServiceHelper(Context context) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
.permitAll().build();
StrictMode.setThreadPolicy(policy);
this.context = context;
}
public JSONObject jsonSendHTTPRequest(String requestData,
String requestURL, String requestType) {
try {
if (!Utilities.isConnectingToInternet(context)) {
JSONresponseText = new JSONObject();
JSONresponseText.put(Constants.KEY_ERROR,
Constants.TOAST_INTERNET);
} else {
HttpURLConnection connection = null;
try {
Log.e("request data", requestData + Constants.EMPTY_STRING
+ requestURL);
URL object = new URL(requestURL);
connection = (HttpURLConnection) object.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestMethod(requestType);
connection.setRequestProperty(Constants.KEY_CONTENT_TYPE,
Constants.VALUE_CONTENT_TYPE);
connection.setRequestProperty(Constants.KEY_ACCEPT,
Constants.VALUE_CONTENT_TYPE);
connection.setRequestProperty(Constants.KEY_AUTHENTICATION,
Constants.VALUE_ENCODING_AUTHENTICATION);
if (requestType
.equalsIgnoreCase(Constants.REQUEST_TYPE_POST)) {
OutputStreamWriter streamWriter = new OutputStreamWriter(
connection.getOutputStream());
streamWriter.write(requestData);
streamWriter.flush();
}else{
requestURL = requestURL.replaceAll(" ", "%20");
}
StringBuilder stringBuilder = new StringBuilder();
if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
InputStreamReader streamReader = new InputStreamReader(
connection.getInputStream());
BufferedReader bufferedReader = new BufferedReader(
streamReader);
String response = null;
while ((response = bufferedReader.readLine()) != null) {
stringBuilder.append(response + "\n");
}
bufferedReader.close();
Log.d("Result Value ", stringBuilder.toString());
jsonResultText = new JSONObject(
stringBuilder.toString());
return jsonResultText;
} else {
Log.e("Error = ", connection.getResponseMessage());
return null;
}
} catch (Exception exception) {
Log.e("Error = ", exception.toString());
return null;
} finally {
if (connection != null) {
connection.disconnect();
}
}
}
} catch (Exception e) {
Log.e("Error = ", e.toString());
}
return JSONresponseText;
}
答案 1 :(得分：0)
如果你使用httpClient发布请求，你可以使用HttpGet设置你发布的标题，如果你使用HttpURLConnection来做，你应该使用下面的代码：
HttpURLConnection connection = null;
URL object = new URL("your url");
connection = (HttpURLConnection) object.openConnection();
connection.setRequestProperty("header name","header value");