使用get方法它正在工作，但当我尝试Post方法时，我什么都没得到。 请查看我的代码，让我知道我在哪里做错了什么 我有两个参数来传递用户名和密码。
class AsyncT extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... voids) {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://192.168.1.105:8080/api/login");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("username", "adii@adii.com"));
nameValuePairs.add(new BasicNameValuePair("password", "password"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
httppost.setHeader("content-type", "application/json; charset= utf-8");
httppost.setHeader("Accept", "application/json");
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
try {
BufferedReader reader = null;
if (is != null) {
reader = new BufferedReader(new InputStreamReader(
//"UTF-8" "iso-8859-1"
is, "UTF-8"), 8);
}
StringBuilder sb = new StringBuilder();
String line;
if (reader != null) {
while ((line = reader.readLine()) != null) {
sb.append(line).append("\n");
}
}
if (is != null) {
is.close();
}
result = sb.toString();
Log.e("sb",result);
} catch (Exception e) {
Log.e("log_tag", "Error converting result " + e.toString());
}
return null;
}
}
答案 0 :(得分：2)
我不知道您的代码有什么问题，但您应该尝试使用此代码，它在这里与我完美配合。希望它能帮到你
public String ip = "192.168.43.114";
public String port = "59397";
public HttpPost httppost;
String ServerAddress;
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
JSONObject json = new JSONObject();
尝试在函数中实现您的任务，以便它可以重用。
public int login(String username, String password) {
ServerAddress = "http://"+ip+":"+port+"/api/Users/Login";
Log.v("check","inLoginMethod");
try {
json = new JSONObject();
json.put("UserName", username);
json.put("PassWord", password);
AsyncTask<String, Integer, String> asynchTask;
AsynchServerConnection asc = new AsynchServerConnection();
asynchTask = asc.execute("");
String res = asynchTask.get();
Log.v("RES", res);
//res = jsonObject.toString();
//int check = Integer.parseInt(res);
Log.i("checkR", res + "here");
return res;
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.i("checkR", "Interrupted exception");
return 0;
} catch (ExecutionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.i("checkR", "ExecutionException");
return 0;
}
catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.i("checkR", "JSONException");
Log.i("checkR", e.getMessage());
return 0;
}
}
最后是异步任务类
private class AsynchServerConnection extends
AsyncTask<String, Integer, String> {
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
}
@Override
protected void onProgressUpdate(Integer... values) {
// TODO Auto-generated method stub
super.onProgressUpdate(values);
}
@Override
protected String doInBackground(String... params) {
// TODO Auto-generated method stub
String result = null;
try {
HttpClient client = new DefaultHttpClient();
HttpConnectionParams.setConnectionTimeout(client.getParams(), 3000); //Timeout Limit
HttpResponse response;
try {
HttpPost post = new HttpPost(ServerAddress);
Log.v(TAG, "server Addr: "+ServerAddress);
StringEntity se = new StringEntity( json.toString());
se.setContentType(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
post.setEntity(se);
response = client.execute(post);
/*Checking response */
if(response!=null){
HttpEntity e = response.getEntity();
String r =EntityUtils.toString(e);
result = r;
Log.v("checkR", r);
}
} catch(Exception e) {
e.printStackTrace();
Log.v("check", "exception");
Log.v("check", e.getMessage());
//createDialog("Error", "Cannot Estabilish Connection");
}
return result;
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return result;
}
}
现在当你获得数据时，你需要它从json格式解码它。这是一个示例类和一个DECODEJSON函数，尝试根据你自己的要求实现它
package com.example.aimalkhan.vegegardenandroidapp;
/**
* Created by Aimal Khan on 12/28/2015.
*/
import android.util.Log;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.List;
public class Users {
private static String userName;
private static String password;
private static String contactNumber;
private static String emailId;
private static String lat;
public static String longg = "";
private static String address;
public static String getPlantNames() {
return plantNames;
}
public static void setPlantNames(String plantNames) {
Users.plantNames = plantNames;
}
private static String plantNames;
public String getLongg() {
Log.v("checkR", longg + "in users class! - getting long");
return longg;
}
public void setLongg(String longg) {
Log.v("checkR", longg + "in users class! - seting long");
this.longg = longg;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
Users.address = address;
}
public String getLat() {
return lat;
}
public void setLat(String lat) {
this.lat = lat;
}
public String getEmailId() {
return emailId;
}
public void setEmailId(String emailId) {
this.emailId = emailId;
}
public String getContactNumber() {
return contactNumber;
}
public void setContactNumber(String contactNumber) {
this.contactNumber = contactNumber;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getUserName() {
Log.v("checkR", "in users class" + userName);
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
/*var $id="";
var $type="";
var $firstName="";
var $lastName="";
var $contactNumber="";
var $emailId="";
var $address="";
*/
/* public Users(String id,String type)
{
this.id=id;
this.type=type;
}*/
public Users() {
}
public void decodeJson(JSONObject json) {
try {
userName = json.getString("userName");
setUserName(userName);
password = json.getString("userPassword");
setPassword(password);
contactNumber = json.getString("contactInfo");
setContactNumber(contactNumber);
emailId = json.getString("emailID");
Log.v("checkR", emailId + "in users class!");
setEmailId(emailId);
lat = json.getString("userLat");
setLat(lat);
longg = json.getString("userLong");
Log.v("checkR", longg + "in users class!");
address = json.getString("userAddress");
setAddress(address);
Log.v("checkR", address + "in users class!");
setLongg(longg);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static List<String> plantsT;
public void decodeJsonUserPlants(String json) {
String[] arr;
plantsT = new ArrayList<String>();
Log.v("check123",json.toString()+" json");
try {
JSONObject jsonObject = new JSONObject(json);
arr = jsonObject.getString("plantNames").split(",");
for (int i = 0; i < arr.length; i++) {
arr[i] = arr[i].replaceAll("\"", "").replaceAll("\\[", "").replaceAll("\\]", "");
Log.v("check123",arr[i].toString()+" loop");
plantsT.add(arr[i]);
// plantsT.add(arr.toString());
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
//
如果问题仍然存在，请告诉我。