Develop Reference

how to use URL to post data with HttpClient in android

I have to send/post some data to .svc Web Service that basically connect to remote database. I'm using JSONStringer to send the data but every time response status is false. My data is not sent. How to use HttpPost in Android . Can someone help me how to solve this .
Here is my webservice code
String namespace = "http://103.24.4.60/xxxxx/MobileService.svc";
public void ActivityUpload( final String strCurrentDateTime, final String strTitle, final String replaceDescChar, final String editedHashTag)
{
new AsyncTask<String, Void, String>()
{
#Override
protected String doInBackground(String... arg0)
{
String line = "";
try
{
Log.e("ActionDate "," = "+ strCurrentDateTime);
Log.e("ActivityId"," = "+strActivityId);
Log.e("UserId"," = "+str_UserId);
Log.e("ObjectId"," = "+strVessId);
Log.e("Name"," = "+strTitle);
Log.e("Remark"," = "+replaceDescChar);
Log.e("Status"," = "+"PENDING");
Log.e("Type"," = "+strType);
Log.e("starflag"," = "+0);
Log.e("HashTag"," = "+editedHashTag);
Log.e("Authentication_Token"," = "+str_Authentication_Token);
// make web service connection
HttpPost request = new HttpPost(namespace + "/Upd_Post_Activity");
request.setHeader("Accept", "application/json");
request.setHeader("Content-type", "application/json");
// Build JSON string
JSONStringer TestApp = new JSONStringer().object()
.key("ActionDate").value(strCurrentDateTime)
.key("ActivityId").value(strActivityId)
.key("UserId").value(str_UserId)
.key("ObjectId").value(strVessId)
.key("Name").value(strTitle)
.key("Remark").value(replaceDescChar)
.key("Status").value("PENDING")
.key("Type").value(strType)
.key("starflag").value("0")
.key("HashTag").value(editedHashTag)
.key("Authentication_Token").value(str_Authentication_Token).endObject();
StringEntity entity = new StringEntity(TestApp.toString());
Log.d("****Parameter Input****", "Testing:" + TestApp);
request.setEntity(entity);
// Send request to WCF service
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpResponse response = httpClient.execute(request);
Log.d("WebInvoke", "Saving: " + response.getStatusLine().toString());
// Get the status of web service
BufferedReader rd = new BufferedReader(new InputStreamReader(
response.getEntity().getContent()));
// print status in log
while ((line = rd.readLine()) != null) {
Log.d("****Status Line***", "Webservice: " + line);
}
} catch (Exception e) {
e.printStackTrace();
}
return line;
}
}.execute();
}
Here is input Parameter.
****Parameter Input****﹕ Testing:{"ActionDate":"2016-01-21%2014:20:43%20PM","ActivityId":"120160119180421058","UserId":"125","ObjectId":"1","Name":"Title2","Remark":"Test%20two","Status":"PENDING","Type":"3","starflag":"0","HashTag":"990075","Authentication_Token":"6321D079-5B28-4F3F-AEE7-D59A1B9EFA59"}
Thanks in advanced.

realize android httpclients are in process of deprecation ( in favor of httpsurlconnection ) but, these httpclients are still used pretty widely. On gradle builds, regard the deprication, and with small dependency lib tweeks , httpclient may be used for some time still.
( still gonna use httpclient ? )
Put android aside for a min.
learn how to CURL with JSON body for tests that show you what you EXACT JSON in body and exact HEADERS you will need to get success http result to a post ... ref here
Once you have that you can then go about transferring your curl test's components over to android.httpclient.exec.POST using httpclient of your choice.
Set the same group of Headers you had over in curl tests in your android post. apache.httpclient sample
2.a. make sure that default list of headers from the clients 'request' constructor does NOT include by default some headers you DO NOT want... In order to assure of this ,you probably will need to turn on HEADER logging for your client.... java example logger . remove unnecessary headers included by the framework constructor of POST.
2.b android logger (WIRE, HEADERS) is diff from and may take some digging , depend on what client is in use.
with the same headers as curl tests, set the http.posts request.entity to either a string or a properly encoded array of bytes containing the same JSON body used in the curl tests.
3.A. depending on the JSON lib, create your message objects and then convert the objects to some friendly type for enclosure in an entity for the post ie use a 'writer' to convert objects to a serialized string with the JSON.
reqRole = new ObjectMapper().createObjectNode();
reqRole.put("__type", "Pointer");
reqRole.put("className", "_Role");
reqRole.put("objectId", roleId);
rootOb.put("requestedRole", reqRole);
rootOb.put("requestedBy",usersArr);
StringWriter writer = new StringWriter();
try {
new ObjectMapper().writeValue(writer, rootOb)
..
String http-post-str=writer.toString();
3.B. wrap the string with json in the POST request...
httpPost.setEntity(new StringEntityHC4(http-post-str));
exec the request and youll get the same results you got in curl because the headers are same or nearly same and the body is the same , encoded string of json. same input = same result

Trouble sending JSON Post Android

It has been a while since I programmed for Android and I have lost all my previous work which had the code in it I am having problems with. I am developing an app for both Android and iPhone which connect to the same server to download data. All is well in the iPhone version but on Android when I hit the server with the post data containing the method name I would like to to run on the server it seems that the data is not added to the request.
Why is the POST not working in this request for Android but does for the iPhone version of the app?
Here is the code I am using:
public static void makeRequest() throws Exception {
Thread t = new Thread() {
public void run() {
Looper.prepare(); //For Preparing Message Pool for the child Thread
HttpClient client = new DefaultHttpClient();
HttpConnectionParams.setConnectionTimeout(client.getParams(), 10000);
HttpResponse response;
HttpEntity entity;
JSONObject json = new JSONObject();
try {
HttpPost post = new HttpPost("http://divisi.co.uk/rest/requesthandler.php");
json.put("method", "getEventListData");
StringEntity se = new StringEntity(json.toString());
se.setContentType(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
post.setEntity(se);
response = client.execute(post);
entity = response.getEntity();
String retSrc = EntityUtils.toString(entity);
JSONObject result = new JSONObject(retSrc); //Convert String to JSON Object
if(result.getString("SC") == "200"){
JSONArray data = result.getJSONArray("data");
}
else{
}
} catch(Exception e) {
e.printStackTrace();
}
Looper.loop(); //Loop in the message queue
}
};
t.start();
}
The response I get mack from the server is:
{"data":{"scalar":""},"SC":405,"timestamp":1363788265}
Meaning the method name was not found, i.e. not posted in my request to the server.

heres an example of how i do things like this:
HttpClient httpClient = new DefaultHttpClient();
HttpPost postRequest = new HttpPost("http://divisi.co.uk/rest/requesthandler.php");
MultipartEntity reqEntity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
reqEntity.addPart(new FormBodyPart("method", new StringBody("getEventListData")));
reqEntity.addPart(new FormBodyPart("NEED_A_KEY_HERE", new StringBody("" + json.toString())));
postRequest.setEntity(reqEntity);
HttpResponse response = httpClient.execute(postRequest);
JSONObject responseDict = new JSONObject(EntityUtils.toString(response.getEntity()));

allow this is your "http://divisi.co.uk/rest/requesthandler.php" page code, then in android you can use this... you don't allow post in your URL,

use fiddler on your sever side. see if the http message is correct. it seems your sever side problem, can you show us your sever side code which receive and parse json.

If the server can't read your request try to remove:
se.setContentType(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
It will use the mime type defaults HTTP.PLAIN_TEXT_TYPE i.e. "text/plain".
I don't see any other possibility, if your code is the one you posted and not a more complicated input JSON object.

Your code to set the POST body may be just fine. I think the problem may be with your web service. Try using something like Rested or curl to manually make the call to your server. I made exactly the same request you are making, including with and without the POST body, and I got the same response from your server:
{"data":{"scalar":""},"SC":405,"timestamp":1365704082}
Some things that may be tripping you up:
JSONObject result = new JSONObject(retSrc); //Convert String to JSON Object
if(result.getString("SC") == "200"){
JSONArray data = result.getJSONArray("data");
}
Here, you are comparing the string "405" to "200" using ==, when you should first do a null check and then use .equals("200") instead. Or, use result.getInt("SC") == 200 since this is an integer type in your response JSON.
Also, the "data" entity from your server response is not actually coming back as a JSON array. You should use getJSONObject("data") instead.
Additionally, it's always a good idea to externalize your strings.
Here's how the code should look:
public static final String JSON_KEY_SC = "SC";
public static final String JSON_KEY_DATA = "data";
...
JSONObject result = new JSONObject(retSrc); //Convert String to JSON Object
String sc = result.getString(JSON_KEY_SC);
if (sc != null && sc.equals("200")) {
JSONObject data = result.getJSONObject(JSON_KEY_DATA);
}
else {
...
}

Sending JSON From Android to PHP

I've been struggling a bit on sending JSON objects from an application on android to a php file (hosted locally). The php bit is irrelevant to my issue as wireshark isn't recording any activity from my application (emulation in eclipse/ADK) and it's almost certainly to do with my method of sending:
try {
JSONObject json = new JSONObject();
json.put("id", "5");
json.put("time", "3:00");
json.put("date", "03.04.12");
HttpParams httpParams = new BasicHttpParams();
HttpClient client = new DefaultHttpClient(httpParams);
//
//String url = "http://10.0.2.2:8080/sample1/webservice2.php?" +
// "json={\"UserName\":1,\"FullName\":2}";
String url = "http://localhost/datarecieve.php";
HttpPost request = new HttpPost(url);
request.setEntity(new ByteArrayEntity(json.toString().getBytes(
"UTF8")));
request.setHeader("json", json.toString());
HttpResponse response = client.execute(request);
HttpEntity entity = response.getEntity();
// If the response does not enclose an entity, there is no need
if (entity != null) {
InputStream instream = entity.getContent();
}
} catch (Throwable t) {
Toast.makeText(this, "Request failed: " + t.toString(),
Toast.LENGTH_LONG).show();
}
I've modified this from an example I found, so I'm sure I've taken some perfectly good code and mangled it. I understand the requirement for multi-threading so my application doesn't hang and die, but am unsure about the implementation of it. Would using Asynctask fix this issue, or have I missed something else important?
Thankyou for any help you can provide.

Assuming that you are using emulator to test the code, localhost refers to the emulated environment. If you need to access the php hosted on your computer, you need to use the IP 10.0.2.2 or the LAN IP such as 192.168.1.3. Check Referring to localhost from the emulated environment
You can refer to Keeping Your App Responsive to learn about running your long running operations in an AsyncTask

you should use asynctask or thread, because in higher versions of android it doesn't allow long running task like network operations from ui thread.
here is the link for more description

Using HttpGet returning complete HTML code

I am trying to invoke a private web-service in which there's one link I've to access using GET method. While using the direct URL on browser (needs to login first), I get the data in JSON format. The URL I am invoking is like this
http://www.example.com/trip/details/860720?format=json
The url is working fine, but when I invoke this using HttpGet, I am getting the HTML coding of the webpage, instead of the JSON String. The code I am using is as follows:
private String runURL(String src,int id) { //src="http://www.example.com/trip/details/"
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpget = new HttpGet(src);
String responseBody="";
BasicHttpParams params=new BasicHttpParams();
params.setParameter("domain", token); //The access token I am getting after the Login
params.setParameter("format", "json");
params.setParameter("id", id);
try {
httpget.setParams(params);
HttpResponse response = httpclient.execute(httpget);
responseBody = EntityUtils.toString(response.getEntity());
Log.d("runURL", "response " + responseBody); //prints the complete HTML code of the web-page
} catch (Exception e) {
e.printStackTrace();
}
return responseBody;
}
Can you tell me what am I doing wrong here??

Try specify Accept & Content-Type in you http header:
httpget.setHeader("Accept", "application/json"); // or application/jsonrequest
httpget.setHeader("Content-Type", "application/json");
Note that you can use tools like wireshark capture and analyse the income and outcome http package, and figure out the exact style of the http header that returns your json response from a standard browser.
Update:
You mentioned need login first when using browser, the html content returned is probably the login page (if use basic authentication type, it returns a short html response with status code 401, so a modern browser knows how to handle, more specifically, pop up login prompt to user), so the first try would be checking the status code of your http response:
int responseStatusCode = response.getStatusLine().getStatusCode();
Depend on what kind of authentication type you use, you probably need specify login credentials in your http request as well, something like this (if it is a basic authentication):
httpClient.getCredentialsProvider().setCredentials(
new AuthScope("http://www.example.com/trip/details/860720?format=json", 80),
new UsernamePasswordCredentials("username", "password");

Android: Why is HttpPost request not going through proxy?

I've set up a new Access Point on my emulator so that I can view traffic in Fiddler by following the instructions here: http://aurir.wordpress.com/2010/03/22/tutorial-getting-android-emulator-working-with-fiddler-http-proxy-tool/
This works for the browser requests from the Emulator but the HttpPost request in my application is now visible in Fiddler.
Here's the code I'm using:
private InputStream post(String url, Hashtable<String, String> postvariables) {
DefaultHttpClient httpClient = new DefaultHttpClient();
URI uri;
InputStream data = null;
try {
uri = new URI(url);
HttpPost method = new HttpPost(uri);
method.setHeader("Content-Type","application/json");
String param = new String();
Enumeration<String> e = postvariables.keys();
while(e.hasMoreElements())
{
String key = e.nextElement();
param = param + key + "=" + postvariables.get(key);
if(e.hasMoreElements()) {
param = param + "&";
}
}
Log.i("RestClient",url + param);
HttpEntity entity = new StringEntity(param);
method.setEntity(entity);
HttpResponse response = httpClient.execute(method);
data = response.getEntity().getContent();
} catch (Exception e) {
e.printStackTrace();
}
return data;
}
Any idea what I'm doing wrong?

I have never tried this explicitly, but have seen many reports that redirecting emulator traffic by changing the APN only affects the Browser. You might have better luck running the emulator instance with the option -http-proxy <proxy>. Look here, under Emulator Startup Options (Network) for more:
http://developer.android.com/guide/developing/tools/emulator.html
$0.02: We use Charles to debug web services and booting up the emulator in this fashion works for all traffic.
Hope that helps!