Ok so I created a method in a new class and called it from my activity in try catch block, and when I call it and pass my string value my issue appeared...
My issue started after executing the below method after:
HttpResponse httpresponse = httpclient.execute(httppostreq);
It went to the catch (IOException e) in my activity and when I tried to print the response string it gave me the a response from the server !!!!
So the issue is when I try to pass value to the POST it should return some data but it failed and it's returning the empty message from the server
Hint :
The empty message will appear if there were no values
jsonobj.put("screenType", requestString);
So did i passed the value or not ??? and why it's causing exception ??
public void postData(String requestString) throws JSONException, ClientProtocolException, IOException {
// Create a new HttpClient and Post Header
DefaultHttpClient httpclient = new DefaultHttpClient();
JSONObject jsonobj = new JSONObject();
jsonobj.put("screenType", requestString);
//jsonobj.put("old_passw", "306");
HttpPost httppostreq = new HttpPost("mysite.org");
StringEntity se = new StringEntity(jsonobj.toString());
se.setContentType("application/json;charset=UTF-8");
se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,"application/json;charset=UTF-8"));
httppostreq.setEntity(se);
HttpResponse httpresponse = httpclient.execute(httppostreq);
Log.i("in try", httpresponse.toString());
String responseText=null;
try {
responseText=EntityUtils.toString(httpresponse.getEntity());
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
Log.i("in Exception",e.toString());
Log.i("arse exception", httpresponse.toString());
}
}
i also added the internet permisssion
<uses-permission android:name="android.permission.INTERNET" />
You can't make network requests on the main thread. You'll get the error you are seeing now. You need to use either AsyncTask or you need to create a new thread. Personally, I'd use AsyncTask. When you use AsyncTask you can use the onPostExecute method to return the value to the main thread.
See : NetworkOnMainThreadException
As vincent said you can't execute network requests in the UI thread, it will give you a weird exception, but rather than using an AsyncTask which will be destroyed if your activity rotates as this Infographic shows, I can recommend you to use Robospice its the best network framework I have used and it's very easy to use, Good Luck.
Related
Android HTTP PUT not sending JSON request to server resulting in HTTP 405 Method not allowed.
Below is my async task background code
HttpClient httpclient = new DefaultHttpClient();
HttpPut httpPut = new HttpPut("URL");
String jsonresponse = "";
try {
StringEntity se = new StringEntity(gson.toJson(resultPojo).toString());
se.setContentType("application/json;charset=UTF-8");//text/plain;charset=UTF-8
se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,"application/json;charset=UTF-8"));
httpPut.setEntity(se);
httpPut.setHeader("Accept", "application/json");
httpPut.setHeader("Content-type", "application/json");
HttpResponse response = httpclient.execute(httpPut);
HttpEntity httpEntity = response.getEntity();
jsonresponse = EntityUtils.toString(httpEntity);
System.out.println("res .... "+jsonresponse);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
serverside code :
#POST
#Path("{id}")
#Produces(MediaType.APPLICATION_JSON)
#Consumes(MediaType.APPLICATION_JSON)
public Response submitUserResponse(#PathParam("userId") int userId,
#PathParam("id") int id, List<ResultPojo> responses) {
try {
//core logic goes here
return Response.status(Response.Status.CREATED).build();
} catch (Exception e) {
e.printStackTrace();
return Response.status(Response.Status.INTERNAL_SERVER_ERROR).build();
}
}
Alright just like what was discussed it is most likely a mismatch different HTTP methods, in this case A Put and a post, whenever you ever encounter that HTTP code(405) do perform a validation on the methods you used, it happens.405 errors often arise with the POST method. You may be trying to introduce some kind of input form on the Web site, but not all ISPs allow the POST method necessary to process the form.A request method is not supported for the requested resource; for example, a GET request on a form that requires data to be presented via POST, or a PUT request on a read-only resource.
In my android application I try to send a json object to a distant server, when I run it I get an error in httpclient.execute(httpPost)
This is a part of my code.
public static String GET(String url , JSONObject js){
try {
HttpPost httpPost = new HttpPost(url);
httpPost.addHeader("Authorization", "Basic **********");
httpPost.setEntity(new StringEntity(js.toString()));
HttpClient httpclient = new DefaultHttpClient();
httpclient.execute(httpPost);
} catch (Exception e) {
Log.i("Console", "Error");
}
Any help please.
I guess your Problem is, that you try to run your Network Request from your Main Thread.
I would discourage you to use the Apache HTTP Client at all.
It became deprecated for Marshmallow, see here
Maybe try OkHttp. It offers you the possibility to run a request asynchronously.
I work on my first Android application and I have some great problems with trying to make HTTP POST request and receive response. These are few facts:
I have INTERNET permission in AndroidManifest.xml:
<uses-permission android:name="android.permission.INTERNET" />
I tried many solutions. Solutions with URLConnection or HttpURLConnection don't work because they return empty string. Solution with HttpClient and HttpPost fails on execute() - I was googling for an hour but didn't find out how to fix that.
There is internet connection. But I don't know how to fix my problem and finally to send HTTP POST request.
upd: e.g. this code makes my program crash:
public static APIResponse getResponse(String action, Map<String, String> params) throws IOException {
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://google.com");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
nameValuePairs.add(new BasicNameValuePair("id", "12345"));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
} catch (IOException e) {
// TODO Auto-generated catch block
}
return null;
}
upd 2: it works on my phone but doesn't work on emulator! how to fix that behaviour on emulator?
upd 3: fixed.
Look at the example for HTTP Post
You should also employ fiddler2 to help debug your HTTP messages.
Also please note that you are not catching all exceptions properly ... you can add a generic catch statement at the end to prevent your app from crashing and help you figure out where the problem lies. Could be a timeout or similar.
I have just a curiosity question. I have an HttpPost request in Android that looks something like this:
HttpClient client = new DefaultHttpClient();
HttpPost post = new HttpPost(getString(R.string.url));
//This code does not work
HttpParams params = new BasicHttpParams();
params.setParameter("type", "20");
post.setParams(params);
try {
HttpResponse response = client.execute(post);
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
On my server side, I have a servlet that listens for requests and parses the parameters:
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Enumeration en = request.getParameterNames();
while (en.hasMoreElements()){
System.out.println(en.nextElement());
}
}
When I execute this code, the servlet does not see any parameters at all. But if I replace the whole "parameter" chunk with this code:
//This code works
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(5);
nameValuePairs.add(new BasicNameValuePair("type", "20"));
try {
post.setEntity(new UrlEncodedFormEntity(nameValuePairs));
} catch (UnsupportedEncodingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
My servlet can parse parameters. It's not a problem, I'm just going to use the entity but my question is, why can't my servlet getthe parameters from the first code chunk? What's wrong with setParams? Why can the servlet see parameters if I make them an entity?
In HTML when we have something like "http://host/path?user=uname&passwd=pass", we call the part (user=uname&passwd=pass) after the question mark "form data".The "form data" can be attached to the end of the URL after a question mark (as above), for GET requests, or sent to the server on a separate line, for POST requests.The "form data" are split to parameters. The parameters are separated by & when we use GET.
In our case the HttpPost and HttpGet classes extend the AbstractHttpMessage which implements the setParams method. This method is same for GET and POST but does the job only for GET! In the case of GET the parameters are put in the URL. In the case of POST you need to set the entity for the parameters to be on a "separate line".
On the server side when using servlets the getParameters is clever enough to find the parameters for GET and POST.
Thats why on the server side we do not need to change the code for getting the parameters!
Hope I helped!
I'm trying to cancel my AsyncTask when connecting to the server fails. I tried cancel(), but the onPostExecute() method still gets called, instead of onCancelled().
This is what I have inside doInBackground():
protected String doInBackground(String... params) {
Log.i("ping", "doInBackground() started");
DefaultHttpClient client = new DefaultHttpClient();
HttpConnectionParams.setConnectionTimeout(client.getParams(), 15000);
HttpResponse response;
HttpEntity entity;
try {
HttpPost post = new HttpPost("http://192.168.1.6/ping/login.php");
List<NameValuePair> nvps = new ArrayList<NameValuePair>();
nvps.add(new BasicNameValuePair("username", getEmail()));
nvps.add(new BasicNameValuePair("password", getPassword()));
post.setHeader("Content-Type", "application/x-www-form-urlencoded");
post.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
response = client.execute(post);
entity = response.getEntity();
InputStream iStream = entity.getContent();
read(iStream);
iStream.close();
if(entity != null)
entity.consumeContent();
Log.i("ping", "doInBackground() vervolgd");
} catch (Exception e) {
e.printStackTrace();
Log.e("tvsping", "Exception: " + e.getMessage());
cancel(true);
}
return null;
}
I'm trying to see what happens when the server can't be reached (I'm shutting it down, so there's no way my phone is getting any response) and I get IOException: the connection was reset.
Any ideas how I should check if the connection isn't made?
update
I solved this like Tanmay suggested, with a boolean. But I have another problem:
Every time doInBackground() is called it takes about three minutes to stop, when it can't find the servers. Everything is fine when it can reach the server, but I can't have this taking 3 minutes before the user is notified of anything (I could do a background process, but still a 3 minute wating bar is no good neither)
Any ideas what is wrong with my code? This can't be normal, right?
From doInBackground() method you are returning a String .You can return null if your HTTPPost fails.And then in onPostExecute() method just check what are you getting, if the String is null dont do anything which you really want and on successful running do your UI work
Hope this will help you.
HttpHost target = new HttpHost("192.168.2.3", 80);
HttpPost post = new HttpPost("/ping/login.php");
response = client.execute(target, post);
This solved the slow server response for me.