Problems With A Build_httpbody() // Httppost.setentity() - Android

I develop AndroidApps with AndroidStudio I start to do a simple HttpPost Request and I had a problems, all post that I could find do this: private void CheckLoguin_Request(String U

Solution 1:

Updated 2016

Using HttpURLConnection class we need to open BufferedWritter to insert our entity values as the following code:

//Declaration of variablesprivate List<NameValuePair> ListOfValues;
...

publicCheck_Loguin_Request(Context cx,String url, List<NameValuePair> ListOfValues)
{
    this.cx = cx;
    this.Url = url;
    this.ListOfValues= ListOfValues;
}

@Overrideprotected String doInBackground(String... strings) {

    //Declaration of variablesInputStreamis=null;
    StringResult="";

    URLurll=newURL(url);
    HttpURLConnectionconn= (HttpURLConnection) urll.openConnection();
    conn.setReadTimeout(10000);
    conn.setConnectTimeout(15000);
    conn.setRequestMethod("POST");
    conn.setDoInput(true);
    conn.setDoOutput(true);

    OutputStreamos= conn.getOutputStream();
    BufferedWriterwriter=newBufferedWriter(newOutputStreamWriter(os, "UTF-8"));
    writer.write(Build_HttpBody(ListOfValues));
    writer.flush();
    writer.close();
    os.close();

    // Starts request
    conn.connect();
    intResponseCode= conn.getResponseCode();

    if (ResponseCode == 200) {
        is = conn.getInputStream();
        StringEntityResult= ReadResponse_HttpURLConnection(is);
    } 
    else {
        thrownewRuntimeException("Invalid Status Code");
    }
}

---

Attention the DefaultHttpClient class is deprecated (2011)

For more info following this link.

Try to use this following code, remember for this case always use AsyncTask:

privateclassCheck_Loguin_RequestextendsAsyncTask <String,Void,String>{

    Context cx;
    String Url;
    List<NameValuePair> BodyRequest_Elements;

    publicCheck_Loguin_Request(Context cx,String url, List<NameValuePair> ListOfValues)
    {
        this.cx = cx;
        this.Url = url;
        this.BodyRequest_Elements = ListOfValues;
    }

    private String convertStreamToString(InputStream is) {

        BufferedReaderreader=newBufferedReader(newInputStreamReader(is));
        StringBuildersb=newStringBuilder();

        Stringline=null;
        try {
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return sb.toString();
    }

    @Overrideprotected String doInBackground(String... strings) {

        //Declaration of variables
        DefaultHttpClient httpClient;
        HttpPostRequest=newHttpPost(url_Loguin);
        HttpResponse Response;
        HttpParamshttpParameters=newBasicHttpParams();
        httpParameters.setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);

        // Set the timeout in milliseconds until a connection is established.// The default value is zero, that means the timeout is not used.inttimeoutConnection=3000;
        HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection);
        // Set the default socket timeout (SO_TIMEOUT)// in milliseconds which is the timeout for waiting for data.inttimeoutSocket=5000;
        HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);
        httpClient = newDefaultHttpClient(httpParameters);


        try {
            HttpEntityentity=newUrlEncodedFormEntity(BodyRequest_Elements);
            Request.setHeader(entity.getContentType());
            Request.setEntity(entity);

            Response = httpClient.execute(Request);

            if(Response.getStatusLine().getStatusCode() == 200){
                StringEntityResult= EntityUtils.toString(Response.getEntity());
                //HttpEntity EntityResult = Response.getEntity();//InputStream iStream = EntityResult.getContent();//JSONObject json = new JSONObject(convertStreamToString(iStream));

                EntityResult = EntityResult.replaceAll("[()]", "");
                JSONObjectjson=newJSONObject(EntityResult);

                StringResult= json.optString("code").toString();
                return Result;
            }
            else{
                thrownewRuntimeException("Invalid Status Code");
            }
        }
        catch (Exception ex){
            Log.getStackTraceString(ex);
            return ex.toString();
        }
    }
}

Solution 2:

You are obviously not handling the IO exceptions being thrown from the constructor:

see: Android docs on UrlEncodedFormEntity

What puzzles me is that your IDE is not reporting this, or how this code even compiles, let alone runs/debugs.

Edit: If you are new at this stuff, maybe it would be worth to take a look at: Android Volley , which is a quite simple yet effective library developed by Google for Android networking.