Android Post Request To Php

I try to develope an Android application. In this application, I need to send a POST request to a PHP page. My code is at Java side: DefaultHttpClient httpclient = new DefaultHttp

Solution 1:

Use the following code. It is working fine

publicclassHttpClient {
    privatestaticfinalStringTAG="HttpClient";

    publicstatic JSONObject SendHttpPost(String URL, JSONObject jsonObjSend) {

    try {
        DefaultHttpClienthttpclient=newDefaultHttpClient();
        HttpPosthttpPostRequest=newHttpPost(URL);

        StringEntity se;
        se = newStringEntity(jsonObjSend.toString());

        httpPostRequest.setEntity(se);
        httpPostRequest.setHeader("Accept", "application/json");
        httpPostRequest.setHeader("Content-type", "application/json");
        httpPostRequest.setHeader("Accept-Encoding", "gzip"); 

        longt= System.currentTimeMillis();
        HttpResponseresponse= (HttpResponse) httpclient.execute(httpPostRequest);
        Log.i(TAG, "HTTPResponse received in [" + (System.currentTimeMillis()-t) + "ms]");

        HttpEntityentity= response.getEntity();

        if (entity != null) {
            InputStreaminstream= entity.getContent();
            HeadercontentEncoding= response.getFirstHeader("Content-Encoding");
            if (contentEncoding != null && contentEncoding.getValue().equalsIgnoreCase("gzip")) {
                instream = newGZIPInputStream(instream);
            }

            String resultString= convertStreamToString(instream);
            instream.close();
            resultString = resultString.substring(0,resultString.length()-1); 

            JSONObjectjsonObjRecv=newJSONObject(resultString);
            Log.i(TAG,"<JSONObject>\n"+jsonObjRecv.toString()+"\n</JSONObject>");

            return jsonObjRecv;
        } 

    }
    catch (Exception e)
    {
        Log.e("Exception", "Exception");
        e.printStackTrace();
    }
    returnnull;
}


privatestatic 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();
    }
}

Solution 2:

My problem was that I want to run my code in application main thread and main thread doesn't allow that. There are a few ways to solve this problem,

1. Using AsyncTask to perform background operation
2. Run the code in a new thread

3. Enable network operation in MainActivity and this is what I choose for now by

   StrictMode.ThreadPolicypolicy=newStrictMode.ThreadPolicy.Builder().
                                                   detectNetwork().build();
   StrictMode.setThreadPolicy(policy);
   

UPDATE

Because of the name of the question I want to share how to make Http call in android in order to guide people. There are some apis:

• Volley
• Retrofit

And there is a training in

• Android Developer