(Chilkat for Android™ API) HTTP POST JSON

Demonstrates how to send a JSON POST and get the JSON response.

Download: Chilkat for Android™ Java Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {
  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    TextView tv = new TextView(this);
    String outStr = "";

    CkHttpRequest req = new CkHttpRequest();
    CkHttp http = new CkHttp();

    boolean success;

    //  Any string unlocks the component for the 1st 30 days.
    success = http.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        outStr += http.lastErrorText() + "\n";
        tv.setText(outStr);
        setContentView(tv);
        return;
    }

    //  This example duplicates the HTTP POST shown at
    //  http://json.org/JSONRequest.html

    //  Specifically, the request to be sent looks like this:
    //  
POST /request HTTP/1.1
Accept: application/jsonrequest
Content-Encoding: identity
Content-Length: 72
Content-Type: application/jsonrequest
Host: json.penzance.org

{"user":"doctoravatar@penzance.com","forecast":7,"t":"vlIj","zip":94089}


    //  First, remove default header fields that would be automatically
    //  sent.  (These headers are harmless, and shouldn't need to
    //  be suppressed, but just in case...)
    http.put_AcceptCharset("");
    http.put_UserAgent("");
    http.put_AcceptLanguage("");
    //  Suppress the Accept-Encoding header by disallowing
    //  a gzip response:
    http.put_AllowGzip(false);

    //  If a Cookie needs to be added, it may be added by calling
    //  AddQuickHeader:
    http.AddQuickHeader("Cookie","JSESSIONID=1234");

    String jsonText;
    jsonText = "{\"user\":\"doctoravatar@penzance.com\",\"forecast\":7,\"t\":\"vlIj\",\"zip\":94089}";

    //  To use SSL/TLS, simply use "https://" in the URL.

    //  IMPORTANT: Make sure to change the URL, JSON text,
    //  and other data items to your own values.  The URL used
    //  in this example will not actually work.

    CkHttpResponse resp;
    resp = http.PostJson("http://json.penzance.org/request",jsonText);
    if (resp == null ) {
        outStr += http.lastErrorText() + "\n";
    }
    else {
        //  Display the JSON response.
        outStr += resp.bodyStr() + "\n";
    }


    tv.setText(outStr);
    setContentView(tv);
  }

  static {
      // Important: Make sure the name passed to loadLibrary matches the shared library
      // found in your project's libs/armeabi directory.
      //  for "libchilkat.so", pass "chilkat" to loadLibrary
      //  for "libchilkatemail.so", pass "chilkatemail" to loadLibrary
      //  etc.
      // 
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}