POSTing an HTTP request is an essential and basic step for all those Android applications that need to exploit internet resources. The only thing you will need to do is implement the function that will execute the request.
Steps
Step 1. Enter internet access permissions inside the manifest file by adding the following lines of code to the 'AndroidManifest
xml '. This way your application can use any internet connection active on the device.
Step 2. Create the 'HttpClient' and 'HttpPost' objects, they will be responsible for executing the 'POST' request
The 'address' object of type 'String' present in the code represents the destination on the web of your 'POST', and can be for example the address of a PHP page.
HttpClient client = new DefaultHttpClient ();
HttpPost post = new HttpPost (address);
Step 3. Set the data that will be sent from your 'POST'
You can do this by creating and enhancing a list of 'NameValuePair' as the entity of your 'HttpPost' object. Make sure you handle the 'UnsupportedEncodingException' which can be raised by the 'HttpPost.setEntity ()' method.
List pairs = new ArrayList ();
pairs.add (new BasicNameValuePair ("key1", "value1"));
pairs.add (new BasicNameValuePair ("key2", "value2"));
post.setEntity (new UrlEncodedFormEntity (pairs));
Step 4. Now all you have to do is perform your 'POST'
Your HTTP POST request will generate as a result an object of type 'HttpResponse' containing the data, which will then be extracted and interpreted ('parsing'). Make sure you handle the 'ClientProtocolException' and 'IOException' exceptions, which can be raised by the 'execute ()' method in case of an error.
HttpResponse response = client.execute (post);
