How To Make HTTP POST Request To Server - Android Example

In this example we will learn how to make POST Method request to server in android.

NOTE:

Always call server with the use of thread and handlers, if not using request with thread then server request will lock activity to complete request  , if user will interact with activity before server request complete  then activity  will give ANR (FORCE CLOSE ERROR) problem.

HttpPostExample.java File

      public class HttpPostExample extends Activity {
        
            TextView content;
            EditText fname, email, login, pass;
            String Name, Email, Login, Pass; 
            
            /** Called when the activity is first created. */ 
            @Override
            public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_http_post_example);
                
                content    =   (TextView)findViewById( R.id.content );
                fname      =   (EditText)findViewById(R.id.name);
                email      =   (EditText)findViewById(R.id.email);
                login      =    (EditText)findViewById(R.id.loginname);
                pass       =   (EditText)findViewById(R.id.password);
                
                
                Button saveme=(Button)findViewById(R.id.save);
 
                saveme.setOnClickListener(new Button.OnClickListener(){
 
                    public void onClick(View v)
                    {
                        try{
                            
                                 // CALL GetText method to make post method call
                                GetText();
                         }
                        catch(Exception ex)
                         {
                            content.setText(" url exeption! " );
                         }
                    }
                });  
            }
            
        // Create GetText Metod
      public  void  GetText()  throws  UnsupportedEncodingException
            {
                // Get user defined values
                Name = fname.getText().toString();
                Email   = email.getText().toString();
                Login   = login.getText().toString();
                Pass   = pass.getText().toString();
                
                 // Create data variable for sent values to server  
                
                  String data = URLEncoder.encode("name", "UTF-8") 
                               + "=" + URLEncoder.encode(Name, "UTF-8"); 
 
                  data += "&" + URLEncoder.encode("email", "UTF-8") + "=" 
                              + URLEncoder.encode(Email, "UTF-8"); 
 
                  data += "&" + URLEncoder.encode("user", "UTF-8") 
                              + "=" + URLEncoder.encode(Login, "UTF-8");
 
                  data += "&" + URLEncoder.encode("pass", "UTF-8") 
                              + "=" + URLEncoder.encode(Pass, "UTF-8");
                 
                  String text = "";
                  BufferedReader reader=null;
 
                  // Send data 
                try
                { 
                 
                    // Defined URL  where to send data
                    URL url = new URL("/media/webservice/httppost.php");
                    
                 // Send POST data request
 
                  URLConnection conn = url.openConnection(); 
                  conn.setDoOutput(true); 
                  OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream()); 
                  wr.write( data ); 
                  wr.flush(); 
             
                  // Get the server response 
                  
                reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
                StringBuilder sb = new StringBuilder();
                String line = null;
               
                // Read Server Response
                while((line = reader.readLine()) != null)
                    {
                           // Append server response in string
                           sb.append(line + "\n");
                    }
                   
                   
                    text = sb.toString();
                }
                catch(Exception ex)
                {
                    
                }
                finally
                {
                    try
                    {
        
                        reader.close();
                    }

                    catch(Exception ex) {}
                }
                     
                // Show response on activity
                content.setText( text  );
               
            }
        
        }

Define permission in AndroidManifest.xml File

Server file httppost.php

This file will get POST method request and send response.

 <?php 
 
        $name   = urldecode($_POST['name']);
        $user   = urldecode($_POST['user']);
        $email  = urldecode($_POST['email']);
        $pass   = urldecode($_POST['pass']);
        
        print " ==== POST DATA =====
        Name  : $name 
        Email : $email
        User  : $user 
        Pass  : $pass"; 
 
  ?>