How do I implement the android http post method

 
package com.hl; 

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.Iterator; 
import java.util.Map; 
import java.util.Set; 

import org.apache.http.HttpEntity; 
import org.apache.http.HttpResponse; 
import org.apache.http.client.entity.UrlEncodedFormEntity; 
import org.apache.http.client.methods.HttpPost; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.apache.http.message.BasicNameValuePair; 

import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.TextView; 

public class SimplePOST extends Activity { 
private TextView show; 
private EditText txt; 
private Button btn; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.main); 
show = (TextView)findViewById(R.id.show); 
txt = (EditText)findViewById(R.id.txt); 
btn = (Button)findViewById(R.id.btn); 
btn.setOnClickListener(new OnClickListener() { 

@Override 
public void onClick(View v) { 
dopost(txt.getText().toString()); 

} 
}); 
} 

private void dopost(String val){ 
// Encapsulate data  
Map<String, String> parmas = new HashMap<String, String>(); 
parmas.put("name", val); 

DefaultHttpClient client = new DefaultHttpClient();//http The client  
HttpPost httpPost = new HttpPost("http://mhycoe.com/test/post.php"); 

ArrayList<BasicNameValuePair> pairs = new ArrayList<BasicNameValuePair>(); 
if(parmas != null){ 
Set<String> keys = parmas.keySet(); 
for(Iterator<String> i = keys.iterator(); i.hasNext();) { 
String key = (String)i.next(); 
pairs.add(new BasicNameValuePair(key, parmas.get(key))); 
} 
} 

try { 
UrlEncodedFormEntity p_entity = new UrlEncodedFormEntity(pairs, "utf-8"); 
/* 
*  will POST Data into the HTTP request  
*/ 
httpPost.setEntity(p_entity); 
/* 
*  Issue actual HTTP POST request  
*/ 
HttpResponse response = client.execute(httpPost); 
HttpEntity entity = response.getEntity(); 
InputStream content = entity.getContent(); 
String returnConnection = convertStreamToString(content); 
show.setText(returnConnection); 
} catch (IllegalStateException e) { 
e.printStackTrace(); 
} catch (IOException e) { 
e.printStackTrace(); 
} 

} 

private String convertStreamToString(InputStream is) { 
BufferedReader reader = new BufferedReader(new InputStreamReader(is)); 
StringBuilder sb = new StringBuilder(); 
String line = null; 
try { 
while ((line = reader.readLine()) != null) { 
sb.append(line); 
} 
} catch (IOException e) { 
e.printStackTrace(); 
} finally { 
try { 
is.close(); 
} catch (IOException e) { 
e.printStackTrace(); 
} 
} 
return sb.toString(); 
} 
}