Android Add Insert Save data to Server Database (PHP+MySQL) (Web Server)

package com.myapp;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
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 org.json.JSONException;
import org.json.JSONObject;

import android.os.Bundle;
import android.os.StrictMode;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.util.Log;
import android.view.View;
import android.view.Menu;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
	
    
    @SuppressLint("NewApi")
	@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Permission StrictMode
        if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }
        
        // btnSave
        final Button btnSave = (Button) findViewById(R.id.btnSave);
        // Perform action on click
        btnSave.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	if(SaveData())
            	{
            		// When Save Complete
            	}
            }	
        });
        
    }
    
    public boolean SaveData()
    {
    	
        // txtUsername,txtPassword,txtName,txtEmail,txtTel
        final EditText txtUsername = (EditText)findViewById(R.id.txtUsername); 
        final EditText txtPassword = (EditText)findViewById(R.id.txtPassword); 
        final EditText txtConPassword = (EditText)findViewById(R.id.txtConPassword); 
        final EditText txtName = (EditText)findViewById(R.id.txtName); 
        final EditText txtEmail = (EditText)findViewById(R.id.txtEmail); 
        final EditText txtTel = (EditText)findViewById(R.id.txtTel); 
        
            
    		// Dialog
        	final AlertDialog.Builder ad = new AlertDialog.Builder(this);

    		ad.setTitle("Error! ");
    		ad.setIcon(android.R.drawable.btn_star_big_on); 
    		ad.setPositiveButton("Close", null);

    		// Check Username
    		if(txtUsername.getText().length() == 0)
    		{
                ad.setMessage("Please input [Username] ");
                ad.show();
                txtUsername.requestFocus();
                return false;
    		}
    		// Check Password
    		if(txtPassword.getText().length() == 0 || txtConPassword.getText().length() == 0 )
    		{
                ad.setMessage("Please input [Password/Confirm Password] ");
                ad.show();
                txtPassword.requestFocus();
                return false;
    		}
    		// Check Password and Confirm Password (Match)
    		if(!txtPassword.getText().toString().equals(txtConPassword.getText().toString()))
    		{
                ad.setMessage("Password and Confirm Password Not Match! ");
                ad.show();
                txtConPassword.requestFocus();
                return false;
    		}
    		// Check Name
    		if(txtName.getText().length() == 0)
    		{
                ad.setMessage("Please input [Name] ");
                ad.show();
                txtName.requestFocus();
                return false;
    		}
    		// Check Email
    		if(txtEmail.getText().length() == 0)
    		{
                ad.setMessage("Please input [Email] ");
                ad.show();
                txtEmail.requestFocus();
                return false;
    		}
      		// Check Tel
    		if(txtTel.getText().length() == 0)
    		{
                ad.setMessage("Please input [Tel] ");
                ad.show();
                txtTel.requestFocus();
                return false;
    		}
    		

     		String url = "https://www.thaicreate.com/android/saveADDData.php";
     		
    		List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("sUsername", txtUsername.getText().toString()));
            params.add(new BasicNameValuePair("sPassword", txtPassword.getText().toString()));
            params.add(new BasicNameValuePair("sName", txtName.getText().toString()));
            params.add(new BasicNameValuePair("sEmail", txtEmail.getText().toString()));
            params.add(new BasicNameValuePair("sTel", txtTel.getText().toString()));
            
            /** Get result from Server (Return the JSON Code)
             * StatusID = ? [0=Failed,1=Complete]
             * Error	= ?	[On case error return custom error message]
             * 
             * Eg Save Failed = {"StatusID":"0","Error":"Email Exists!"}
             * Eg Save Complete = {"StatusID":"1","Error":""}
             */
            
        	 String resultServer  = getHttpPost(url,params);
            
            /*** Default Value ***/
        	String strStatusID = "0";
        	String strError = "Unknow Status!";
        	
        	JSONObject c;
			try {
				c = new JSONObject(resultServer);
            	strStatusID = c.getString("StatusID");
            	strError = c.getString("Error");
			} catch (JSONException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			
			// Prepare Save Data
			if(strStatusID.equals("0"))
			{
                ad.setMessage(strError);
                ad.show();
			}
			else
			{
				Toast.makeText(MainActivity.this, "Save Data Successfully", Toast.LENGTH_SHORT).show();
				txtUsername.setText("");
				txtPassword.setText("");
				txtConPassword.setText("");
				txtName.setText("");
				txtEmail.setText("");
				txtTel.setText("");
			}
       	            
    
    	return true;
    }
    

	public String getHttpPost(String url,List<NameValuePair> params) {
		StringBuilder str = new StringBuilder();
		HttpClient client = new DefaultHttpClient();
		HttpPost httpPost = new HttpPost(url);
		
		try {
			httpPost.setEntity(new UrlEncodedFormEntity(params));
			HttpResponse response = client.execute(httpPost);
			StatusLine statusLine = response.getStatusLine();
			int statusCode = statusLine.getStatusCode();
			if (statusCode == 200) { // Status OK
				HttpEntity entity = response.getEntity();
				InputStream content = entity.getContent();
				BufferedReader reader = new BufferedReader(new InputStreamReader(content));
				String line;
				while ((line = reader.readLine()) != null) {
					str.append(line);
				}
			} else {
				Log.e("Log", "Failed to download result..");
			}
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return str.toString();
	}
	
	
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
    
}