[RESOLVIDO]Erro: android.os.NetworkOnMainThreadException

package br.com.cristaltemper.clientes;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import android.app.Activity;
import android.app.AlertDialog.Builder;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.net.ConnectivityManager;
import android.net.NetworkInfo.State;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class Replicar extends Activity implements Runnable{

	private Cursor c = null;
	private int total = 0;
	private int totalDB = 0;
	private ProgressDialog pg;
	private SQLiteDatabase db;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.replicar);

		Button btnIniciar = (Button) findViewById(R.id.btnIniciar);
		TextView txvTotal = (TextView) findViewById(R.id.txvTotal);
		
		db = openOrCreateDatabase("cristal.db", Context.MODE_PRIVATE, null);
		c= db.rawQuery("SELECT * FROM clientes", null);
		totalDB = c.getCount();
		txvTotal.setText("Total registros: " + String.valueOf(totalDB));
		
		if(totalDB == 0)
			btnIniciar.setEnabled(false);
		//verifica conezão
		ConnectivityManager conn = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
		if(conn.getNetworkInfo(0).getState() == State.CONNECTED)
			btnIniciar.setEnabled(true);
		 else if(conn.getNetworkInfo(1).getState() == State.CONNECTED)
			btnIniciar.setEnabled(true);
		 else {
			btnIniciar.setEnabled(false);
			txvTotal.setText("Você precisa de conexão!");
		}
		
		btnIniciar.setOnClickListener(new View.OnClickListener() {

			@Override
			public void onClick(View v) {
				Builder msg = new Builder(Replicar.this);
				msg.setMessage("Deseja reiniciar a replição?");
				msg.setPositiveButton("Sim", new DialogInterface.OnClickListener() {
					
					@Override
					public void onClick(DialogInterface dialog, int which) {
						pg = ProgressDialog.show(Replicar.this, "Aguarde...", "Replicando dados", true, false, null);
						Thread t = new Thread(Replicar.this);
						t.start();
					}
				});
					
					
				msg.setNegativeButton("Não", null);
				
				msg.show();
			}
		});
	}

	@Override
	public void run() {
		while(c.moveToNext()){
			//URL
			StringBuilder strURL = new StringBuilder();
			strURL.append("http://10.0.10.4/clientes/insert.php?nome=");
			strURL.append(c.getString(c.getColumnIndex("nome")));
			strURL.append("&email=");
			strURL.append(c.getString(c.getColumnIndex("email")));
			
			//tranforma string em url
			try {
				URL obj = new URL(strURL.toString());
				HttpURLConnection con = (HttpURLConnection) obj.openConnection();
		 
				// optional default is GET
				con.setRequestMethod("GET");
		 
				//add request header
				con.setRequestProperty("User-Agent", "Mozilla/5.0");
		 
				int responseCode = con.getResponseCode();
				System.out.println("\nSending 'GET' request to URL : " + strURL.toString());
				System.out.println("Response Code : " + responseCode);
		 
				BufferedReader in = new BufferedReader(
				        new InputStreamReader(con.getInputStream()));
				if(in.readLine().equals("Y")){
					total +=1;
					
					db.execSQL("DELETE FROM clientes WHERE id=" + c.getInt(c.getColumnIndex("id")));
				}	
				in.close();
				/*URL url = new URL(strURL.toString());
				HttpURLConnection http = (HttpURLConnection) url.openConnection();
				InputStreamReader ipr = new InputStreamReader(http.getInputStream());
				BufferedReader bf = new BufferedReader(ipr);
				
				if(bf.readLine().equals("Y")){
					total +=1;
				}*/
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		
		handler.sendEmptyMessage(0);
	}
	
	private Handler handler = new Handler(){
		@Override
		public void handleMessage(Message msg){
			pg.dismiss();
			if(total == totalDB){
				Toast.makeText(getBaseContext(), "Sucesso: total de " + total + "/" + totalDB,Toast.LENGTH_LONG).show();
			}
			finish();
		}
	};
}