urlconnectionを使ったGETリクエスト結果を適当に表示する雑なサンプル

package hoge.android;

import java.io.*;
import java.net.*;

import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import java.util.logging.Level;
import java.util.logging.Logger;


public class MainActivity extends Activity
{
    
    public TextView textView;
    public EditText edtInch;
    public Button btn;
    public TextView txtResult;
    public String data;
    
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        LinearLayout layout = new LinearLayout(this);
        layout.setOrientation(LinearLayout.VERTICAL);
        setContentView(layout);
        
        textView = new TextView(this);
        
        try {
            URL url = new URL("http", "suzuki.toshinari.jp", "");
            HttpURLConnection urlcon;
            try {
                urlcon = (HttpURLConnection)url.openConnection();
                urlcon.setRequestMethod("GET");

                urlcon.connect();

                BufferedReader reader = new BufferedReader(new InputStreamReader(urlcon.getInputStream()));
                while (true){
                    String line = reader.readLine();
                    if ( line == null ){
                        break;
                    }
                    data += line;
                }
                textView.setText(data);
                layout.addView(textView);
                reader.close();

                urlcon.disconnect();
            } catch (IOException ex) {
                Logger.getLogger(MainActivity.class.getName()).log(Level.SEVERE, null, ex);
            }

        } catch (MalformedURLException ex) {
            Logger.getLogger(MainActivity.class.getName()).log(Level.SEVERE, null, ex);
        }
        
    }
}

mainスレッドで実行できたけどいいのだろうか。UIを担当するmainスレッドでネットワークの処理を書くと待機時間が長くなりアプリが応答しなくなってしまうらしい。