すみません
ソースです

public class MainActivity extends Activity {

　　ListView listView;
　　
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
　　　listView = new ListView(this);
　　　listView = (ListView)findViewById(R.id.listView);
　　　ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1);

　try{ URL u = new URL("http://tsushima.2ch.net/newsplus/subject.txt";);
　　HttpURLConnection http = (HttpURLConnection)u.openConnection();
　　 http.setRequestMethod("GET");
　　http.connect();
　　 BufferedReader br = new BufferedReader(new InputStreamReader(http.getInputStream()));

String line;
while((line = br.readLine()) != null){
　　adapter.add(line);
}
}catch (Exception e) {
e.printStackTrace();
}
listView.setAdapter(adapter);
}
}