public void onClickDelButton(View view) {
   Log.i(Tag, "onClickDelButton");
   try {
     ListView listView_players = (ListView) findViewById(R.id.player_listView_players);
     for (int i = GameData.getAllPlayers().size() - 1; i >= 0; i--) {
       if (listView_players.isItemChecked(i)) {
         GameData.removePlayer(GameData.getAllPlayers().get(i));
       }
     }
     // リストビュー更新
     ListView_update();
   } catch (Exception e) {
     Log.e(Tag, e.getMessage());
     ErrorReportClass.LogException(this, e);
   }
 }