public class WidgetParams {
	private List<ParamHash> paramsList = new ArrayList<ParamHash>();
		
	private abstract class ParamGetter	{
		String key;		
		ParamGetter(String key)	{
			this.key = key;
		}		
		abstract Object get();	
	}

	private class ParamHash	{
		String key;
		int index;
		ParamHash(String key, int index)	{
			this.key = key;
			this.index = index;
		}
	}
	
	private final ParamGetter[] paramsGetter = {
			new ParamGetter("BALANCE")	{
				@Override Object get() {
					return ...
				}
			},
			new ParamGetter("LAST_UPDATE")	{
				@Override Object get() {
					return ...
				}
			},
			...
			}
	};
	
	private boolean isExist(String param)	{
		for (ParamHash p: paramsList)
			if (p.key.equals(param))	{
				return	true;
			}
		return	false;
	}
	
	void add(String params[])	{
		for (String p: params)
			if (!isExist(p))	{
				for(int i=0; i<paramsGetter.length; i++)
					if (paramsGetter[i].key.equals(p))	{
						paramsList.add(new ParamHash(p, i));
						break;
					}
			}			
	}
		
	Bundle get()	{
		Bundle bundle = new Bundle();
		for (ParamHash p: paramsList) {
			int index = p.index;
			Object data = paramsGetter[index].get();
			if (data.getClass()==Double.class)
				bundle.putDouble(p.key, (Double)data);
			else if (data.getClass()==Long.class)
				bundle.putLong(p.key, (Long)data);
			else if (data.getClass()==Boolean.class)
				bundle.putBoolean(p.key, (Boolean)data);
			else if (data.getClass()==String.class)
				bundle.putString(p.key, (String)data);
		}
		return	bundle;
	}

}

@Overridevoid 
saveMyObjectToBundle(Object obj, Bundle b) {
	bundle.putString( key, (String) obj);
}

String s = bundle.getString("PARAM1");
remoteView.setTextViewText(getString(R.id.info), s);

	Date date;
	long updated = bundle.getLong("LAST_UPDATE", 0);
	if (updated!=0)
		date = new Date(updated);
	else
		date = new Date();

	private abstract class ParamGetter	{
		String key;		
		ParamGetter(String key)	{
			this.key = key;
		}		
		abstract Object get();	
		abstract void saveObject2Bundle(Object obj, Bundle bundle);
	}

	private abstract class DoubleParamGetter extends ParamGetter...
	private abstract class LongParamGetter extends ParamGetter...
	private abstract class BooleanParamGetter extends ParamGetter...
	private abstract class StringParamGetter extends ParamGetter...

	private final ParamGetter[] paramsGetter = {
			new DoubleParamGetter("BALANCE")	{
				@Override Object get() {
					...
					return (Double)value;
				}
			},
			...
	};

	Bundle get()	{
		Bundle bundle = new Bundle();
		for (ParamHash p: paramsList) {
			int index = p.index;
			Object data = paramsGetter[index].get();
			paramsGetter[index].saveObject2Bundle(data, bundle);
		}
		return	bundle;
	}