Timeline.java

public class TimeLineAdapter extends ArrayAdapter {

    private final DailyInput dailyInput;
    private LayoutInflater mInflater;
    List<TimelineObject> timelineList = new ArrayList<TimelineObject>();
  private Context mContext;

    private final int TYPE_MESSAGE = 1;
    private final int TYPE_ACTIVITY = 2;
    private final int TYPE_MEAL = 3;
    private final int TYPE_DAILY_INPUT = 4;
    private final int TYPE_DRINK = 5;

    public static class MealViewHolder{
        TextView mealTime;
        ImageView mealImage;
        TextView mealPortion;
        TextView mealDescription;
        TextView mealPremeal;
        TextView mealPostMeal;
        TextView mealMood;
    }
	
	@SuppressWarnings("unchecked")
	public TimeLineAdapter(Context mContext, int textViewResourceId, List<TimelineObject> timelineList, DailyInput dailyInput) {
		super(mContext, textViewResourceId, timelineList);
		this.timelineList = timelineList;
        this.dailyInput = dailyInput;
		this.mContext = mContext;
        this.mInflater = (LayoutInflater) mContext.getSystemService(mContext.LAYOUT_INFLATER_SERVICE);
	}

    @Override
    public int getItemViewType(int position) {
        int typeId = 0;
        if(timelineList.get(position) instanceof Message){
            typeId = TYPE_MESSAGE;
        }
        if(timelineList.get(position) instanceof PhysicalActivity){
            typeId = TYPE_ACTIVITY;
        }
        if(timelineList.get(position) instanceof GetOnlyMeal){
            typeId = TYPE_MEAL;
        }
        if(timelineList.get(position) instanceof Hydration){
            typeId = TYPE_DRINK;
        }
        return typeId;
    }

    @SuppressLint("ResourceAsColor")
	public View getView(int position, View convertView, ViewGroup parent) {

		if(position == 0){

            if(dailyInput == null){
                RelativeLayout row = (RelativeLayout) View.inflate(mContext, R.layout.partial_timeline_daily_inputs_missing, null);
                return row;
            } else {
                LinearLayout row = createParameters();
                return row;
            }

		}

        switch (getItemViewType(position)){
            case TYPE_MEAL:
                if(convertView == null){
                    convertView = mInflater.inflate(R.layout.partial_timeline_meal, null);

                    MealViewHolder holder = new MealViewHolder();
                    
                }

                break;
            case TYPE_ACTIVITY:
                break;
            case TYPE_DAILY_INPUT:
                break;
            case TYPE_DRINK:
                break;
            case TYPE_MESSAGE:
                break;
            default:
                break;
        }

		TimelineObject to = timelineList.get(position);
		View view = null;
		if(to instanceof GetOnlyMeal ){view = createMeal((GetOnlyMeal) to); };
		if(to instanceof Message ){view = createMessage((Message) to); };
		if(to instanceof PhysicalActivity ){ view = createPhysicalActivity((PhysicalActivity) to); };
		if(to instanceof Hydration ){view = createHydration((Hydration) to); };
		
		return view;
		
	}