Timeline.java

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

    @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;
    }