Timeline with View holder

TImelineWithViewholder.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 mealPremealKey;
        TextView mealPostMeal;
        TextView mealPostMealKey;
        TextView mealMood;
        TextView mealMoodKey;
    }
	
	@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) {

        View returnView = null;

        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:

                MealViewHolder mealViewHolder;

                GetOnlyMeal m = (GetOnlyMeal) timelineList.get(position);

                if(convertView == null){
                    convertView = mInflater.inflate(R.layout.partial_timeline_meal, null);

                    mealViewHolder = new MealViewHolder();
                    mealViewHolder.mealTime = (TextView) convertView.findViewById(R.id.timeline_meal_time);
                    mealViewHolder.mealImage = (ImageView) convertView.findViewById(R.id.timeline_meal_image);
                    mealViewHolder.mealPortion = (TextView) convertView.findViewById(R.id.timeline_meal_portion);
                    mealViewHolder.mealDescription = (TextView) convertView.findViewById(R.id.timeline_meal_description);
                    mealViewHolder.mealPremeal = (TextView) convertView.findViewById(R.id.timeline_meal_premeal);
                    mealViewHolder.mealMood = (TextView) convertView.findViewById(R.id.timeline_meal_mood);
                    mealViewHolder.mealPostMeal = (TextView) convertView.findViewById(R.id.timeline_meal_postmeal);
                    mealViewHolder.mealPremealKey = (TextView) convertView.findViewById(R.id.timeline_meal_postmeal_key);
                    mealViewHolder.mealMoodKey = (TextView) convertView.findViewById(R.id.timeline_meal_postmeal_key);
                    mealViewHolder.mealPostMealKey = (TextView) convertView.findViewById(R.id.timeline_meal_postmeal_key);

                    convertView.setTag(mealViewHolder);
                } else {
                    mealViewHolder = (MealViewHolder) convertView.getTag();
                }

                ImageLoader.getInstance().displayImage(
                    m.getPhoto().getUrl(),
                    mealViewHolder.mealImage,
                    new DisplayImageOptions.Builder()
                            .showImageForEmptyUri(R.drawable.no_photo)
                            .showImageOnFail(R.drawable.no_photo)
                            .imageScaleType(ImageScaleType.IN_SAMPLE_POWER_OF_2)
                            .cacheOnDisc(true)
                            .build(),
                    new SimpleImageLoadingListener(){
                        @Override
                        public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
                            super.onLoadingComplete(imageUri, view, loadedImage);
//	                        view.startAnimation(AnimationUtils.loadAnimation(TimelineActivity.this, R.anim.fade_in));
                        }
                    }
                );

                mealViewHolder.mealTime.setText(m.getHumanTime());
                mealViewHolder.mealPortion.setText(Integer.toString(m.getPortionConsumed()) + "/4");
                mealViewHolder. mealDescription.setText(m.getDescription());

                // Hide or show optional data

                if(m.getPostMealFullness() != null){
                    mealViewHolder.mealPostMeal.setText(m.getPreMealHunger().getDescription());
                } else {
                    convertView.findViewById(R.id.timeline_meal_postmeal_key).setVisibility(View.GONE);
                    mealViewHolder.mealPostMeal.setVisibility(View.GONE);
                }

                if(m.getPreMealHunger() != null){
                    mealViewHolder.mealPremeal.setText(m.getPostMealFullness().getDescription());
                } else {
                    mealViewHolder.mealPremealKey.setVisibility(View.GONE);
                    mealViewHolder.mealPremeal.setVisibility(View.GONE);
                }

                if(m.getMood() != null){
                    mealViewHolder.mealMood.setText(m.getMood().getDescription());
                } else {
                    mealViewHolder.mealMoodKey.setVisibility(View.GONE);
                    mealViewHolder.mealMood.setVisibility(View.GONE);
                }
                returnView = convertView;
                break;
            case TYPE_ACTIVITY:
                break;
            case TYPE_DAILY_INPUT:
                break;
            case TYPE_DRINK:
                break;
            case TYPE_MESSAGE:
                break;
            default:
                break;
        }
        return returnView;
	}