ListView (activity feed) with 20 different types of rows, each having 20 different views

A week ago I asked a question on stackoverflow about having a listview with different kinds of items in it.

I know how to populate a list with custom items via custom adapter. But how do I populate it with a few different types of items?

At the time I didnt know that it would have made a difference so I mentioned I only have 4 types of list items not to complicate things. I got some responses with extremely simple cases explained (2 types of items with a single view inside each one). I dont think I can implement those approaches explained in the examples I got, I need a more object oriented approach.

I would like to have a separate class that takes an XML layout and deals with its views and its buttons.

Something like this:

public class MyProfileCommentAdapter extends BaseAdapter { private ArrayList itemNames = new ArrayList(); private ArrayList itemRatings = new ArrayList(); private ArrayList itemComments = new ArrayList(); private ArrayList itemCommentDates = new ArrayList(); private ArrayList itemIds = new ArrayList(); private Context context; private LayoutInflater layoutInflater; private ImageButton iMyCommentsCommentedProductImage; private TextView tvMyCommentsCommentedItemName; private TextView tvMyCommentsCommentedItemDate; private TextView tvMyCommentsCommentedItemContent; private TextView tvMyCommentsCommentedItemRating; private Button bMyCommentsEditComment; private Button bMyCommentsDeleteComment; public MyProfileCommentAdapter(Context context, ArrayList itemNames, ArrayList itemRatings, ArrayList itemComments, ArrayList itemCommentDates, ArrayList itemIds){ this.context = context; this.itemNames = itemNames; this.itemComments = itemComments; this.itemCommentDates = itemCommentDates; this.itemRatings = itemRatings; this.itemIds = itemIds; layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); } @Override public int getCount() { return itemIds.size(); } @Override public Object getItem(int arg0) { return itemIds.get(arg0) ; } @Override public long getItemId(int position) { return itemIds.get(position); } @Override public View getView(int position, View convertView, ViewGroup parent) { if(convertView==null) { convertView = layoutInflater.inflate(R.layout.item_adapterable_my_profile_comment, parent, false); } iMyCommentsCommentedProductImage = (ImageButton) convertView.findViewById(R.id.iMyCommentsCommentedProductImage); tvMyCommentsCommentedItemName = (TextView) convertView.findViewById(R.id.tvMyCommentsCommentedItemName); tvMyCommentsCommentedItemDate = (TextView) convertView.findViewById(R.id.tvMyCommentsCommentedItemDate); tvMyCommentsCommentedItemContent = (TextView) convertView.findViewById(R.id.tvMyCommentsCommentedItemContent); tvMyCommentsCommentedItemRating = (TextView) convertView.findViewById(R.id.tvMyCommentsCommentedItemRating); bMyCommentsEditComment = (Button) convertView.findViewById(R.id.bMyCommentsEditComment); bMyCommentsDeleteComment = (Button) convertView.findViewById(R.id.bMyCommentsDeleteComment); tvMyCommentsCommentedItemName.setText(itemNames.get(position)); tvMyCommentsCommentedItemDate.setText(itemCommentDates.get(position)); tvMyCommentsCommentedItemRating.setText(String.valueOf(itemRatings.get(position))); tvMyCommentsCommentedItemContent.setText(itemComments.get(position)); return convertView; }}

I need to have about 20 of these and put them all in a list view (the activity feed of my app), depending on what activities have recently occurred in my app. Each different activity has a separate XML defined with as much view elements in it, as this one, all doing and displaying different stuff.

Now, If I was to use the suggested approach,

@Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null; int type = getItemViewType(position); Log.v(LOG_TAG, "getView " + position + " " + convertView + " type = " + type); if (convertView == null) { holder = new ViewHolder(); switch (type) { case TYPE_ITEM: convertView = mInflater.inflate(R.layout.item, null); holder.textView = (TextView)convertView.findViewById(R.id.text); break; case TYPE_SEPARATOR: convertView = mInflater.inflate(R.layout.separator, null); holder.textView = (TextView)convertView.findViewById(R.id.textSeparator); break; default: break; } convertView.setTag(holder); } else { holder = (ViewHolder)convertView.getTag(); } holder.textView.setText(mData.get(position)); return convertView; }

Looks simple, doesnt it? But in my case, I should have 20 different cases in the SWITCH and each one should have 20-30 rows of code in it. I dont want to implement it this way. Sadly, I have no clue of what to do...

View the original article here

Go back to Main Activity on menu item click

My main activity is continuously receiving data from client. It has three menu items on top right corner which are About , Settings and Home . These three menu tabs are visible in all the three screens i.e. Home Screen(MainActivity class), About page and Settings page. On click of Home menu item , I have written following code

case R.id.menu_Home: Intent intent = new Intent(this, MainActivity.class); startActivity(intent);

My question is if I click Home menu item from any screen , am I restarting my activity? If yes then please provide me some guidance on how to go to main activity screen on clicking Home menu item without restarting it, as I can not afford to loose data by restarting the activity again and again .

View the original article here