Question

I override SimpleAdapter:

class NoticelistAdapter extends SimpleAdapter
 {
    public NoticelistAdapter(Context context,
            List<? extends Map<String, ?>> data, int resource,
            String[] from, int[] to)
    {
        super(context, data, resource, from, to);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent)
    {
        Map<String,Object> map= list.get(position);
        int readState =  (Integer) map.get("ReadState");
        if (readState == 1)
        {
            // do something to change the color of title
        }
        return convertView;
    }
 }

And the adapter is:

adapter = new NoticelistAdapter(NoticelistActivity.this, list, R.layout.row_noticelist,
                                    new String[] { "Title", "RealName","Date"}, 
                                    new int[] { R.id.noticetitle, R.id.noticerealname,R.id.noticedate});

There is an int parameter in each map called “readstate”, if the readstate == 1, then I want change the color of “Title” (TextView) to another color.
I know I should override getView(…) in my adapter, but I dont know how to do this. Will you please help me. Thank you in advance.

Answer 1

Override the Adapter’s getItemViewType() to return two different layout flags, and override getViewTypeCount() to return the number of views. Then depending on flag, set the row layout in getView():

 private static final int TYPE_READ = 0;
 private static final int TYPE_NON_READ = 1;
 private static final int TYPE_MAX_COUNT = TYPE_NON_READ + 1;
 //...

    @Override
    public int getItemViewType(int position) {
         int readState =  (Integer) mMap.get("ReadState");
        if(readState==1){
           return TYPE_READ;
        }else{
           return TYPE_NON_READ;
        }

    @Override
    public int getViewTypeCount() {
        return TYPE_MAX_COUNT;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        int type = getItemViewType(position);

        if (convertView == null) {
            holder = new ViewHolder();
            switch (type) {
                case TYPE_READ:
                    convertView = mInflater.inflate(R.layout.item_one, null);
                    //set read layout
                    break;
                case TYPE_NON_READ:
                    convertView = mInflater.inflate(R.layout.item_two, null);
                    // set non-read layout
                    break;
            }
    //etc

Here is a complete tutorial.