MessageCardScrollAdapter.java

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package com.riverlab.robotmanager.messages;

import java.util.List;

import android.bluetooth.BluetoothDevice;
import android.content.Context;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.google.android.glass.widget.CardScrollAdapter;
import com.riverlab.robotmanager.R;

public class MessageCardScrollAdapter extends CardScrollAdapter
{
        private List<RobotMessage> mMessages;
        private Context context;
        ViewHolder holder;
        
        public MessageCardScrollAdapter(Context context, List<RobotMessage> messages) 
        {
        mMessages = messages;
        this.context = context;
    }
        
        public void addMessage(RobotMessage msg) {
        mMessages.add(msg);
    }

        @Override
        public int getCount() {
                return mMessages.size();
        }

        @Override
        public RobotMessage getItem(int index) 
        {
                return mMessages.get(index);
        }

        @Override
        public int getPosition(Object msg)
        {
                return mMessages.indexOf((RobotMessage)msg);
        }
        
         class ViewHolder {
                TextView headline;
                TextView text;
                ImageView img;
                TextView timestamp;
                TextView nextTxt;
                TextView prevTxt;
                TextView msgCounter;
                ImageView indicator;
            }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
        if (convertView == null) {
            convertView = View.inflate(context, R.layout.message_card, null);
            holder = new ViewHolder();
            Log.d("MessageActivity", "Getting views");
            holder.headline = (TextView) convertView.findViewById(R.id.headline);
            holder.text = (TextView) convertView.findViewById(R.id.messageText);
            holder.img = (ImageView) convertView.findViewById(R.id.imageView);
            holder.timestamp = (TextView) convertView.findViewById(R.id.timestampText);
            holder.nextTxt = (TextView) convertView.findViewById(R.id.msgNextText);
            holder.prevTxt = (TextView) convertView.findViewById(R.id.msgPreviousText);
            holder.msgCounter = (TextView) convertView.findViewById(R.id.msgCounterText);
            holder.indicator = (ImageView) convertView.findViewById(R.id.imageIndicator);
            
            convertView.setTag(holder);
        }
        else {
            holder = (ViewHolder) convertView.getTag();
        }

        RobotMessage msg = getItem(position);
        holder.headline.setText(msg.getSender() + ": ");
        holder.text.setText(msg.getText());
  
        if (msg.getType().equals("Image") && msg.getImage() != null)
        {
                holder.img.setImageBitmap(msg.getImage());
                holder.indicator.setVisibility(View.VISIBLE);
        }
        holder.timestamp.setText(msg.getTimestamp());
        
        
        if (hasNext(position))
        {
                holder.nextTxt.setVisibility(View.VISIBLE);
                holder.nextTxt.setText(R.string.next);
        }
        else
        {
                holder.nextTxt.setVisibility(View.INVISIBLE);
                //holder.nextTxt.setText(R.string.no_next);
        }
        
        if (hasPrevious(position))
        {
                holder.prevTxt.setVisibility(View.VISIBLE);
                holder.prevTxt.setText(R.string.previous);
        }
        else
        {
                holder.prevTxt.setVisibility(View.INVISIBLE);
                //holder.prevTxt.setText(R.string.no_previous);
        }
        
        holder.msgCounter.setText((position + 1) + " of " + mMessages.size());

        return convertView;
        }
        
        private boolean hasNext(int position)
        {
                int last = mMessages.size();
                int next = position + 1;

                return next < last;
        }
        
        private boolean hasPrevious(int position)
        {
                return position > 0;
        }
        
        public ViewHolder getHolder()
        {
                return holder;
        }

}