Hi All,
I have a ListView with dynamic content from web. It has images of size
480X480 px in each row. These images are downloaded in a separate
thread and stored to SD card and read from there to display in
ListView. The images from SD card are also read using a different
thread. The problem is the ListView scroll is very laggy. What should
we do to fix this problem?
This is the code that I have written in getView
final ViewHolder holder;
try{
if (convertView == null) {
final LayoutInflater inflator = (LayoutInflater)
context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflator.inflate(R.layout.my_row, null);
// initilize the UI
convertView.setTag(holder);
} else {
holder = (MyViewHolder) convertView.getTag();
}
holder.imageView.setTag(position);
holder.imageView.setImageDrawable(holder.drawable);
new Thread(new Runnable() {
@Override
public void run() {
//fetch bitmap from sdcard and set to the imageview
// calling the handler to update the imageView
(holder.imageView.setImageBitmap(bitmap);)
}
}finally{
bitmap = null;
}
}
}).start;
return convertView;
}
finally{
//bitmap = null;
}
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