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POAndroid gridview : error while displaying large number of images
 

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  1. POAndroid gridview : error while displaying large number of images
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    <p>I have a grid view which is populated using a custom ImageAdapter class extending BaseAdapter. The images are dynamically loaded from a particular folder in the SD card. I have named the images according to their postition (1.png, 2.png etc.). I have also set an <code>OnClickListener</code> for the grid items: an audio file with the same name as the image is played from the SD card. </p> <p>It works well when the number of images is less and fits on a screen.</p> <p>But when the number is large and the images doesn't fit on a screen, the next set of rows displayed by scrolling the screen downwards is mostly repetition of images from the first few rows rather than the images at the corresponding position.</p> <p>I find from the logcat that the <code>getView()</code> function of the adapter class gets called initially only for the images which are visible on the screen and while scrolling downwards, its not being called properly for further positions</p> <p>Also sometimes the entire set of images gets re-arranged. Should I do anything different from the basic implementation of grid view for properly displaying large number of images? Is there anything else I must be taking care of?</p> <p>EDIT - CODE</p> <p>I'm setting each tab using</p> <pre><code>tabGrid[i].setAdapter(new ImageAdapter(this,i)); </code></pre> <p>This is the image adapter class</p> <pre><code>@Override public int getCount() { // fileNames is a string array containing the image file names : 1.png, 2.png etc return fileNames.length; } @Override public Object getItem(int position) { return null; } @Override public long getItemId(int position) { // I did not use this function return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub View v; if(convertView==null) { LayoutInflater inflater = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); v = inflater.inflate(R.layout.grid_image, null); ImageView iv = (ImageView)v.findViewById(R.id.icon_image); String bitmapFileName = fileNames[position]; Bitmap bmp =(Bitmap)BitmapFactory.decodeFile(dir.getPath() + "/" + bitmapFileName);a iv.setImageBitmap(bmp); } else { v = convertView; } return v; } </code></pre> <p>Does the <code>getItem()</code> and <code>getItemId()</code> functions matter? The directories and file names are all valid.</p>
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    1. USJerrin George
    1. USJerrin George
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      1. POAndroid gridview : error while displaying large number of images
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      1. VTUpMod
    2. VO
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    1. COAny chance you could post some code to see what could be going wrong ? :)
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      1. POAndroid gridview : error while displaying large number of images
      1. USGregory
    2. CO@Gregory : thanks for looking into it..i have added the code.. dint add the initially code because the qn became too lengthy
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      1. POAndroid gridview : error while displaying large number of images
      1. USJerrin George
 

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