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POPassing ArrayList<Bitmap> into another class and convert to Bitmap[]
 

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  1. POPassing ArrayList<Bitmap> into another class and convert to Bitmap[]
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    <p>I fetch the image URL from my PHP and MySQL database. Everything here is fine, because the <code>Log.d</code> shows the result with a valid image URL.</p> <pre><code>if (success == 1) { JSONArray comments = json.getJSONArray("photos"); for (int i = 0; i &lt; comments.length(); i++) { JSONObject m = comments.getJSONObject(i); final String filename = m.getString("filename"); final String extension = m.getString("extension"); String upload_at = m.getString("upload_at"); String uid = m.getString("uid"); runOnUiThread(new Runnable() { @Override public void run() { Bitmap mThumbIds = fetchImage(filepath_min + filename + "." + extension); Log.d("Photo URL", filepath_min + filename + "." + extension); List&lt;Bitmap&gt; l = Arrays.asList(mThumbIds); photoList = new ArrayList&lt;Bitmap&gt;(l); } }); } } // Instance of ImageAdapter Class mHandler.postDelayed((new Runnable() { public void run() { imgGrid.setAdapter(new ImageAdapter( PhotoViewerActivity.this, photoList)); } }), 1000); </code></pre> <p><br></p> <p>Below this for fetch an image from the given URL and return as Bitmap. Nothing problem here, just for reference want to show that the return is Bitmap.</p> <pre><code>public Bitmap fetchImage(String urlstr) { try { URL url; url = new URL(urlstr); HttpURLConnection c = (HttpURLConnection) url.openConnection(); c.setDoInput(true); c.connect(); InputStream is = c.getInputStream(); Bitmap img; img = BitmapFactory.decodeStream(is); return img; } catch (MalformedURLException e) { Log.d("RemoteImageHandler", "fetchImage passed invalid URL: " + urlstr); } catch (IOException e) { Log.d("RemoteImageHandler", "fetchImage IO exception: " + e); } return null; } </code></pre> <p><br></p> <p>This is my ImageAdapter for viewing image in GridView.</p> <pre><code>public class ImageAdapter extends BaseAdapter { private Context mContext; List&lt;Bitmap&gt; list = new ArrayList&lt;Bitmap&gt; l; public ImageAdapter(Context c, ArrayList&lt;Bitmap&gt; l) { mContext = c; list = l; } public Bitmap[] mThumbIds = list.toArray(new Bitmap[list.size()]); @Override public int getCount() { return mThumbIds.length; } @Override public Object getItem(int position) { return mThumbIds[position]; } @Override public long getItemId(int position) { return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { ImageView imageView = new ImageView(mContext); imageView.setImageBitmap(mThumbIds[position]); imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); imageView.setLayoutParams(new GridView.LayoutParams(130, 130)); return imageView; } } </code></pre> <p><br></p> <p>Here is my problem. None image shown on the activity. When I try hardcoded URL with fetch array in Bitmap[] mThumbIds, its was success.</p> <pre><code>Bitmap[] mThumbIds = { fetchImage("http://...jpg"), fetchImage("http://...jpg") } </code></pre> <p>I don't know what's wrong. I've tried <code>Bitmap[] mThumbIds = list.toArray(new Bitmap[list.size()]);</code> to convert ArrayList to Array. <br></p>
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    1. USFaizal
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      1. VTUpMod
    1. COyou have a good reasons to send `Array` of `Bitmap`? why not just send the array of URL's and do loading of images in the adapter(Lazy Loading). As bitmap of `Array` is a lot on memory.
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      1. USMohsin Naeem
    2. COSo, you mean to send array of String URL's and fetch the image inside ImageAdapter class? OK, I give it try.
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      1. USFaizal
 

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