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POScale a bitmap and upload to server, ui thread blocking
 

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  1. POScale a bitmap and upload to server, ui thread blocking
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    <p>I'm working on an Android app where I need to upload an image to a server.</p> <p>Before I upload the image, I'm scaling it to a max width/height of 500 with Bitmap.createScaledBitmap()</p> <p>The problem I have is that the UI thread get's stuck even though I do both steps in a background thread.</p> <p>My code looks like this:</p> <pre><code>dialog = ProgressDialog.show(this, "", "Loading...", true); // upload the image to the server Thread t = new Thread() { @Override public void run() { bmp = BitmapHelper.scaleBmp(bmp, 500);//bmp is a private class Bitmap try { HttpResponse response = Helper.uploadBitmap(bmp); BufferedReader reader = new BufferedReader(new InputStreamReader( response.getEntity().getContent(), "UTF-8")); StringBuilder builder = new StringBuilder(); for (String line = null; (line = reader.readLine()) != null;) { builder.append(line).append("\n"); } finalResult = new JSONObject(builder.toString()); } catch (Exception e) { e.printStackTrace(); } handler.post(new Runnable() { @Override public void run() { handleData(); } }); } }; t.run(); </code></pre> <p>Any help on how to do this correctly would be really appreciated!</p> <p>EDIT: adding handleData() function</p> <pre><code>public void handleData() { take.setVisibility(View.VISIBLE); select.setVisibility(View.VISIBLE); process.setVisibility(View.GONE); select_new.setVisibility(View.GONE); message = "An error occured! Please try again."; boolean success = false; try { success = finalResult.getBoolean("success"); url = "http://url"; url += finalResult.getString("path"); thumbnail = finalResult.getString("thumbnail"); } catch (Exception e) { e.printStackTrace(); Log.e(TAG, e.getMessage()); } if (success) { message = "Picture was uploaded successfuly!"; } dialog.dismiss(); Config.toast(this, message); Thread t = new Thread() { @Override public void run() { final Bitmap b = HttpHelper.getBitmapFromURL(thumbnail); preview_image.post(new Runnable() { @Override public void run() { preview_image.setImageBitmap(b); preview_image.setVisibility(View.VISIBLE); preview_image.setOnClickListener(context); } }); } }; t.run(); } </code></pre>
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    1. COWhat does handleData do? Does it do anything on the UI?
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    2. COJust added the function to the post. The thing is that it gets stuck even before the dialog is shown (First code snippet)
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      1. USOlivier
 

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