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PODownloaded image gets resized
 

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  1. PODownloaded image gets resized
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    <p>I am downloading an image from the internet which has the following dimensions: 128px x 128px After the download the image is used as the background of an <code>ImageButton</code> but when the button is displayed, the image is smaller than it was before it was downloaded. For the download i use an <code>AsyncTask</code> ... here is my code:</p> <pre><code>public class ImageDownloaderButton extends AsyncTask&lt;String, Void, Bitmap&gt; { private String url; private final WeakReference&lt;ImageButton&gt; imageButtonReference; public ImageDownloaderButton(ImageButton imageButton) { imageButtonReference = new WeakReference&lt;ImageButton&gt;(imageButton); } @Override protected Bitmap doInBackground(String... params) { url = params[0]; try { if (url.equals("")) { return null; } return BitmapFactory.decodeStream(new URL(url).openStream()); } catch (MalformedURLException e) { e.printStackTrace(); return null; } catch (IOException e) { e.printStackTrace(); return null; } } @Override protected void onPostExecute(Bitmap result) { if (isCancelled()) { result = null; } if (imageButtonReference != null) { ImageButton imageButton = imageButtonReference.get(); if (imageButton != null) { if (result != null) { imageButton.setImageBitmap(result); } else { imageButton.setImageResource(R.drawable.noimageavailable); } } } } @Override protected void onPreExecute() { if (imageButtonReference != null) { ImageButton imageButton = imageButtonReference.get(); if (imageButton != null) { imageButton.setImageResource(R.drawable.noimageavailable); } } } } </code></pre> <p>The codesnippet where the download is startet:</p> <pre><code>ImageButton imageButton = (ImageButton) view.findViewById(R.id.icon_image); ImageDownloaderButton downloader = new ImageDownloaderButton(imageButton); downloader.execute(supp.getPicture()); //the picture is the url imageButton.setOnClickListener(createOnClickListener(supp.getId())); </code></pre> <p>and finally here is the xml file which contains the <code>ImageButton</code>:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/icon_with_text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="vertical" android:gravity="center_horizontal"&gt; &lt;ImageButton android:id="@+id/icon_image" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@android:color/transparent" android:layout_gravity="center" android:onClick="myClickHandler"/&gt; &lt;TextView android:id="@+id/icon_text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:textColorHighlight="#656565"/&gt; &lt;/LinearLayout&gt; </code></pre> <p><strong>Can anyone explain to me why the image is resized?</strong> The image (noavailableimage) that is shown while the AsyncTask is downloading is 128x128px and this one is shown in the correct size.</p> <p>Screenshots:</p> <p> <img src="https://i.imgur.com/mngHD.png" alt="aphotheke"> <img src="https://i.imgur.com/E5IKh.png" alt="baecker"></p> <p>Emulator:</p> <p><img src="https://i.imgur.com/9C5eW.png" alt="mainmenu"> <img src="https://i.imgur.com/lsNsl.png" alt="supplier"></p>
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    1. USDominik Mohr
    1. USDominik Mohr
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    1. COHow do you know its smaller? It appears smaller or you checked the dimensions manually.
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      1. USRonnie
    2. COIt's smaller because the "No image available" is at correct size :D
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      1. USKheldar
    3. COI added some screenshots and the images. As you can see the "no image available" picture is bigger than the "bäcker" image whereas both images have the same dimensions. The only difference is that the "no image available" picture is loaded from the drawable folder and the "bäcker" picture is loaded from the internet. I'm going to check the exact dimensions of both images now.
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      1. USDominik Mohr
 

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