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    <p>Please use AsyncTask. AsyncTask enables proper and easy use of the UI thread. This class allows to perform background operations and publish results on the UI thread without having to manipulate threads and/or handlers.</p> <p>AsyncTask is designed to be a helper class around Thread and Handler and does not constitute a generic threading framework. AsyncTasks should ideally be used for short operations (a few seconds at the most.)</p> <p>you can just use an anonymous class for the async task. This would like this:</p> <pre><code>ImageView mChart = (ImageView) findViewById(R.id.imageview); String URL = "http://www...anything ..."; mChart.setTag(URL); new DownloadImageTask.execute(mChart); </code></pre> <p>The Task class:</p> <pre><code>public class DownloadImagesTask extends AsyncTask&lt;ImageView, Void, Bitmap&gt; { ImageView imageView = null; @Override protected Bitmap doInBackground(ImageView... imageViews) { this.imageView = imageViews[0]; return download_Image((String)imageView.getTag()); } @Override protected void onPostExecute(Bitmap result) { imageView.setImageBitmap(result); } private Bitmap download_Image(String url) { ... } </code></pre> <p>Here, <strong>onPostExecute</strong>, you can easily check whether the process of download image is completed or not.</p> <p><strong>Further reading</strong> </p> <ul> <li><a href="http://developer.android.com/reference/android/os/AsyncTask.html" rel="nofollow noreferrer">http://developer.android.com/reference/android/os/AsyncTask.html</a></li> <li><a href="https://stackoverflow.com/questions/8224993/loading-image-using-asynctask">Loading Image using AsyncTask</a></li> <li><a href="https://stackoverflow.com/questions/3090650/android-loading-an-image-from-the-web-with-asynctask">Android : Loading an image from the Web with Asynctask</a></li> <li><a href="https://stackoverflow.com/questions/7177847/android-help-with-adding-a-progress-dialog-while-image-loading">Android Help with adding a progress dialog while image loading?</a></li> </ul> <p><strong>EDIT:</strong></p> <ul> <li>If you are trying to download larger files, you might consider putting your application into some type of <a href="http://developer.android.com/reference/android/app/Service.html" rel="nofollow noreferrer">Service</a> as this would potentially take a few hours.</li> <li>You can consider using <a href="http://developer.android.com/reference/android/app/DownloadManager.html" rel="nofollow noreferrer">Download Manger</a> for newer devices (with Android 2.3+)</li> <li>Also a nice resource -> <a href="https://stackoverflow.com/questions/3028306/download-a-file-with-android-and-showing-the-progress-in-a-progressdialog">Download a file with Android, and showing the progress in a ProgressDialog</a></li> </ul>
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    1. POHow to check whether the process of download image is completed or not?
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    1. USMd Mahbubur Rahman
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    1. COThank you for your information. I will try and look into AsyncTask. As you mentioned _AsyncTasks should ideally be used for short operations (a few seconds at the most.)_. For now I wanted to download image so I guess it should be no problem with that. But if later on I want to implement download video feature from the url as well. Is AsyncTask suitable for that task?
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      1. USIssacZH.
    2. CO@IssacZH. Most Welcome as it helped you. :) I have edited my answer as your comment. Please have a look at EDIT portion.
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    3. COThank you again! Now I know the idea how to progress on this. Your answer is very helpful.
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