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    <p>Use this class instead of the normal imageview</p> <pre><code>package sherif.android.ui; import java.io.IOException; import java.net.MalformedURLException; import sherif.caching.R; import android.content.Context; import android.graphics.drawable.Drawable; import android.os.Handler; import android.os.Message; import android.os.Handler.Callback; import android.util.AttributeSet; import android.view.View; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ProgressBar; /** * * @author Sherif * thanks Blundell * */ public class ImageViewLoading extends LinearLayout{ private static final int COMPLETE = 0; private static final int FAILED = 1; private Context mContext; private Drawable mDrawable; private ProgressBar mSpinner; private ImageView mImage; /** * This is used when creating the view in XML * To have an image load in XML use the tag 'image="http://developer.android.com/images/dialog_buttons.png"' * Replacing the url with your desired image * Once you have instantiated the XML view you can call * setImageDrawable(url) to change the image * @param context * @param attrSet */ public ImageViewLoading(final Context context, final AttributeSet attrSet) { super(context, attrSet); final String url = attrSet.getAttributeValue(null, "image"); if(url != null){ instantiate(context, url); } else { instantiate(context, null); } } /** * This is used when creating the view programatically * Once you have instantiated the view you can call * setImageDrawable(url) to change the image * @param context the Activity context * @param imageUrl the Image URL you wish to load */ //USE THIS TO ADD IMAGEVIEWS public ImageViewLoading(final Context context, final String imageUrl) { super(context); instantiate(context, imageUrl); } /** * First time loading of the LoaderImageView * Sets up the LayoutParams of the view, you can change these to * get the required effects you want */ private void instantiate(final Context context, final String imageUrl) { mContext = context; mImage = new ImageView(mContext); mImage.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); mSpinner = new ProgressBar(mContext); mSpinner.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT)); mSpinner.setIndeterminate(true); //addView(mSpinner); //addView(mImage); if(imageUrl != null){ setImageDrawable(imageUrl); } } /** * Set's the view's drawable, this uses the internet to retrieve the image * don't forget to add the correct permissions to your manifest * @param imageUrl the url of the image you wish to load */ public void setImageDrawable(final String imageUrl) { mDrawable = null; mSpinner.setVisibility(View.VISIBLE); mImage.setVisibility(View.GONE); new Thread(){ public void run() { try { mDrawable = getDrawableFromUrl(imageUrl); imageLoadedHandler.sendEmptyMessage(COMPLETE); } catch (MalformedURLException e) { imageLoadedHandler.sendEmptyMessage(FAILED); } catch (IOException e) { imageLoadedHandler.sendEmptyMessage(FAILED); } }; }.start(); } /** * Callback that is received once the image has been downloaded */ private final Handler imageLoadedHandler = new Handler(new Callback() { public boolean handleMessage(Message msg) { switch (msg.what) { case COMPLETE: mImage.setImageDrawable(mDrawable); mImage.setVisibility(View.VISIBLE); mSpinner.setVisibility(View.GONE); break; case FAILED: default: mImage.setImageResource(R.drawable.failed); mImage.setVisibility(View.VISIBLE); mSpinner.setVisibility(View.GONE); // Could change image here to a 'failed' image // otherwise will just keep on spinning break; } return true; } }); /** * Pass in an image url to get a drawable object * @return a drawable object * @throws IOException * @throws MalformedURLException */ private static Drawable getDrawableFromUrl(final String url) throws IOException, MalformedURLException { return Drawable.createFromStream(((java.io.InputStream)new java.net.URL(url).getContent()), "name"); } } </code></pre>
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