Android Open Source - Tabatoo-BuzzTouch-demo-android B T_image Loader

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License

The source code is released under:

Copyright, David Book, buzztouch.com All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are...

Java Source Code

/*  File Version: 3.0
 *  Copyright, David Book, buzztouch.com
 */*  w  ww.  j  a  v a2s .  c o  m*/
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without modification, are 
 *  permitted provided that the following conditions are met:
 *
 *  Redistributions of source code must retain the above copyright notice which includes the
 *  name(s) of the copyright holders. It must also retain this list of conditions and the 
 *  following disclaimer. 
 *
 *  Redistributions in binary form must reproduce the above copyright notice, this list 
 *  of conditions and the following disclaimer in the documentation and/or other materials 
 *  provided with the distribution. 
 *
 *  Neither the name of David Book, or buzztouch.com nor the names of its contributors 
 *  may be used to endorse or promote products derived from this software without specific 
 *  prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
 *  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
 *  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
 *  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
 *  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
 *  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
 *  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
 *  OF SUCH DAMAGE. 
 */
package com.tabatoodemo;
import java.io.IOException;
import java.util.HashMap;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.view.View;
import android.widget.ImageView;

public class BT_imageLoader {
  private final static String objectName = "BT_imageLoader";
  private static HashMap<String, Bitmap> cache = new HashMap<String, Bitmap>();
  
  //loadImage called from activity context...
  public static void loadImage(final Activity activity, final BT_item listItem, final ImageView imageView, final String url) {
    
    synchronized (cache) {
      if (cache.containsKey(url)) {
        imageView.setVisibility(View.VISIBLE);
        
        Drawable d = new BitmapDrawable(cache.get(url));
        imageView.setImageDrawable(d);
        
        
        //imageView.setImageBitmap(cache.get(url));
        //BT_debugger.showIt(objectName + " loading image from the cache...");
        return;
      }
    }
    
    (new Thread() {
      public void run() {
        final Bitmap bitmap;
        
        try {
          bitmap = loadImage(url, listItem);
        } catch (ClientProtocolException e) {
          return;
        } catch (IOException e) {
          return;
        }
        
        activity.runOnUiThread(new Runnable() {
          public void run() {
            //BT_debugger.showIt(objectName + " setting image on UI thread...");
            imageView.setVisibility(View.VISIBLE);
            imageView.setImageBitmap(bitmap);
          }
        });
        
        synchronized (cache) {
          cache.put(url, bitmap);
        }
      }
    }).start();
  }
  
  private static Bitmap loadImage(String url, BT_item listItem) throws ClientProtocolException, IOException {
    DefaultHttpClient client = new DefaultHttpClient();
    HttpResponse response = client.execute(new HttpGet(url));
    Bitmap image = BitmapFactory.decodeStream(response.getEntity().getContent());
    //BT_debugger.showIt(objectName + " loading image from " + url + "...");
    if (image == null) {
      BT_debugger.showIt(objectName + " downloaded image is null?");
      throw new IOException("Empty image.");
    }else{
      int listIconCornerRadius = Integer.parseInt(BT_strings.getStyleValueForScreen(listItem, "listIconCornerRadius", "0"));
      if(listIconCornerRadius < 1){
        return image;
      }else{
        return BT_viewUtilities.getRoundedImage(image, listIconCornerRadius);
      }
      
    }
    
  }
}

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