Android Open Source - LiveBlurListView Applications Adapter

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License

The source code is released under:
Apache License
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Java Source Code

package com.koalcat.blurdemo;
/**/* w  w  w  .  j a v a 2 s . com*/
 * @author xuchdeid@gmail.com
 *  __________________________     \_/
   |                          |   /._.\
   |  Android!Android!         > U|   |U
   |                xuchdeid  |   |___|
   |__________________________|    U U
 * */
import java.util.ArrayList;

import android.content.Context;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.graphics.Bitmap;
import android.graphics.drawable.Drawable;
import android.support.v4.util.LruCache;
import android.util.SparseArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AlphabetIndexer;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.SectionIndexer;
import android.widget.TextView;

public class ApplicationsAdapter extends ArrayAdapter<AppInfo> implements SectionIndexer{
  private final LayoutInflater mInflater;
  //private String mSectionString;
  private AlphabetIndexer alphabetIndexer;
  public LruCache<String, Bitmap> mMemoryCache;

  public ApplicationsAdapter(Context context, ArrayList<AppInfo> apps) {
    super(context, 0, apps);
    mInflater = LayoutInflater.from(context);
    //mSectionString = context.getResources().getString(R.string.fast_scroll_alphabet);
    alphabetIndexer = new AlphabetIndexer(new IndexCursor(this), 0, "#ABCDEFGHIJKLMNOPQRSTUVWXYZ");
    final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);  
    final int cacheSize = maxMemory / 8;  
      
    mMemoryCache = new LruCache<String, Bitmap>(cacheSize) {  
      @Override  
      protected int sizeOf(String key, Bitmap bitmap) {  
        return bitmap.getByteCount()/1024;
      }  
    };
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    final AppInfo info = getItem(position);

    if (convertView == null) {
      convertView = mInflater.inflate(R.layout.list_item, parent, false);
    }

    //info.icon = Utilities.createIconThumbnail(info.icon, getContext());

    final TextView textView = ViewHolder.get(convertView, R.id.item_text);
    textView.setText(info.title);
        
    Bitmap bitmap = mMemoryCache.get(info.title_py);
    if (bitmap == null) {
      final PackageManager manager = getContext().getPackageManager();
      Drawable icon = null;
      try {
        icon = manager.getActivityIcon(info.mComponentName);
      } catch (NameNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
      bitmap = Utilities.createIcontoBitmapThumbnail(icon, this.getContext());
      mMemoryCache.put(info.title_py, bitmap);
    }
    
    final ImageView imageView = ViewHolder.get(convertView, R.id.item_image);
    //imageView.setImageDrawable(info.icon);
    imageView.setImageBitmap(bitmap);
//    imageView.setImageResource(R.drawable.ic_launcher);
    return convertView;
  }

  @Override
  public int getPositionForSection(int section) {
    // TODO Auto-generated method stub
    return alphabetIndexer.getPositionForSection(section);
  }

  @Override
  public int getSectionForPosition(int position) {
    // TODO Auto-generated method stub
    return alphabetIndexer.getSectionForPosition(position);
  }

  @Override
  public Object[] getSections() {
    // TODO Auto-generated method stub
    return alphabetIndexer.getSections();
  }
  
  public static class ViewHolder {
    @SuppressWarnings("unchecked")
    public static <T extends View> T get(View view, int id) {
      SparseArray<View> viewHolder = (SparseArray<View>) view.getTag();
      if (viewHolder == null) {
        viewHolder = new SparseArray<View>();
        view.setTag(viewHolder);
      }
      View childView = viewHolder.get(id);
      if (childView == null) {
        childView = view.findViewById(id);
        viewHolder.put(id, childView);
      }
      return (T) childView;
    }
  }
}
Java Source Code List
