title: How to Get the images from cached image file into drawable
body: <p>I load images from an URL and save as cache file. Now I want to get the cached images into a drawable. How can I do this?
  I load the images from url by using this ImageLoader class</p>
  
  <pre><code>public class ImageLoader {
  
  MemoryCache memoryCache=new MemoryCache();
  FileCache fileCache;
  private Map&lt;ImageView, String&gt; imageViews=Collections.synchronizedMap(new WeakHashMap&lt;ImageView, String&gt;());
  ExecutorService executorService;
  Handler handler=new Handler();//handler to display images in UI thread
  Bitmap bitmap;
  public ImageLoader(Context context){
      fileCache=new FileCache(context);
      executorService=Executors.newFixedThreadPool(5);
  }
  
  final int stub_id=R.drawable.ic_launcher;
  public void DisplayImage(String url, ImageView imageView)
  {
      imageViews.put(imageView, url);
     bitmap  =memoryCache.get(url);
      if(bitmap!=null)
          imageView.setImageBitmap(bitmap);
      else
      {
          queuePhoto(url, imageView);
          imageView.setImageResource(stub_id);
      }
  }
  
  private void queuePhoto(String url, ImageView imageView)
  {
      PhotoToLoad p=new PhotoToLoad(url, imageView);
      executorService.submit(new PhotosLoader(p));
  }
  
  private Bitmap getBitmap(String url) 
  {
      File f=fileCache.getFile(url);
  
      //from SD cache
      Bitmap b = decodeFile(f);
      if(b!=null)
          return b;
  
      //from web
      try {
          Bitmap bitmap=null;
          URL imageUrl = new URL(url);
          HttpURLConnection conn = (HttpURLConnection)imageUrl.openConnection();
          conn.setConnectTimeout(30000);
          conn.setReadTimeout(30000);
          conn.setInstanceFollowRedirects(true);
          InputStream is=conn.getInputStream();
          OutputStream os = new FileOutputStream(f);
          Utils.CopyStream(is, os);
          os.close();
          conn.disconnect();
          bitmap = decodeFile(f);
          return bitmap;
      } catch (Throwable ex){
         ex.printStackTrace();
         if(ex instanceof OutOfMemoryError)
             memoryCache.clear();
         return null;
      }
  }
  
  //decodes image and scales it to reduce memory consumption
  private Bitmap decodeFile(File f){
      try {
          //decode image size
          BitmapFactory.Options o = new BitmapFactory.Options();
          o.inJustDecodeBounds = true;
          FileInputStream stream1=new FileInputStream(f);
          BitmapFactory.decodeStream(stream1,null,o);
          stream1.close();
  
          //Find the correct scale value. It should be the power of 2.
          final int REQUIRED_SIZE=70000;
          int width_tmp=o.outWidth, height_tmp=o.outHeight;
          int scale=1;
          while(true){
              if(width_tmp/2&lt;REQUIRED_SIZE || height_tmp/2&lt;REQUIRED_SIZE)
                  break;
              width_tmp/=2;
              height_tmp/=2;
              scale*=2;
          }
  
          //decode with inSampleSize
          BitmapFactory.Options o2 = new BitmapFactory.Options();
          o2.inSampleSize=scale;
          FileInputStream stream2=new FileInputStream(f);
          Bitmap bitmap=BitmapFactory.decodeStream(stream2, null, o2);
          stream2.close();
          return bitmap;
      } catch (FileNotFoundException e) {
      } 
      catch (IOException e) {
          e.printStackTrace();
      }
      return null;
  }
  
  //Task for the queue
  private class PhotoToLoad
  {
      public String url;
      public ImageView imageView;
      public PhotoToLoad(String u, ImageView i){
          url=u; 
          imageView=i;
      }
  }
  
  class PhotosLoader implements Runnable {
      PhotoToLoad photoToLoad;
      PhotosLoader(PhotoToLoad photoToLoad){
          this.photoToLoad=photoToLoad;
      }
  
      @Override
      public void run() {
          try{
              if(imageViewReused(photoToLoad))
                  return;
              Bitmap bmp=getBitmap(photoToLoad.url);
              memoryCache.put(photoToLoad.url, bmp);
              if(imageViewReused(photoToLoad))
                  return;
              BitmapDisplayer bd=new BitmapDisplayer(bmp, photoToLoad);
              handler.post(bd);
          }catch(Throwable th){
              th.printStackTrace();
          }
      }
  }
  
  boolean imageViewReused(PhotoToLoad photoToLoad){
      String tag=imageViews.get(photoToLoad.imageView);
      if(tag==null || !tag.equals(photoToLoad.url))
          return true;
      return false;
  }
  
  //Used to display bitmap in the UI thread
  class BitmapDisplayer implements Runnable
  {
      Bitmap bitmap;
      PhotoToLoad photoToLoad;
      public BitmapDisplayer(Bitmap b, PhotoToLoad p){bitmap=b;photoToLoad=p;}
      public void run()
      {
          if(imageViewReused(photoToLoad))
              return;
          if(bitmap!=null)
              photoToLoad.imageView.setImageBitmap(bitmap);
          else
              photoToLoad.imageView.setImageResource(stub_id);
      }
  }
  
  public void clearCache() {
      memoryCache.clear();
      fileCache.clear();
  }
  </code></pre>
  
  <p>}</p>
  
  <p>The following is the method I created in main Activity</p>
  
  <pre><code>private String[] mStrings = {
              "my url image1.jpg"
              "my url image2.jpg"
              "my url image3.jpg"
  
  
  
      };
      ImageLoader imgldr;
      private Bitmap loadBitmap(int width, int height, int index) {
          Bitmap b = Bitmap.createBitmap(width, height,
                  Bitmap.Config.ARGB_8888);
          b.eraseColor(0xFFFFFFFF);
          Canvas c = new Canvas(b);
          ImageView imageView = new ImageView(getBaseContext());
          int padding = getBaseContext().getResources().getDimensionPixelSize(
                  R.dimen.padding_large);
          imageView.setPadding(padding, padding, padding, padding);
          imageView.setScaleType(ImageView.ScaleType.FIT_XY);
  
          /**In the below line i need to get the cahe file as drawable**/
          /**im getting error in this line**/
          Drawable d = imgldr.DisplayImage(mStrings[index], imageView);
  
          int margin = 7;
          int border = 3;
          Rect r = new Rect(margin, margin, width - margin, height - margin);
  
          int imageWidth = r.width() - (border * 2);
          int imageHeight = imageWidth * d.getIntrinsicHeight()
                  / d.getIntrinsicWidth();
          if (imageHeight &gt; r.height() - (border * 2)) {
              imageHeight = r.height() - (border * 2);
              imageWidth = imageHeight * d.getIntrinsicWidth()
                      / d.getIntrinsicHeight();
          }
  
          r.left += ((r.width() - imageWidth) / 2) - border;
          r.right = r.left + imageWidth + border + border;
          r.top += ((r.height() - imageHeight) / 2) - border;
          r.bottom = r.top + imageHeight + border + border;
  
          Paint p = new Paint();
          p.setColor(0xFFC0C0C0);
          c.drawRect(r, p);
          r.left += border;
          r.right -= border;
          r.top += border;
          r.bottom -= border;
  
          d.setBounds(r);
          d.draw(c);
  
          return b;
      }
  </code></pre>