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package de.danoeh.antennapod.asynctask;
import android.content.res.TypedArray;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.TransitionDrawable;
import android.os.Handler;
import android.util.Log;
import android.widget.ImageView;
import de.danoeh.antennapod.AppConfig;
import de.danoeh.antennapod.PodcastApp;
import de.danoeh.antennapod.R;
import de.danoeh.antennapod.asynctask.ImageLoader.ImageWorkerTaskResource;
import de.danoeh.antennapod.util.BitmapDecoder;
public class BitmapDecodeWorkerTask extends Thread {
protected int PREFERRED_LENGTH;
public static final int FADE_DURATION = 500;
/**
* Can be thumbnail or cover
*/
protected int imageType;
private static final String TAG = "BitmapDecodeWorkerTask";
private ImageView target;
protected CachedBitmap cBitmap;
protected ImageLoader.ImageWorkerTaskResource imageResource;
private Handler handler;
private final int defaultCoverResource;
public BitmapDecodeWorkerTask(Handler handler, ImageView target,
ImageWorkerTaskResource imageResource, int length, int imageType) {
super();
this.handler = handler;
this.target = target;
this.imageResource = imageResource;
this.PREFERRED_LENGTH = length;
this.imageType = imageType;
this.defaultCoverResource = android.R.color.transparent;
}
/**
* Should return true if tag of the imageview is still the same it was
* before the bitmap was decoded
*/
protected boolean tagsMatching(ImageView target) {
Object tag = target.getTag(R.id.imageloader_key);
return tag != null && tag.equals(imageResource.getImageLoaderCacheKey());
}
protected void onPostExecute() {
// check if imageview is still supposed to display this image
if (tagsMatching(target) && cBitmap.getBitmap() != null) {
Drawable[] drawables = new Drawable[]{
PodcastApp.getInstance().getResources().getDrawable(android.R.color.transparent),
new BitmapDrawable(PodcastApp.getInstance().getResources(), cBitmap.getBitmap())
};
TransitionDrawable transitionDrawable = new TransitionDrawable(drawables);
target.setImageDrawable(transitionDrawable);
transitionDrawable.startTransition(FADE_DURATION);
} else {
if (AppConfig.DEBUG)
Log.d(TAG, "Not displaying image");
}
}
@Override
public void run() {
cBitmap = new CachedBitmap(BitmapDecoder.decodeBitmapFromWorkerTaskResource(
PREFERRED_LENGTH, imageResource), PREFERRED_LENGTH);
if (cBitmap.getBitmap() != null) {
storeBitmapInCache(cBitmap);
} else {
Log.w(TAG, "Could not load bitmap. Using default image.");
cBitmap = new CachedBitmap(BitmapFactory.decodeResource(
target.getResources(), defaultCoverResource),
PREFERRED_LENGTH);
}
if (AppConfig.DEBUG)
Log.d(TAG, "Finished loading bitmaps");
endBackgroundTask();
}
protected final void endBackgroundTask() {
handler.post(new Runnable() {
@Override
public void run() {
onPostExecute();
}
});
}
protected void onInvalidStream() {
cBitmap = new CachedBitmap(BitmapFactory.decodeResource(
target.getResources(), defaultCoverResource), PREFERRED_LENGTH);
}
protected void storeBitmapInCache(CachedBitmap cb) {
ImageLoader loader = ImageLoader.getInstance();
if (imageType == ImageLoader.IMAGE_TYPE_COVER) {
loader.addBitmapToCoverCache(imageResource.getImageLoaderCacheKey(), cb);
} else if (imageType == ImageLoader.IMAGE_TYPE_THUMBNAIL) {
loader.addBitmapToThumbnailCache(imageResource.getImageLoaderCacheKey(), cb);
}
}
}
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