private Bitmap loadImageFile(final String filename, final AssetManager manager) {
InputStream is = null;
try {
Bitmap bmp = null;
// Bitmap bmp = BitmapCache.getInstance().getBitmap(filename,
// param.getAssetManager());
BufferedInputStream buf;
try {
buf = new BufferedInputStream(param.getAssetManager().open(filename));
bmp = BitmapFactory.decodeStream(buf);
} catch (IOException e) {
e.printStackTrace();
}
return bmp;
} catch (Exception e) {
Log.e(this.getClass().getSimpleName(), "fetchDrawable failed", e);
} finally {
try {
if (is != null) is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPostExecute(Bitmap bitmap) {
if (isCancelled()) {
bitmap = null;
}
if (imageViewReference != null) {
final WaterfallFlowView imageView = imageViewReference.get();
if (imageView != null) {
if (bitmap != null) {
int width = bitmap.getWidth(); // 获取真实宽高
int height = bitmap.getHeight();
LayoutParams lp = imageView.getLayoutParams();
lp.height = (height * param.getItemWidth()) / width; // 调整高度
imageView.setLayoutParams(lp);
imageView.bitmap = bitmap;
imageView.setImageBitmap(imageView.bitmap); // 将引用指定到同一个对象，方便销毁
Handler h = imageView.getViewHandler();
Message m =
h.obtainMessage(this.param.what, this.param.getFlowId(), lp.height, imageView);
h.sendMessage(m);
}
}
}
}
@Override
protected Bitmap doInBackground(WaterfallFlowTag... params) {
param = params[0];
return loadImageFile(param.getFileName(), param.getAssetManager());
}
