i have a gallery view, with a BaseAdapter, and i download images from internet, download the image, and set to gallery async. There are about 2000 images. When i rotate the screen, the asyntask continues, but the gallery set empty and dont show any now or old image.
This is the code of BaseAdapter:
private class AdaptadorImagenes extends BaseAdapter {
private Context contexto = null;
private ArrayList<Integer> datos = new ArrayList<Integer>();
public AdaptadorImagenes(Context contexto) {
this.contexto = contexto;
}
public void addItem(Integer posicion) {
datos.add(posicion);
notifyDataSetChanged();
}
@Override
public int getCount() {
return datos.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imagen = new ImageView(contexto);
imagen.setImageBitmap(getBitMapRedimensionado(position));
imagen.setScaleType(ScaleType.FIT_XY);
return imagen;
}
/**
* Metodo para redimensionar un bimap
*
* @param posicion
* del bitmap en una lista que contiene los path
* @return bitmap redimensionado
*/
private Bitmap getBitMapRedimensionado(int posicion) {
File fichero = new File(pathImagenes.get(posicion));
Bitmap bmOriginal = redondeaEsquinasBitmap(Bitmap
.createScaledBitmap(
BitmapFactory.decodeFile(fichero.toString()), 210,
210, true));
return bmOriginal;
}
/**
* Metodo para redondear las esquinas de un bitmap
*
* @param bitmap
* a redondear
* @return bitmap redondeado
*/
public Bitmap redondeaEsquinasBitmap(Bitmap bitmap) {
Bitmap salida = Bitmap.createBitmap(bitmap.getWidth(),
bitmap.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(salida);
final int color = 0xff424242;
final Paint paint = new Paint();
final Rect rect = new Rect(0, 0, bitmap.getWidth(),
bitmap.getHeight());
final RectF rectF = new RectF(rect);
final float roundPx = 12;
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, rect, rect, paint);
return salida;
}
}
In the Manifiest i set android:configChanges="keyboardHidden|orientation"
I think save in a variable how many images have downloaded yet and when rotate the screen set all the images, but when are more than 500 this process is very slow.
Any idea?Thanks
