问无法通过Picasso和Target成功加载图像

EN

//Get Bitmap
                            targetForBitmap = new Target() {
                                @Override
                                public void onBitmapLoaded (final Bitmap responseBitmap, Picasso.LoadedFrom from){

                                    bitmap = responseBitmap;
                                }

                                @Override
                                public void onPrepareLoad(Drawable placeHolderDrawable) {
                                    Log.i("prepareLoad", "onPrepereLoad ääääääääääääääääääää ");
                                }

                                @Override
                                public void onBitmapFailed(Drawable errorDrawable) {
                                    Log.i("onBitmapFailed", "onBitmapFailed xxxxxxxxxxxxxxxx");
                                }
                            };

                            String url = "Http://" + server_wan + ":" + port_wan + "/" + server_path + "/Produktbilder/" + product_image + ".png";
                            Log.i("url", url);
                            Picasso.with(SpeisekarteActivity.this)
                                    .load(url)
                                    .into(targetForBitmap);