リストビューにデータをロードした後、サーバーから画像をロードしたい。この問題について多くのトピックが存在することは知っていますが、解決策が見つかりません...
これは私のコードです：
//asyncTackClass for loadingpictures
public class LoadImagesThread extends AsyncTask<Bundle, Void, Bitmap> {
private ImageView view;
private Bitmap bm;
private Context context;
private final WeakReference<ImageView> imageViewReference;
private final String BUNDLE_URL = "url";
private final String BUNDLE_NAME = "name";
private final String BUNDLE_BM = "bm";
public LoadImagesThread(Context context, ImageView view) {
this.context=context;
imageViewReference = new WeakReference<ImageView>(view);
}
@Override
protected Bitmap doInBackground(Bundle... b) {
Bitmap bm =null;
if (StorageHelper.getBitmap(b[0].getString(BUNDLE_NAME)) != null) { // Check the sdcard
bm = StorageHelper.getBitmap(b[0].getString(BUNDLE_NAME));
Log.w("LoadImagesThread", "Get image from sdcard : "+b[0].getString(BUNDLE_NAME));
} else { // Check the server
bm = ServiceHelper.getBitmapFromURL(b[0].getString(BUNDLE_URL));
StorageHelper.saveBitmap(bm, b[0].getString(BUNDLE_NAME)); // Save image on sdcard
Log.w("LoadImagesThread", "Get image from server : "+b[0].getString(BUNDLE_NAME));
}
return bm;
}
@Override
protected void onPostExecute(final Bitmap bm) {
super.onPostExecute(bm);
if (bm != null){ //if bitmap exists...
view = imageViewReference.get();
// Fade out
Animation fadeOutAnimation = AnimationUtils.loadAnimation(context, R.anim.fadeoutimage);
fadeOutAnimation.setAnimationListener(new AnimationListener() {
public void onAnimationStart(Animation animation) {
}
public void onAnimationRepeat(Animation animation) {
}
public void onAnimationEnd(Animation animation) {
// Fade in
view.setImageBitmap(bm);
Animation fadeInAnimation = AnimationUtils.loadAnimation(context, R.anim.fadeinimage);
view.startAnimation(fadeInAnimation);
}
});
// Launch the fadeout
view.startAnimation(fadeOutAnimation);
}else{ //if not picture, display the default ressource
view.setImageResource(R.drawable.productcarre);
}
}
}
このコードは、ImageView にビットマップを表示するために使用されます。
そして、これはアダプターです：
public class ListViewShoplistStoresAdapter extends BaseAdapter {
private ArrayList<Shop> shopList;
private Activity activity;
private HashMap<Integer, ImageView> views;
private final String BUNDLE_URL = "url";
private final String BUNDLE_NAME = "name";
private final String BUNDLE_POS = "pos";
private final String BUNDLE_ID = "id";
public ListViewShoplistStoresAdapter(Activity activity, ArrayList<Shop> shopList) {
super();
this.activity = activity;
this.shopList = shopList;
this.views = new HashMap<Integer, ImageView>();
}
public int getCount() {
return shopList.size();
}
public Object getItem(int position) {
return shopList.get(position);
}
public long getItemId(int position) {
return shopList.get(position).getId();
}
private class ViewHolder {
public TextView store;
public TextView name;
public ImageView ImageStore;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder view;
LayoutInflater inflator = activity.getLayoutInflater();
if(convertView == null) {
view = new ViewHolder();
convertView = inflator.inflate(R.layout.listviewshops, null);
view.store = (TextView) convertView.findViewById(R.id.store);
view.name = (TextView) convertView.findViewById(R.id.name);
view.ImageStore = (ImageView) convertView.findViewById(R.id.imgstore);
convertView.setTag(view);
}else {
view = (ViewHolder) convertView.getTag();
}
Typeface regular=Typeface.createFromAsset(activity.getAssets(), "fonts/RobotoRegular.ttf");
view.store.setTypeface(regular);
Typeface light=Typeface.createFromAsset(activity.getAssets(), "fonts/RobotoLight.ttf");
view.store.setTypeface(light);
Brand brand = StorageHelper.getBrand(activity, shopList.get(position).getBrandId());
if (brand == null) {
Log.e("SetShopInAdapter","Brand null");
Toast.makeText(activity, "Impossible d'afficher la liste de magasins", Toast.LENGTH_LONG).show();
} else {
view.store.setText(brand.getName());
view.name.setText(shopList.get(position).getName());
view.ImageStore.setImageResource(R.drawable.productcarre);
}
Bundle b = new Bundle();
//url of the pict
b.putString(BUNDLE_URL, ServiceHelper.getImageUrl("brand", brand.getName()));
// name of image
b.putString(BUNDLE_NAME, ServiceHelper.getCleanImageName(brand.getName()));
//position in the listView
b.putInt(BUNDLE_POS, position);
//id of the current object
b.putInt(BUNDLE_ID, brand.getId());
//put info in the map in order to display in the onPostExecute
if(views.get(position)==null){
views.put(position, view.ImageStore);
// launch thread
new LoadImagesThread(activity.getApplicationContext(), view.ImageStore).execute(b);
}
return convertView;
}
}
というわけで、GridViewだと問題なかったのですが、ListViewだと最初の項目だけ画像が変わってしまいます！
例：「車」「家」「りんご」の商品画像を表示したい。コードはスレッドを起動し、すべての画像 (車、家、最後にリンゴ) が最初のアイテム (車のアイテム) に表示されます...そして家とリンゴは画像を持っていません!!
私が何をすべきか知っていますか？
ありがとう