回收器視圖中的Picasso圖像加載問題

Question

實際上，當我單擊卡片查看項目時，它不顯示圖像，而是使用json和picasso精確加載的數據。請問有什么錯誤可以解決您在picasso庫中的輝煌問題？

public class SeconActivity extends Activity
{
RecyclerView recyclerView;
List<Shop> shops;
String serverUrl = "http://yoursubshop.com/webservices/categories-shop.php?    category=";
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.seocnd_main);
    recyclerView = (RecyclerView) findViewById(R.id.secondmain);
    LinearLayoutManager ll = new LinearLayoutManager(SeconActivity.this);
    recyclerView.setHasFixedSize(true);
    recyclerView.setLayoutManager(ll);
    Intent in = getIntent();
    String serverUrlId = in.getStringExtra("ks");
    serverUrl = serverUrl.concat(serverUrlId);
    new JsonTask().execute();
}

public class JsonTask extends AsyncTask<String, String, List<Shop>> {
    @Override
    protected List<Shop> doInBackground(String... params) {
        HttpURLConnection httpURLConnection = null;
        BufferedReader bufferedReader = null;
        try {
            URL url = new URL(serverUrl);
            httpURLConnection = (HttpURLConnection) url.openConnection();
            InputStreamReader inputStreamReader = new InputStreamReader(httpURLConnection.getInputStream());
            bufferedReader = new BufferedReader(inputStreamReader);
            StringBuffer sb = new StringBuffer();
            String line = "";
            while ((line = bufferedReader.readLine()) != null) {
                sb.append(line);
            }
            String finaljson = sb.toString();
            JSONObject firstobject = new JSONObject(finaljson);
            JSONArray firstarray = firstobject.getJSONArray("data");
           /* List<Your> yo = new ArrayList<>();
            for (int i = 0; i < firstarray.length(); i++) {
                JSONObject finalobject = firstarray.getJSONObject(i);
                Your y = new Your();
                y.setCategory_id(finalobject.getString("category_id"));
                y.setCategory_name(finalobject.getString("category_name"));
                yo.add(y);*/
            List<Shop> yo = new ArrayList<>();
            for (int i = 0; i < firstarray.length(); i++) {
                JSONObject finalobject = firstarray.getJSONObject(i);
                Shop yos = new Shop();
                yos.shop_id = finalobject.getString("shop_id");
                yos.shop_name= finalobject.getString("shop_name");
                yos.Shop_logo=finalobject.getString("shop_logo");
                yo.add(yos);
            }
            return yo;
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        } finally {
            if (httpURLConnection != null) {
                httpURLConnection.disconnect();
            }
            try {
                if (bufferedReader != null) {

                    bufferedReader.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return null;
    }

    @Override
    protected void onPostExecute(List<Shop> result) {
        super.onPostExecute(result);
        Rvadapter listAdapter = new Rvadapter(SeconActivity.this, result);
        recyclerView.setAdapter(listAdapter);

    }
}

public class Rvadapter extends RecyclerView.Adapter<Rvadapter.Myadapter> {
    List<Shop> yours = Collections.emptyList();
    Context c;
    public class Myadapter extends RecyclerView.ViewHolder {
        TextView id;
        TextView name;
        ImageView image;
        CardView cv;
        public Myadapter(final View itemView) {
            super(itemView);
            id = (TextView) itemView.findViewById(R.id.shopt);
            name = (TextView) itemView.findViewById(R.id.shopr);
            image = (ImageView)itemView.findViewById(R.id.image);
            cv = (CardView)itemView.findViewById(R.id.card);

        }
    }
    public Rvadapter(Context c, List<Shop> yours) {
        this.yours = yours;
        this.c = c;
    }
    @Override
    public Myadapter onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.shopss, parent, false);
        Myadapter m = new Myadapter(v);
        return m;
    }

    @Override
    public void onBindViewHolder(Myadapter holder, int position) {
        Shop  y = yours.get(position);
        holder.id.setText(y.shop_id);
        holder.name.setText(y.shop_name);
        Picasso.with(c)
                .load(y.Shop_logo)
                .into(holder.image);

    }
    @Override
    public int getItemCount() {
        return yours == null ? 0 : yours.size();
    }



       @Override
        public void onAttachedToRecyclerView(RecyclerView recyclerView) {
            super.onAttachedToRecyclerView(recyclerView);
        }
    }
}

Answer 1

當使用滑行時，圖像視圖的大小應該是預定義的或與父項匹配。 當滑行無法估算身高或體重時，它不會加載任何東西。 因此，請在適配器中放置imageview的高度和重量的負載。

如果確實存在尺寸測量問題，則可以使用Picasso庫更正該問題。

從這里您將獲得詳細的指南，以區分這兩個庫。