當我只顯示字符串數(shù)據(jù)時，它似乎顯示正常，但是當我嘗試顯示 int 或 double 時，RecyclerView 不會填充。我從 Google 地方 API JSON 中提取。我想也許這就是我使用我的onBindViewHolder()? 謝謝// MainActivityprivate void getJson() { String URL = https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=40.7085,-74.003124&opennow&radius=5000&type=restaurant&key= JsonObjectRequest root = new JsonObjectRequest(Request.Method.GET, URL, null, new Response.Listener<JSONObject>() { @Override public void onResponse(JSONObject response) { try { JSONArray results = response.getJSONArray("results"); Log.d("RESULTS", String.valueOf(results)); for(int i = 0; i<results.length(); i++) { JSONObject resultsObj = results.getJSONObject(i); mImageUrls.add(resultsObj.getString("icon")); mTitle.add(resultsObj.getString("name")); //mRating.add(resultsObj.getDouble("rating")); mPriceLevel.add(resultsObj.getInt("price_level")); } getRecyclerView(); } catch (JSONException e) { e.printStackTrace(); } } },new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { } }); mRequestQueue.add(root);}private void getRecyclerView() { // LinearLayoutManager recyclerView = findViewById(R.id.recyclerView); adapter = new RecyclerViewAdapter(mImageUrls, mTitle, mPriceLevel, this); recyclerView.setAdapter(adapter); recyclerView.setLayoutManager(new LinearLayoutManager(this)); recyclerView.setHasFixedSize(true);}而RecyclerViewAdapter班級是。
3 回答
冉冉說
TA貢獻1877條經(jīng)驗 獲得超1個贊
這樣做的原因是您沒有將 Double 轉(zhuǎn)換為 String 將此行更改holder.rating.setText(rRatings.get(position));為holder.rating.setText(String.valueOf(rRatings.get(position)));
偶然的你
TA貢獻1841條經(jīng)驗 獲得超3個贊
首先，您應(yīng)該檢查您獲得的評級是否為雙倍值?？赡苁窃谶@一行之后拋出異常
mRating.add(resultsObj.getDouble("rating"))同樣，@hooray_todd siggested textview 只采用字符串值，因此您必須將數(shù)據(jù)更改為字符串。
繁花如伊
TA貢獻2012條經(jīng)驗 獲得超12個贊
我建議您創(chuàng)建一個包含所有必要參數(shù)的對象，然后將該對象的單個列表傳遞給RecyclerViewAdapter.
public class MapElement {
public String name;
public String imageUrl;
public Double rating;
public Integer price;
}
然后ArrayList在您從getJson函數(shù)調(diào)用中獲得響應(yīng)時創(chuàng)建此對象的一個?，F(xiàn)在在您的適配器中只需使用單個MapElement對象列表來顯示那里的數(shù)據(jù)。
修改后的適配器應(yīng)如下所示。
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder>{
private static final String TAG = "RecyclerViewAdapter";
private ArrayList<MapElement> elements = new ArrayList<>();
private Context mContext;
public RecyclerViewAdapter(ArrayList<MapElement> elements, Context context) {
this.elements = elements;
mContext = context;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_item, parent, false);
ViewHolder holder = new ViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, final int position) {
Glide.with(mContext).asBitmap().load(rImageUrls.get(position)).into(holder.image);
holder.name.setText(elements.get(position).name);
holder.rating.setText(elements.get(position).rating);
holder.priceLevel.setText(elements.get(position).price);
holder.parentLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d(TAG, "onClick: clicked on an image: " + rNames.get(position));
Toast.makeText(mContext, elements.get(position).name, Toast.LENGTH_SHORT).show();
}
});
}
@Override
public int getItemCount() {
return elements.size();
}
public class ViewHolder extends RecyclerView.ViewHolder{
ImageView image;
TextView name;
TextView rating;
TextView priceLevel;
TextView address;
RelativeLayout parentLayout;
public ViewHolder(View itemView) {
super(itemView);
image = (ImageView) itemView.findViewById(R.id.image);
name = (TextView) itemView.findViewById(R.id.title);
rating = itemView.findViewById(R.id.rating);
priceLevel = (TextView) itemView.findViewById(R.id.priceLevel);
parentLayout = itemView.findViewById(R.id.parentLayout);
}
}
}
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