【发布时间】：2018-04-12 06:07:14
【问题描述】：
我想在片段中显示从 API 调用到回收器视图的信息，但回收器视图不显示信息。 Api 显示 GET 方法，需要在 Recycler View 中显示列表。
这是我的模特
public class PhoneModel {
public PhoneModel() {
}
private int amount;
private String amount_display;
public int getAmount() {
return amount;
}
public void setAmount(int amount) {
this.amount = amount;
}
public String getAmount_display() {
return amount_display;
}
public void setAmount_display(String amount_display) {
this.amount_display = amount_display;
}
}
这是我的适配器。我只想在回收站视图中显示一个信息。
public class PhoneAdapter extends RecyclerView.Adapter<PhoneAdapter.PhoneViewHolder> {
private ArrayList<PhoneModel> listItems;
private Context context;
LayoutInflater inflater;
public PhoneAdapter(Context context) {
this.listItems = new ArrayList<>();
this.context = context;
inflater = LayoutInflater.from(context);
}
@Override
public PhoneViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = inflater.from(parent.getContext())
.inflate(R.layout.view_holder_phone,parent,false);
return new PhoneViewHolder(v);
}
@Override
public void onBindViewHolder(PhoneViewHolder holder, int position) {
holder.test.setText(listItems.get(position).getAmount_display());
}
@Override
public int getItemCount() {
return listItems.size();
}
public void add(PhoneModel model) {
listItems.add(model);
notifyDataSetChanged();
}
public void clear() {
listItems.clear();
notifyDataSetChanged();
}
public class PhoneViewHolder extends RecyclerView.ViewHolder {
private TextView test;
private TextView currentBal;
public PhoneViewHolder(View itemView) {
super(itemView);
test = itemView.findViewById(R.id.tv_deposit);
currentBal = itemView.findViewById(R.id.tv_current_bal);
}
}
}
这是我与手机型号和手机适配器连接的活动。
public class HistoryFragment extends Fragment {
private final static String TAG = HistoryFragment.class.getSimpleName();
private PhoneAdapter phoneAdapter;
private RecyclerView recyclerView;
public HistoryFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_history, container, false);
recyclerView = view.findViewById(R.id.recycler_history);
LinearLayoutManager mLinearLayoutManager = new LinearLayoutManager(getActivity(),
LinearLayoutManager.VERTICAL, false);
recyclerView.setLayoutManager(mLinearLayoutManager);
phoneAdapter = new PhoneAdapter(getContext());
recyclerView.setAdapter(phoneAdapter);
phoneHistory();
return view;
}
private void phoneHistory(){
StringRequest request = new StringRequest(
Request.Method.GET,
ServerApi.URL_PHONE,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Gson gson = new GsonBuilder().create();
JSONObject jsonObject = null;
if(response != null) {
try {
jsonObject = new JSONObject(response);
PhoneModel phoneModel = gson.fromJson(jsonObject.getJSONObject("value").toString(), PhoneModel.class);
phoneAdapter.add(phoneModel);
} catch (JSONException e) {
Log.d(TAG, e.getLocalizedMessage());
}
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getActivity(), error.getLocalizedMessage(), Toast.LENGTH_LONG).show();
}
}
) {
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<>();
headers.put("Content-Type", "application/x-www-form-urlencoded");
return headers;
}
};
Volley.newRequestQueue(getContext()).add(request);
}
}
【问题讨论】：
-
你确定你从 api 响应中获取数据吗？
标签： android android-recyclerview