java直接向Arraylist实现if语句
我正在使用RecyclerView和CardView。我希望系统根据JSON中的环境选择要显示的ImageView。我该怎么做?我实现了if语句,但该语句似乎不起作用。有人能给我一个建议吗。这是我第一次编写解析程序。我对它了解不多
package com.morimoku.location_activity;
import 安卓.app.DownloadManager;
import 安卓.content.res.Resources;
import 安卓.os.Bundle;
import 安卓.view.LayoutInflater;
import 安卓.view.View;
import 安卓.view.ViewGroup;
import 安卓.widget.ArrayAdapter;
import 安卓.widget.Button;
import 安卓.widget.ListView;
import 安卓.widget.TextView;
import 安卓x.annotation.Nullable;
import 安卓x.fragment.app.Fragment;
import 安卓x.recyclerview.widget.LinearLayoutManager;
import 安卓x.recyclerview.widget.RecyclerView;
import com.安卓.volley.Request;
import com.安卓.volley.RequestQueue;
import com.安卓.volley.Response;
import com.安卓.volley.VolleyError;
import com.安卓.volley.toolbox.JsonObjectRequest;
import com.安卓.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
public class favaoritesFragment extends Fragment {
public static TextView data;
private RecyclerView.Adapter mAdapter;
private RequestQueue mQueue;
private RecyclerView.LayoutManager mLayoutManager;
int i1;
int i2;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState){
View view = inflater.inflate(R.layout.fragment_favorites,container,false);
mQueue = Volley.newRequestQueue(getActivity());
ArrayList<Status> statusArrayList = new ArrayList<>();
statusArrayList.add(new Status(R.drawable.ic_action_name,"Line 1", (i1 == 0)?
R.drawable.ic_check_box_black_24dp: R.drawable.ic_warning_black_24dp));
statusArrayList.add(new Status(R.drawable.ic_action_name,"Line 2", (i2 == 0)?
R.drawable.ic_check_box_black_24dp: R.drawable.ic_warning_black_24dp));
mAdapter = new RecyclerAdapter(statusArrayList);
RecyclerView mRecyclerView = view.findViewById(R.id.recyclerView);
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));//listView.setAdapter(adapter);
mRecyclerView.setAdapter(mAdapter);
return view;
}
private void jsonParse() {
String url = ("URL");
JsonObjectRequest request = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
JSONArray jsonArray = response.getJSONArray("odpt.TrainInformation:Line 1");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject negishi = jsonArray.getJSONObject(i);
String negishis = negishi.getString("odpt:trainInformationText");
if (negishis.equals( "operating normally")) {
i1 = 0;
} else {
i1 = 1;
}
}
JSONArray jsonArray1 = response.getJSONArray("odpt.TrainInformation:Line 2");
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject negishi2 = jsonArray.getJSONObject(i);
String negishis2 = negishi2.getString("odpt:trainInformationText");
if (negishis2 .equals( "operating normally")) {
i2 = 0;
} else {
i2 = 1;
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
});
}}
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