这里的新手,我正在开发一个简单的应用程序,它基于我的作业的api数据显示位置列表。
我计划做一个简单的回收视图,显示预览图像,地名和地方评级。
下面是包含对象数组的json
[
{
"xid":"N2180835380",
"name":"Stasiun Waytuba",
"rate":3,
"osm":"node/2180835380",
"wikidata":"Q19741325",
"kinds":"industrial_facilities,railway_stations,interesting_places",
"point":{
"lon":104.411728,
"lat":-4.379512
}
},
{
"xid":"N5374585862",
"name":"Stasiun Martapura",
"rate":3,
"osm":"node/5374585862",
"wikidata":"Q19741099",
"kinds":"other,unclassified_objects,interesting_places,tourist_object",
"point":{
"lon":104.346565,
"lat":-4.316566
}
},
{
...
}
]
但是,图像url不存在于该json上,而是存在于另一个json上,该json是特定项的细节。
{
"xid":"N2180835380",
"name":"Stasiun Waytuba",
"address":{
"state":"Lampung",
"country":"Indonesia",
"village":"Way Tuba",
"postcode":"34767",
"country_code":"id"
},
"rate":"3",
"osm":"node/2180835380",
"wikidata":"Q19741325",
"kinds":"industrial_facilities,railway_stations,interesting_places",
"sources":{
"geometry":"osm",
"attributes":[
"osm",
"wikidata"
]
},
"otm":"https://opentripmap.com/en/card/N2180835380",
"wikipedia":"https://id.wikipedia.org/wiki/Stasiun%20Way%20Tuba",
"image":"https://commons.wikimedia.org/wiki/File:Stasiun_Waytuba_08-2015.jpg",
"preview":{
"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Stasiun_Waytuba_08-2015.jpg/400px-Stasiun_Waytuba_08-2015.jpg",
"height":293,
"width":400
},
"wikipedia_extracts":{
"title":"id:Stasiun Way Tuba",
"text":"Stasiun Way Tuba (WAY) adalah stasiun kereta api kelas II yang berada di Way Tuba, Way Tuba, Way Kanan. Stasiun yang terletak pada ketinggian +81 meter ini termasuk ke dalam Divisi Regional IV Tanjungkarang. Stasiun ini mempunyai 2 jalur rel dengan jalur 2 merupakan sepur lurus.Semua perjalanan kereta api yang melayani rute Kertapati–Tanjungkarang pasti berhenti di stasiun ini.",
"html":"<p><b>Stasiun Way Tuba</b> (<b>WAY</b>) adalah stasiun kereta api kelas II yang berada di Way Tuba, Way Tuba, Way Kanan. Stasiun yang terletak pada ketinggian +81 meter ini termasuk ke dalam Divisi Regional IV Tanjungkarang. Stasiun ini mempunyai 2 jalur rel dengan jalur 2 merupakan sepur lurus.</p><p>Semua perjalanan kereta api yang melayani rute Kertapati–Tanjungkarang pasti berhenti di stasiun ini.</p>"
},
"point":{
"lon":104.411728,
"lat":-4.379512
}
}
这是一个json数据,包含第一个列表中的位置细节。
这是我的代码,因为我不知道如何在jsonarrayrequest中获取图像url,所以现在我只显示带有name和rating的列表。
package com.example.explorev10;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.os.Bundle;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
public class PlaceListActivity extends AppCompatActivity {
private RecyclerView mRecyclerView;
private PlaceAdapter mPlaceAdapter;
private ArrayList<PlaceItem> mPlaceList;
private RequestQueue mRequestQueue;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_place_list);
mRecyclerView = findViewById(R.id.recycle_view_place_list);
mRecyclerView.setHasFixedSize(true);
mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
mPlaceList = new ArrayList<>();
mRequestQueue = Volley.newRequestQueue(this);
parseJSON();
}
private void parseJSON() {
String jsonURL = "https://api.opentripmap.com/0.1/en/places/bbox?lon_min=104.268781&lat_min=-5.780249&lon_max=105.755215&lat_max=-4.101807&kinds=interesting_places&format=json&apikey=5ae2e3f221c38a28845f05b65ba166329393551235361ab9b66e2889";
JsonArrayRequest request = new JsonArrayRequest(Request.Method.GET, jsonURL, null,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
try {
for (int i = 0; i < response.length(); i++) {
JSONObject place = response.getJSONObject(i);
String placeName = place.getString("name");
int placeRating = place.getInt("rate");
String imageURL = "";
mPlaceList.add(new PlaceItem(imageURL, placeName, placeRating));
}
mPlaceAdapter = new PlaceAdapter(PlaceListActivity.this, mPlaceList);
mRecyclerView.setAdapter(mPlaceAdapter);
} catch (JSONException e) {
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
error.printStackTrace();
}
});
mRequestQueue.add(request);
}
}
如何在for循环中访问作为jsonobject的place细节?有人能帮帮我吗??非常感谢。。对不起,英语不好
1条答案
按热度按时间gk7wooem1#
在places pojo类中存储xid,并在第一个api的响应侦听器中调用第二个api,而不是调用recycler视图,一旦第二个api响应完成,就将列表传递给recycler视图