全球動態數組列表不更新/函數修改而得到

Question

lat和長都具有當前位置的變量中，谷歌的地方搜索API JSON格式凌空響應

if(lat!=0.0||longg!=0.0){ 
search(); 
details(placeId); 
} 

這裏是search（）函數.... placeID是全球性的ArrayList的變量

public void search() { 
String url ="https://maps.googleapis.com/maps/api/place/nearbysearch/json?Location="+lat+","+longg+"&radius=5000&type=hospital&name=Hospital&key=AIzaSyA71lHTBWnb8uNvUI0N8ch8lhvla_0pM8"; 
Log.e("URL 1st : ", url); 
final ArrayList<String> idd = new ArrayList<>(); 
Response.Listener<JSONObject> myListener = new Response.Listener<JSONObject>() { 
@Override 
public void onResponse(JSONObject response) { 
String status = null; 
try { 
status = response.getString("status"); 
} catch (JSONException e) { 
e.printStackTrace(); 
} 
if (status != null && status.equals("ZERO_RESULTS")) { 
Log.e("Response Status: ", "search was successful but returned no results.This may occur if the search was passed a latlng in a remote location."); 
Toast.makeText(NearByHospitals.this, "You are in remote location.\nNo Nearby Hospitals", Toast.LENGTH_SHORT).show(); 
} else if (status != null && status.equals("OVER_QUERY_LIMIT")) { 
Log.e("Response Status: ", "indicates that you are over your quota."); 
} else if (status != null && status.equals("REQUEST_DENIED")) { 
Log.e("Response Status: ", "indicates that your request was denied, generally because of lack of an invalid key parameter."); 
} else if (status != null && status.equals("INVALID_REQUEST")) { 
Log.e("Response Status: ", "generally indicates that a required query parameter (location or radius) is missing."); 
} else { 
int sizeOfResponse = 0; 
try { 
sizeOfResponse = response.getJSONArray("results").length(); 
} catch (JSONException e) { 
e.printStackTrace(); 
} 
for (int i = 0; i < sizeOfResponse; i++) { 
try { 
if (response.getJSONArray("results").getJSONObject(i).has("opening_hours") && response.getJSONArray("results").getJSONObject(i).getJSONObject("opening_hours").getBoolean("open_now")) { 
placeId.add(response.getJSONArray("results").getJSONObject(i).getString("place_id")); 
Log.e("iddd", response.getJSONArray("results").getJSONObject(i).getString("place_id")); 
locat.add(String.valueOf(response.getJSONArray("results").getJSONObject(i).getJSONObject("geometry").getJSONObject("location").getDouble("lat")) + "," + String.valueOf(response.getJSONArray("results").getJSONObject(i).getJSONObject("geometry").getJSONObject("location").getDouble("lng"))); 
} 
} catch (JSONException e) { 
e.printStackTrace(); 
} 
} 
} 
} 
}; 
Response.ErrorListener myErrorListener = new Response.ErrorListener() { 
@Override 
public void onErrorResponse(VolleyError error) { 
Toast.makeText(NearByHospitals.this, error.getMessage(), Toast.LENGTH_LONG).show(); 
} 
}; 
JsonObjectRequest myRequest = new JsonObjectRequest(Request.Method.GET,url, null, myListener, myErrorListener); 
Volley.newRequestQueue(NearByHospitals.this).add(myRequest); 
} 

我想用placeId（全球ArrayList中）在我的個人資料作進一步的細節 這裏的功能是我的個人資料（）函數

public void details(ArrayList<String> strId) { 

    for (int i = 0; i < strId.size(); i++) { 
     try { 
      String url2 = "https://maps.googleapis.com/maps/api/place/details/json?placeid=" + strId.get(i) + "&key=AIzaSyA718lHTBWnb8uNvUI0N8ch8lhvla_0pM8"; 
      Log.e("URL2 ", url2); 
      Response.Listener<JSONObject> myListener2 = new Response.Listener<JSONObject>() { 
       @Override 
       public void onResponse(JSONObject response) { 
        String status = null; 
        try { 
         status = response.getString("status"); 
        } catch (JSONException e) { 
         e.printStackTrace(); 
        } 
        if (status != null && status.equals("ZERO_RESULTS")) { 
         Log.e("Response Status: ", "indicates that the reference was valid but no longer refers to a valid result. This may occur if the establishment is no longer in business."); 
        } else if (status != null && status.equals("OVER_QUERY_LIMIT")) { 
         Log.e("Response Status: ", "indicates that you are over your quota."); 
        } else if (status != null && status.equals("REQUEST_DENIED")) { 
         Log.e("Response Status: ", "indicates that your request was denied, generally because of lack of an invalid key parameter."); 
        } else if (status != null && status.equals("INVALID_REQUEST")) { 
         Log.e("Response Status: ", "generally indicates that the query (reference) is missing."); 
        } else { 
         if (status != null && status.equals("OK")) { 
          try { 
           hosNames.add(response.getJSONObject("result").getString("name")); 
           phoneNumbers.add(response.getJSONObject("result").getString("international_phone_number")); 

          } catch (JSONException e) { 
           e.printStackTrace(); 
          } 
         } 
        } 
       } 
      }; 
      Response.ErrorListener myErrorListener2 = new Response.ErrorListener() { 
       @Override 
       public void onErrorResponse(VolleyError error) { 
        Toast.makeText(NearByHospitals.this, error.getMessage(), Toast.LENGTH_LONG).show(); 
       } 
      }; 
      JsonObjectRequest myRequest2 = new JsonObjectRequest(Request.Method.GET, url2, null, myListener2, myErrorListener2); 
      Volley.newRequestQueue(NearByHospitals.this).add(myRequest2); 

     } catch (NullPointerException l) { 
      l.printStackTrace(); 
     } 
    } 

} 

但問題是placeId是空的，它的大小爲零。我在調試時檢查這個變量n一切都很好arraylist在調試時被修改。我不知道我在哪裏錯了？

Answer 1

從下面：

search(); 
details(placeId); 

在方法搜索（）你是一個異步線程修改placeId列表，這樣，當你運行的詳細信息（placeId），要傳遞作爲參數placeId不算不保證修改列表。您可能想要在填充placeId內的抽籤響應中調用詳細信息（placeId）。