自動完成textview google地方api描述 - > place_id

Question

我使用Google的自動完成位置來獲取位置預測。 現在，當他們點擊其中一個預測時，我想獲取place_id，但我不知道該怎麼做？

這是我PlcaesAutoCompleteAdapter：

public class PlacesAutoCompleteAdapter extends ArrayAdapter<String> implements Filterable { 
    private ArrayList<String> resultList; 

    public PlacesAutoCompleteAdapter(Context context, int textViewResourceId) { 
     super(context, textViewResourceId); 
    } 

    @Override 
    public int getCount() { 
     return resultList.size(); 
    } 

    @Override 
    public String getItem(int index) { 
     return resultList.get(index); 
    } 

    @Override 
    public Filter getFilter() { 
     Filter filter = new Filter() { 
      @Override 
      protected FilterResults performFiltering(CharSequence constraint) { 
       FilterResults filterResults = new FilterResults(); 
       if (constraint != null) { 
        // Retrieve the autocomplete results. 
        resultList = autocomplete(constraint.toString()); 

        // Assign the data to the FilterResults 
        filterResults.values = resultList; 
        filterResults.count = resultList.size(); 
       } 
       return filterResults; 
      } 

      @Override 
      protected void publishResults(CharSequence constraint, FilterResults results) { 
       if (results != null && results.count > 0) { 
        notifyDataSetChanged(); 
       } 
       else { 
        notifyDataSetInvalidated(); 
       } 
      }}; 
     return filter; 
    } 

    private static final String PLACES_API_BASE = "https://maps.googleapis.com/maps/api/place"; 
    private static final String TYPE_AUTOCOMPLETE = "/autocomplete"; 
    private static final String OUT_JSON = "/json"; 

    private static final String API_KEY = ""; 

    private static final String LOG_TAG = "ExampleApp"; 



    private ArrayList<String> autocomplete(String input) { 
     ArrayList<String> resultList = null; 



     HttpURLConnection conn = null; 
     StringBuilder jsonResults = new StringBuilder(); 
     try { 
      StringBuilder sb = new StringBuilder(PLACES_API_BASE + TYPE_AUTOCOMPLETE + OUT_JSON); 
      sb.append("?key=" + API_KEY); 
      sb.append("&input=" + URLEncoder.encode(input, "utf8")); 

      URL url = new URL(sb.toString()); 
      conn = (HttpURLConnection) url.openConnection(); 
      InputStreamReader in = new InputStreamReader(conn.getInputStream()); 

      // Load the results into a StringBuilder 
      int read; 
      char[] buff = new char[1024]; 
      while ((read = in.read(buff)) != -1) { 
       jsonResults.append(buff, 0, read); 
      } 
     } catch (MalformedURLException e) { 
      Log.e(LOG_TAG, "Error processing Places API URL", e); 
      return resultList; 
     } catch (IOException e) { 
      Log.e(LOG_TAG, "Error connecting to Places API", e); 
      return resultList; 
     } finally { 
      if (conn != null) { 
       conn.disconnect(); 
      } 
     } 

     try { 
      // Create a JSON object hierarchy from the results 
      JSONObject jsonObj = new JSONObject(jsonResults.toString()); 
      JSONArray predsJsonArray = jsonObj.getJSONArray("predictions"); 

      // Extract the Place descriptions from the results 
      resultList = new ArrayList<String>(predsJsonArray.length()); 
      for (int i = 0; i < predsJsonArray.length(); i++) { 
       resultList.add(predsJsonArray.getJSONObject(i).getString("description")+ "," + predsJsonArray.getJSONObject(i).getString("place_id")); 
      } 
     } catch (JSONException e) { 
      Log.e(LOG_TAG, "Cannot process JSON results", e); 
     } 

     return resultList; 
    } 

} 

現在我這樣稱呼它在我mainactivity：

autoCompView = (AutoCompleteTextView) getActivity().findViewById(R.id.txtEventLocation); 
     autoCompView.setAdapter(new PlacesAutoCompleteAdapter(getActivity(), R.layout.places_autocomplete_item)); 


     //When click on autocomplete suggestion 
     autoCompView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
      public void onItemClick(AdapterView<?> listView, View view, 
            int position, long id) { 

       String str = (String) listView.getItemAtPosition(position); 
       Toast.makeText(getActivity(), str, Toast.LENGTH_SHORT).show(); 

      } 
     }); 

當他們點擊它，我想要得到的place_id，而不是描述。 所以我展示的描述，他們可以點擊它，但我想要得到它的place_id ..

Answer 1

你可以改變你的​​一個ArrayList<HashMap<String, String>>，這樣就可以同時存儲的地方ID和描述。

改變你這行代碼

resultList = new ArrayList<String>(predsJsonArray.length()); 
    for (int i = 0; i < predsJsonArray.length(); i++) { 
     resultList.add(predsJsonArray.getJSONObject(i).getString("description")+ "," + predsJsonArray.getJSONObject(i).getString("place_id")); 
    } 

這些行：

resultList = new ArrayList<HashMap<String, String>>(predsJsonArray.lengtgh()); 
for (int i = 0; i < predsJsonArray.length();, i++) { 
    HashMap<String, String> place = new HashMap<String, String>(); 
    String description = predsJsonArray.getJSONObject(i).getString("description"); 
    String placeId = predsJsonArray.getJSONObject(i).getString("place_id"); 
    place.put("description", description); 
    place.put("place_id", placeId); 
    resultList.add(place); 
} 

也能改變你public class PlacesAutoCompleteAdapter extends ArrayAdapter<String>到public class PlacesAutoCompleteAdapter extends ArrayAdapter<HashMap<String, String>>

此外，改變你的

@Override 
public String getItem(int index) { 
    return resultList.get(index); 
} 

到這些行：

@Override 
Public HashMap<String, String> getItem(int index) { 
    return resultList.get(index); 
}