爲什麼不能讓我分析JSON？

Question

我想分析這個鏈接的JSON文件：http://maps.googleapis.com/maps/api/directions/json?origin=33.7489,-84.3881&destination=33.7514,-84.7478&sensor=false

我想解析「html_instructions」字符串，從「步驟」數組作爲這樣的：

String googledirectionsapi = "http://maps.googleapis.com/maps/api/directions/json?origin=" + origin + "&destination=" + destination0 + "&sensor=false";      
        try { 
         JSONObject googleObject = Directions.getJSONfromURL(googledirectionsapi); 
         JSONArray parsedGoogleDirections = googleObject.getJSONArray("routes").getJSONArray("steps");  
         thing.setText(googledirectionsapi); 
         if(parsedGoogleDirections.equals("")){ 
          Toast.makeText(FindDealer.this, "Cannot find suitable route", Toast.LENGTH_LONG).show(); 
         }else{       
          for (int i = 0; i < parsedGoogleDirections.length(); i++) { 
            JSONObject instructions = parsedGoogleDirections.getJSONObject(i);    
            if (i == 0){ 
             String step1 = parsedGoogleDirections.getString("html_instructions"); 

          } 
          } 
          } 
        }catch (JSONException e) { 
           Log.d("log_tag","JSON parsing error - Google Directions Api:" + e.getMessage()); 
         } 

但是，日食是給我在錯誤：

.getJSONArray("steps"); //<-- The method getJSONArray(int) in the type JSONArray is not applicable for the arguments (String). 

和，也給我的錯誤在：

.getString("html_instructions"); //<--he method getString(int) in the type JSONArray is not applicable for the arguments (String) 

爲什麼eclipse會顯示這些錯誤？我以前從未遇到過這個問題。先謝謝你。

Answer 1

有一個類似的問題：JSON parsing of Google Maps API in Android App

我想你應該首先從JsonArray使用索引獲取一個對象。然後，你應該得到像陣列的腿。然後你應該從腿陣列中得到一個對象。那麼你可以得到步驟數組。

https://stackoverflow.com/a/7237305/538408