Question

我想在此链接解析JSON文件：http://maps.googleapis.com/maps/api/directions/json?origin=33.7489,-84.3881&destination=33.7514,-84.7478&sensor=false

我想从“steps”数组中解析“html_instructions”字符串：

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());
                        }

然而，eclipse在给我错误：

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

并且还给我错误：

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

为什么eclipse会显示这些错误？我以前从未遇到过这个问题。提前感谢你。

Answer 1

有一个类似的问题：JSON parsing of Google Maps API in Android App

我认为你首先应该使用索引从JsonArray获取一个Object。然后你应该得到腿作为数组。然后你应该从腿数组得到一个对象。然后你可以获得步骤数组。

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

为什么eclipse不允许我解析JSON？

1 个答案: