问JsonObject JsonArray解析问题

EN

public static ArrayList<CycloneData> extractFeatureFromJson(String cycloneJSON) {

    // Create an empty ArrayList to start adding Cyclones to
    ArrayList<CycloneData> cyclones = new ArrayList<>();

    // try to parse the cycloneJSON response string. If there's a problem with the way the JSON
    // is formatted, a JSONException exception object will be thrown.
    // Catch the exception, and print the error message to the logs.

    try {

        JSONObject rootJsonObject = new JSONObject(cycloneJSON);

        // Create JSONArray associated with the key called "currenthurricane", which represents
        // a list of cyclones from JSON response.
        JSONArray currentHurricaneArray = rootJsonObject.getJSONArray("currenthurricane");

        //Loop through each section in the currentHurricaneArray array & create an
        //{@link CycloneData} object for each one
        for (int i = 0; i < currentHurricaneArray.length(); i++) {
            //Get cyclone JSONObject at position i in the array
            JSONObject cycloneProperties = currentHurricaneArray.getJSONObject(i);
            //Extract “stormName_Nice” for Cyclone's name
            String name = cycloneProperties.optString("stormName_Nice");
            // Extract the value for the key called "url"
            String url = cycloneProperties.optString("url");
            int category = cycloneProperties.optInt("SaffirSimpsonCategory");
            CycloneData cyclone = new CycloneData(category, name, url);
            //Add new cyclone to list
            cyclones.add(cyclone);
        }

    } catch (JSONException e) {
        // If an error is thrown when executing any of the above statements in the "try" block,
        // catch the exception here, so the app doesn't crash. Print a log message
        // with the message from the exception.
        Log.e("Utils", "Problem parsing the cyclone JSON results", e);
    }

    // Return the list of cyclones
    return cyclones;
}

for (int i = 0; i < currentHurricaneArray.length(); i++) {
            //Get cyclone JSONObject at position i in the array
            JSONObject cycloneProperties = currentHurricaneArray.getJSONObject(i);

            // Extract "stormInfo" object
            JSONObject stormInfo = cycloneProperties.optJSONObject("stormInfo");
            //Extract “stormName_Nice” & "requesturl" for Cyclone's name and url
            String name = stormInfo.optString("stormName_Nice");
            String url = stormInfo.optString("requesturl");

            // Extract "Current" object
            JSONObject Current = cycloneProperties.optJSONObject("Current");
            // Extract "SaffirSimpsonCategory" key
            int category = Current.optInt("SaffirSimpsonCategory");

            CycloneData cyclone = new CycloneData(category, name, url);
            //Add new cyclone to list
            cyclones.add(cyclone);
        }