CODEWITHSUNDEEP
androidjsongoogle-places-api
MoMoney
MoMoney

Reputation: 1224

Android Parse Google Places API JSON

I'm trying to take the information from the JSON returned by Google Places. 

jsonObj = new JSONObject(data);
JSONArray results = jsonObj.getJSONArray("results");

for (int i = 0; i < results.length(); i++) {  
    JSONObject result = results.getJSONObject(i);
    System.out.println(result.getString("name"));

    if (result.getJSONArray("reviews") != null){
         JSONArray reviewsArray = result.getJSONArray("reviews");
         JSONObject reviews = reviewsArray.getJSONObject(0);
         if (reviews != null){
              String review = reviews.getString("text");  
              Log.d("tag", "review: " + review);
         }  
    }

}

My question is, how can I make sure the either "name" or "reviews" are available to parse? that if (result.getJSONArray("reviews") != null) still fails because getJSONArray is empty.

Upvotes: 0

Views: 1831

Answers (2)

Submersed
Submersed

Reputation: 8870

Since your json is initially in the form of a JSONObject, you could use it's isNull(String name) helper method to check if a mapping exists and isn't null.

From the documentation:

isNull(String name) Returns true if this object has no mapping for name or if it has a mapping whose value is NULL.

For example:

try {

jsonObj = new JSONObject(data);
if(!jsonObj.isNull("results")){
  JSONArray results = jsonObj.getJSONArray("results");

  for (int i = 0; i < results.length(); i++) {  
      JSONObject result = results.getJSONObject(i);
      if(!result.isNull("name"){
          System.out.println(result.getString("name"));
      }

      if (result.getJSONArray("reviews") != null){
           JSONArray reviewsArray = result.getJSONArray("reviews");
           JSONObject reviews = reviewsArray.getJSONObject(0);
           if (reviews != null){
                String review = reviews.getString("text");  
                Log.d("tag", "review: " + review);
           }  
        }
     }
  }
} catch(JSONException e){
     //Something went wrong
}

Upvotes: 0

Bobbake4
Bobbake4

Reputation: 24857

You can do this by using the opt commands instead of the get commands. Change the get json array to the following:

(result.optJSONArray("reviews") != null)

Check out the JSONObject documentation for a complete list. You can also use the JSONObject has(String name) command to check if it exists before actually getting it.

Upvotes: 2

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