Using JSON data in the URLs found in my array

Question

I am trying to use the 2nd value of each of my JSON elemnts and use it in a array of web urls. What I am trying to end of with is a array of urls that include the image names from my json data below.

JSON Data:

[["1","Dragon Neck Tattoo","thm_polaroid.jpg","polaroid.jpg"],["2","Neck Tattoo","thm_default.jpg","default.jpg"],["3","Sweet Tattoo","thm_enhanced-buzz-9667-1270841394-4.jpg","enhanced-buzz-9667-1270841394-4.jpg"]]

MainActivity:

 Bundle bundle = getIntent().getExtras();
 String jsonData = bundle.getString("jsonData");


                try {

//THIS IS WHERE THE VALUES WILL GET ASSIGNED
                    JSONArray jsonArray = new JSONArray(jsonData);


        private String[] mStrings=
            {
                 for(int i=0;i<jsonArray.length();i++)
                    {
                       "http://www.mywebsite.com/images/" + jsonArray(i)(2),
                     }
             }


    list=(ListView)findViewById(R.id.list);
        adapter=new LazyAdapter(this, mStrings);
        list.setAdapter(adapter);



                } catch (JSONException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

Community · Accepted Answer · 2017-05-23 12:04:17Z

1

As I mentioned in a previous answer, a JSONArray is just an object, not a numerically-indexable array. It looks like you're having trouble with basic Java syntax, as well.

If you actually want to use a String[], not a List<String>:

private String[] mStrings = new String[jsonArray.length()];

for (int i=0; i<jsonArray.length(); i++)
{
    String url = jsonArray.getJSONArray(i).getString(2);
    mStrings[i] = "http://www.mywebsite.com/images/" + url;
}

If the LazyAdapter you're using can take a List, that'll be even easier to work with:

private List<String> mStrings = new ArrayList<String>();

for (int i=0; i<jsonArray.length(); i++)
{
    String url = jsonArray.getJSONArray(i).getString(2);
    mStrings.add("http://www.mywebsite.com/images/" + url);
}

edited May 23, 2017 at 12:04

CommunityBot

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answered Jul 28, 2011 at 4:41

Matt Ball

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3 Comments

Denoteone Over a year ago

Thanks. I am still trying to wrap my head around the syntax among many other basic things. +1 Could you help me with an example using List<Sting> Or should I ask on another post.

Matt Ball Over a year ago

Already edited my answer to include List<String>. BTW, try to be consistent and clean with your indentation - it will improve code readability significantly and make things easier in general.

Denoteone Over a year ago

Will do. Wish the tab key didn't focus on another window each time though.

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