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Android Build a Blog Reader Android App Adapting Data for Display in a List Filling Our String Array and Creating the Adapter

Posted by MUZ140118 Cathrine Makuya
MUZ140118 Cathrine Makuya
10,300 Points

stage 4 challenge task 2

After your for loop, declare an ArrayAdapter variable named 'adapter' and initialize it with its constructor. Remember that ArrayAdapter is a generic, meaning that the type of the items in the array needs to be specified in angle brackets. The constructor takes three parameters: 1) the context (use 'this'), 2) the layout (use android.R.layout.simple_list_item_1) and 3) the array to adapt.

CodeChallenge.java 
/*** This code is an excerpt from a class that extends ListActivity ***/

JSONArray jsonVideos = jsonData.getJSONArray("videos");
String[] titles = new String[jsonVideos.length()];

 for (int i = 0; i < jsonVideos.length(); i++) {
    JSONObject posts = jsonVideos.getJSONObject(i); 
   titles[i] = posts.getString("title");}

ArrayAdapter<String> adapter = new ArrayAdapter<String> (this, android.R.layout.simple_list_item_1,jsonVideos ) }







// Write for loop here!
;
data.json 
{
  "id":"PL4C60560903672EF7",
  "author":"gotreehouse",
  "title":"Just For Fun",
  "description":"Just plain old funny videos.",
  "videos":[
    {
      "id":"UQzBS4eGtl0",
      "uploaded":"2013-02-06T15:37:37.000Z",
      "uploader":"gotreehouse",
      "category":"Education",
      "title":"Treehouse Just Landed!"      
    },
    {
      "id":"jQNXtyoyHic",
      "uploaded":"2012-04-25T14:51:19.000Z",
      "uploader":"gotreehouse",
      "category":"Entertainment",
      "title":"Meet Mike the Frog | Treehouse"
    },
    {
      "id":"fHpAQadEZIs",
      "uploaded":"2013-02-06T15:37:31.000Z",
      "uploader":"gotreehouse",
      "category":"Education",
      "title":"Getting Started with HTML5 JavaPress"
    },
    {
      "id":"PKFPW3do6ks",
      "uploaded":"2013-02-06T15:37:41.000Z",
      "uploader":"gotreehouse",
      "category":"Education",
      "title":"EYC Outtakes with Mike the Frog"
    }
  ]
}

1 Answer

Greg Schmidt
Greg Schmidt
5,908 Points

The key part which isn't right is the array you are adapting. You are adapting the array: titles

ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, titles);