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POWhat is the relationship between ListView and using ArrayAdapter to show arraylist?
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  1. POWhat is the relationship between ListView and using ArrayAdapter to show arraylist?
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    copied!<p>I have been for the past several hours trying to do something that I think should be trivial. I keep reading answers on stackoverflow but its not jiving with me. people show examples of <code>ArrayAdapters</code> accepting string <code>ArrayLists</code> on stackoverflow. This is just not working for me. </p> <p><a href="https://stackoverflow.com/questions/5070830/populating-a-listview-using-arraylist">Populating a ListView using an ArrayList?</a></p> <p>I am trying to understand what is going on here. If I am dealing with an arraylist of type String that means that the only thing I can bind the data to is a textview and certainly not a listview unless I create my own custom link adapter class? This just seems like I am missing some information. I would thing this problem would be so common a solution would have been made. My code is below and I am getting the "<code>E/ArrayAdapter(5106): You must supply a resource ID for a TextView</code>" error. </p> <pre><code>public class Favorites extends Activity{ UserFunctions userFunctions = new UserFunctions(); ArrayAdapter&lt;String&gt; arrayAdapter1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.favoritespage); arrayAdapter1 = new ArrayAdapter&lt;String&gt;(Favorites.this,android.R.layout.activity_list_item); new DownloadDataTask().execute(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_main_screen, menu); return true; } private class DownloadDataTask extends AsyncTask&lt;JSONArray, JSONArray, ArrayList&lt;String&gt; &gt; { @Override protected ArrayList&lt;String&gt; doInBackground(JSONArray... params) { JSONArray json = userFunctions.ziplistrequest("39", "-74", "50"); ArrayList&lt;String&gt; zipcodes = new ArrayList&lt;String&gt;(); for(int i=0; i &lt; json.length() ; i++) { JSONObject jarray = null; try { jarray = json.getJSONObject(i); String zip = jarray.getString("ZIPCODE"); zipcodes.add(zip); arrayAdapter1.add(zip); Log.d(zip,"Output"); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } } return zipcodes; } protected void onPostExecute(ArrayList&lt;String&gt; result){ ListView listView = (ListView) findViewById(R.id.list); arrayAdapter1.addAll(result); listView.setAdapter(arrayAdapter1); } } </code></pre> <p>}</p>
 

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