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POPopulating an autocompletetextview with results from a php powered webservice
 

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  1. POPopulating an autocompletetextview with results from a php powered webservice
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    <p>I am trying to develop an app which updates an autocomplete view with json data from a webservice.</p> <p>Using a textwatcher, I check in the ontextchanged callback and create an asynctask object which makes a non-blocking call to the webservice to get the results. When text is entered, any running asynctask objects are cancelled and a new one is generated( since an asynctask is a sort of singleton and I cannot rerun it). </p> <p>The results are then added to the autocomplete view by clearing its ArrayAdapter and adding each new item.</p> <p>The problem is that the data is almost never retrieved from the server, be it due to the constant cancels or whatever.</p> <p>Is there correct solution for doing this, or has anybody ever achieved such a task succesfully?</p> <p>Below are the relevant code snippets. TextWatcher, </p> <pre><code>public void onTextChanged(CharSequence s, int start, int before, int count) { Log.i("Text watcher", suggestsThread.getStatus().toString()); if(s.length() &gt;= suggestions.getThreshold() &amp;&amp; suggestsThread.getStatus() != AsyncTask.Status.RUNNING) { suggestsThread.cancel(true); suggestsThread = new WertAgentThread(); suggestsThread.execute(s.toString()); } </code></pre> <p>}</p> <p>Updating the autocomplete task,</p> <pre><code>public void updateSuggestions(String[] suggestions) { if( suggestions != null) { try { for(int ctr = 0; ctr &lt; suggestions.length; ctr++) { this.logger.append(suggestions[ctr]); } suggestAdapter = new ArrayAdapter&lt;String&gt;(this, R.layout.suggestions, suggestions); this.suggestions.setAdapter(suggestAdapter); } catch(NullPointerException ex) { Log.e("Updating adapter", ex.toString()); } } </code></pre> <p>The updateSuggestions is called in the onPostExecute callback in the Asynctask. Appreciating your help in advance,</p> <p>Roland.</p>
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