I have had a good look at CWAC Endless adapter and a couple of others that do the same thing, but I cannot work out how to apply them to my current method of retrieving data, which populates 2 rows and a listview. Currently the data is retrieved via httpget in an ASync background task. The url is altered slightly to get each subsequent page (page=1.html, page=2.html etc).
I would like page 2 to load and append to the end of page 1 when the end is reached - I guess it is possible using CWACs method but I cannot work out how. Below is my code, help much appreciated.
My current system works absolutely fine for displaying a single page - but I would like the endless list loading.
private class MyTask extends AsyncTask<Void, Void, Void> {
private ProgressDialog progressDialog;
protected void onPreExecute() {
{progressDialog = ProgressDialog.show(TwitterPage.this,
"", "Loading. Please wait...", true);}
}
@Override
protected Void doInBackground(Void... arg0) {
SharedPreferences myPrefs = getPreferences(MODE_PRIVATE);
try {
String twitPlayers = getString(R.string.twit_players);
String twitClub = getString(R.string.twit_club);
String twitAndr = getString(R.string.twit_andr);
String twitMentions = getString(R.string.twit_mentions);
HttpClient hc;
HttpGet get;
HttpResponse rp;
if (myPrefs.getInt("FILTER_INT", 1) == 1){
hc = new DefaultHttpClient();
get = new
//All
HttpGet("http://search.twitter.com/search.json?q=" + twitMentions + "+OR+" + twitAndr + "+OR+from" + twitPlayers + "+OR+from" + twitClub + "&result_type=recent&rpp=15&page="+currentpage);
rp = hc.execute(get);}
else if (myPrefs.getInt("FILTER_INT", 1) == 2){
hc = new DefaultHttpClient();
get = new
........LOADS MORE IF STATEMENTS REMOVED AS NOT RELEVANT............
rp = hc.execute(get);}
if(rp.getStatusLine().getStatusCode() == HttpStatus.SC_OK)
{
String result = EntityUtils.toString(rp.getEntity());
JSONObject root = new JSONObject(result);
JSONArray sessions = root.getJSONArray("results");
for (int i = 0; i < sessions.length(); i++) {
JSONObject session = sessions.getJSONObject(i);
Tweet tweet = new Tweet();
tweet.content = session.getString("text");
tweet.author = session.getString("from_user");
tweets.add(tweet);
}
}
} catch (Exception e) {
Log.e("TwitterFeedActivity", "Error loading JSON", e);
}
return null;
}
@Override
protected void onPostExecute(Void result) {
{ progressDialog.dismiss();}
//setadapter
setListAdapter(new TweetListAdaptor(
TwitterPage.this, R.layout.list_item, tweets));
}
}
private class TweetListAdaptor extends ArrayAdapter<Tweet> {
private ArrayList<Tweet> tweets;
public TweetListAdaptor(Context context,
int textViewResourceId,
ArrayList<Tweet> items) {
super(context, textViewResourceId, items);
this.tweets = items;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater)
getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.list_item, null);
}
Tweet o = tweets.get(position);
TextView tt = (TextView) v.findViewById(R.id.toptext);
TextView bt = (TextView) v.findViewById(R.id.bottomtext);
tt.setText(o.content);
bt.setText(o.author);
return v;
}
}
