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我正在將我的HTTP調用轉換爲來自同步調用的異步調用。因爲連接在後臺運行，所以當我最初設置我的列表適配器時，數據不在那裏。我怎樣才能讓我的HTTP調用後更新列表適配器？我已經嘗試了一些東西，例如在數據發回並重新設置適配器之前不設置適配器，但沒有任何工作。這裏是我當前的OnCreate代碼在異步更新後更新Android Listview
protected void onCreate(Bundle savedInstanceState) {
overridePendingTransition(R.layout.anim_out,R.layout.anim_in);
setTheme(R.style.Theme_D_theme);
setContentView(R.layout.news_fragment);
super.onCreate(savedInstanceState);
text = (TextView) this.findViewById(R.id.nomore);
list = (ListView) this.findViewById(R.id.newslist);
list.setDividerHeight(2);
new MyAsyncTask().execute("THIS");
list.setOnItemClickListener(this);
list.setCacheColorHint(Color.WHITE);
adapter = new SimpleAdapter(this, x, R.layout.drill1_listview,
new String[] {"title","content","distance", "image"},
new int[] {R.id.title, R.id.content, R.id.distance, R.id.image});
}
而且我AsyncTast
private class MyAsyncTask extends AsyncTask<String, Integer, Double>{
@Override
protected Double doInBackground(String... params) {
// TODO Auto-generated method stub
postData(params[0]);
return null;
}
protected void onPostExecute(Double result){
//pb.setVisibility(View.GONE);
Toast.makeText(getApplicationContext(), "command sent", Toast.LENGTH_LONG).show();
}
protected void onProgressUpdate(Integer... progress){
//pb.setProgress(progress[0]);
}
public void postData(String valueIWantToSend) {
ThreadPolicy tp = ThreadPolicy.LAX;
StrictMode.setThreadPolicy(tp);
HttpClient httpclient = new DefaultHttpClient();
String type = getIntent().getExtras().getString("type");
HttpGet httppost = new HttpGet("http://myip.../all?latitude=42.12345&longitude=-76.2154");
InputStream inputStream = null;
try {
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
String JSONstring = EntityUtils.toString(entity);
Log.w("HTTPRESPONSE", JSONstring);
//Toast.makeText(this, JSONstring, Toast.LENGTH_SHORT).show();
if (!(JSONstring.equals(" 0"))) {
JSONArray array = new JSONArray(JSONstring);
for (int i = 0; i < array.length(); i++) {
JSONObject row = array.getJSONObject(i);
HashMap<String,String> temp = new HashMap<String,String>();
String thisid = row.getString("id");
ider.add(thisid);
String starthold = row.getString("start_time");
start.add(starthold);
String endhold = row.getString("end_time");
end.add(endhold);
String latitudehold = row.getString("latitude");
latitude.add(latitudehold);
String longitudehold = row.getString("longitude");
longitude.add(longitudehold);
String addresshold = row.getString("street");
address.add(addresshold);
String title = row.getString("company");
company.add(title);
temp.put("title", title);
String distance_hold = row.getString("distance");
distance.add(distance_hold);
temp.put("distance", distance_hold);
int[] images = new int[] { R.drawable.local_eat,R.drawable.local_eat,
R.drawable.local_drink, R.drawable.local_shop,
R.drawable.local_do, R.drawable.local_chance,
R.drawable.local_all };
String image = row.getString("promo_type");
temp.put("image", Integer.toString(images[Integer.valueOf(image)]));
String description = row.getString("name");
name.add(description);
temp.put("content", description);
x.add(temp);
}
}
} catch (Exception e) {
// Oops
} finally {
try{if(inputStream != null)inputStream.close();}catch(Exception squish){}
}
}
}
發表您的AsyncTask以及 –
@BirajZalavadia添加 – centreee