我正在尝试在中显示列表视图onPostExecute，我尝试以不同的方式进行操作，但无法显示数据。我在 logcat 中没有收到任何错误，也没有看到任何 forceclose。
class LoadAlltopics extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Topic.this);
pDialog.setMessage("Loading Topics. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
protected String doInBackground(String... args) {
List<NameValuePair> params = new ArrayList<NameValuePair>();
JSONObject json = jsonParser.makeHttpRequest(url_get_topicid, "GET", params);
System.out.println("Group Sucess1");
Log.d("All Groups: ", json.toString());
System.out.println("Group Success");
try {
int success = json.getInt(TAG_SUCCESS);
System.out.println("Group Success2");
if (success == 1) {
System.out.println("Group Success3");
groups = json.getJSONArray(TAG_GROUP);
System.out.println("Result Success+++"+groups);
for (int i = 0; i < groups.length();i++) {
JSONObject c = groups.getJSONObject(i);
String tname = c.getString(TAG_TOPICNAME);
System.out.println("Checking ::"+tname);
//String lname = c.getString(TAG_LEVELNAME);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_TOPICNAME, tname);
//map.put(TAG_LEVELNAME,lname);
// adding HashList to ArrayList
groupList.add(map);
tnamelist.add(tname);
System.out.println("Topic Sucess");
}
List<String> newList = new ArrayList<String>(new HashSet<String>(tnamelist));
for(int j=0;j<newList.size();j++){
List<String> temp=new ArrayList<String>();
System.out.println("TopicList Success"+tnamelist);
//for(int k=0;k<groupList.size();k++){
JSONObject c = groups.getJSONObject(j);
String tname = c.getString(TAG_TOPICNAME);
//String lname = c.getString(TAG_LEVELNAME);
//if(tname.equalsIgnoreCase(newList.get(j).toString())){
// temp.add(lname);
System.out.println("Success Success Success :"+tname);
}
//lnamelist.add(temp);
}else {
showAlert();
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
private void showAlert() {
// TODO Auto-generated method stub
}
protected void onPostExecute(String file_url) {
super.onPostExecute(toString());
pDialog.dismiss();
groupnamelist=new ArrayList<String>(new HashSet<String>(tnamelist));
System.out.println("List Success :"+tnamelist);
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
viewList = Topic.this.getLayoutInflater().inflate(R.layout.topic_row, null);
dialogMarketList = new Dialog(Topic.this);
dialogMarketList.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialogMarketList.setContentView(viewList);
dialogMarketList.show();
lvForDialog = (ListView) viewList.findViewById(R.id.ListView);
ArrayAdapter<String> adapter =(new ArrayAdapter<String>(Topic.this,R.layout.list_row, groupnamelist));
lvForDialog.setAdapter(adapter);
//lv = (ListView) findViewById(R.id.ListView);
//ArrayAdapter<String>adapter=new ArrayAdapter<String>(Topic.this,android.R.layout.simple_list_item_1,groupnamelist);
//lv.setAdapter(adapter);