我需要在特定情况下显示项目。我做了那个。我有三个标签。在第一个标签A中，我显示项目列表，只有一个项目存在。但是当你移动时到标签B并再次来到标签A，我们可以看到两个项目。我需要避免重复项目显示，如何做到这一点，如果你有想法请帮助我，提前谢谢你 这是我的代码：
List View list;
ListViewAdapter adapter;
ArrayList<String> title_array = new ArrayList<String>();
ArrayList<String> title_array1 = new ArrayList<String>();
ArrayList<String> title_array2 = new ArrayList<String>();
ArrayList<String> title_array3 = new ArrayList<String>();
ArrayList<String> title_array4 = new ArrayList<String>();
ArrayList<String> title_array5 = new ArrayList<String>();
ArrayList<String> title_array6 = new ArrayList<String>();
String response_value;
JSONObject result;
JSONArray tokenList;
JSONObject oj5;
String appid;
JSONObject oj;
String fileid;
HttpEntity entity;
String status ,borrowername,coborrowername,loannumber,addrs1,city;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.menu_frame, container, false);
list = (ListView) rootView.findViewById(R.id.listview);
// Pass results to ListViewAdapter Class
new AsyncTaskParseJson().execute();
return rootView;
}
// you can make this class as another java file so it will be separated from your main activity.
public class AsyncTaskParseJson extends AsyncTask<String, String, String> {
final String TAG = "AsyncTaskParseJson.java";
// contacts JSONArray
JSONArray dataJsonArr = null;
@Override
protected void onPreExecute() {}
@Override
protected String doInBackground(String... arg0) {
// post the specific format data to json url
try {
HttpClient httpClient = new DefaultHttpClient();
JSONObject object = new JSONObject();
object.put("Username", "******");
object.put("Password", "******");
JSONObject jsonObject = new JSONObject();
jsonObject.put("Authentication", object);
jsonObject.put("RequestType", 4);
HttpPost postMethod = new HttpPost("*********");
postMethod.setEntity(new StringEntity(jsonObject.toString()));
postMethod.setHeader("Accept", "application/json");
postMethod.setHeader("Content-type", "application/json");
HttpResponse response = httpClient.execute(postMethod);
entity = response.getEntity();
response_value = EntityUtils.toString(entity).toString();
// Log.e(TAG, response_value);
if (entity != null) {
//Convert String to JSON Object
JSONObject result = new JSONObject(response_value);
JSONArray tokenList = result.getJSONArray("Files");
}
} catch (Exception e) {
e.printStackTrace();
}
return response_value;
}
@Override
protected void onPostExecute(String response_value) {
super.onPostExecute(response_value);
// dismiss the dialog after getting all products
try
{
if (entity != null) {
result = new JSONObject(response_value);
tokenList = result.getJSONArray("Files");
for(int i=0;i<=tokenList.length();i++)
{
oj = tokenList.getJSONObject(i);
String oj1 = oj.getString("FileID");
JSONObject oj12= (JSONObject) tokenList.getJSONObject(i).get("Borrower");
JSONObject oj2 = (JSONObject) tokenList.getJSONObject(i).get("CoBorrower");
JSONObject oj3 = (JSONObject) tokenList.getJSONObject(i).get("LoanDetails");
JSONObject oj4 = (JSONObject) tokenList.getJSONObject(i).get("PropertyAddress");
fileid = oj.getString("FileID");
borrowername = oj12.getString("FirstName");
coborrowername = oj2.getString("FirstName");
loannumber = oj3.getString("LoanNumber");
addrs1 = oj4.getString("Address1");
city = oj4.getString("City");
JSONArray orders = oj.getJSONArray("Orders");
for(int n=0;n<orders.length();n++){
JSONObject oj5 = orders.getJSONObject(n);
appid = oj5.getString("ApplicationOrderId");
String duedate = oj5.getString("DueDate");
status = oj5.getString("Status");
// Log.e(TAG, appid +"/"+ appid1);
Log.e(TAG, appid + "/" + borrowername + "/"+ coborrowername + "/"+ addrs1 + "/"+ city + "/"+ loannumber + fileid );
if(status.equals("1")){
title_array3.add("New");
title_array1.add(addrs1 + " ,"+ city);
title_array.add(borrowername +" , "+coborrowername);
title_array2.add("Duedate");
// title_array3.add(status);
title_array4.add(appid);
title_array5.add(loannumber);
title_array6.add(fileid);
list.setOnItemClickListener(new OnItemClickListener() {
@Override public void onItemClick(AdapterView<?> arg0, View arg1,int position, long arg3)
{
Intent first = new Intent(getActivity(),DetailView.class);
first.putExtra("fileid", fileid);
startActivity(first);
} });
}
}
}
}
}
catch(Exception e)
{
e.printStackTrace();
}
adapter = new ListViewAdapter(getActivity(), title_array,title_array1,title_array2,title_array3,title_array4,title_array5,title_array6);
list.setAdapter(adapter);
}
}
}