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我實現了一個ListView刪除項目的代碼。下面是我使用notifyDataSetChanged（）的代碼，但是當我使用context.recreate（）函數時，列表不刷新，並且項目位於單擊刪除按鈕上，然後再次加載所有頁面，並刪除項目。如何從Android ListView中刪除項目和notifyDataSetChanged（）不起作用
public class Shortlisted_custom extends ArrayAdapter<String> {
private static final String deleteURL = "http://192.168.2.110/xp/ajax_call.php?action=remove_shortlisted";
private static final String url1 = "http://192.168.2.110/xp/express_intrest.php";
private static final String KEY_MATRI_ID_TO="matriID_to";
private static final String KEY_MATRI_ID_BY="matriID_by";
int pos;
SessionManager session;
public String matri_id_to, matri_id_by, str_gender,strEI;
int selectedPosition;
Button btnremove,btnChat,declineButton;
private NetworkImageView imageView;
private ImageLoader imageLoader;
private String[] ids;
private String[] ages;
private String[] heights;
public String[] communities;
public String[] castes;
public String[] educations;
public String[] occupations;
public String[] incomes;
public String[] pics;
public String[] locations;
public String[] status;
public String[] expressinterest;
private Activity context;
public Shortlisted_custom(Activity context, String[] ids, String[] ages, String[] heights, String[] communities, String[] castes, String[] educations, String[] occupations, String[]incomes, String[]pics, String[] locations,String[] status, String[] expressinterest) {
super(context, R.layout.custom_shortlist,ids);
this.context = context;
this.ids = ids;
this.ages = ages;
this.heights = heights;
this.communities = communities;
this.castes = castes;
this.educations = educations;
this.occupations = occupations;
this.incomes = incomes;
this.pics = pics;
this.locations = locations;
this.status = status;
this.expressinterest = expressinterest;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
pos = position;
LayoutInflater inflater = context.getLayoutInflater();
final View listViewItem = inflater.inflate(R.layout.custom_shortlist, null, true);
// Session class instance
session = new SessionManager(getContext());
session.checkLogin();
// get user data from session
HashMap<String, String> user = session.getUserDetails();
matri_id_by = user.get(SessionManager.KEY_EMAIL);
str_gender = user.get(SessionManager.KEY_GENDER);
String url1 = "https://www.maangal.com/thumb/thumb_";
String url =url1+pics[position];
btnremove =(Button) listViewItem.findViewById(R.id.btnRemove);
btnChat =(Button) listViewItem.findViewById(R.id.VPButton);
declineButton = (Button)listViewItem.findViewById(R.id.btnEI);
imageView = (NetworkImageView) listViewItem.findViewById(R.id.offer_image);
TextView textViewId = (TextView) listViewItem.findViewById(R.id.textViewId);
TextView textViewName = (TextView) listViewItem.findViewById(R.id.textViewName);
textViewId.setText(ids[position]);
if(ages[position].equalsIgnoreCase("null") || status[position].equalsIgnoreCase("deleted")) {
textViewName.setText("This profile has been Deleted");
textViewName.setTextColor(Color.RED);
imageView.setVisibility(View.GONE);
btnremove.setVisibility(View.GONE);
btnChat.setVisibility(View.GONE);
declineButton.setVisibility(View.GONE);
}
else {
imageLoader = CustomVolleyRequest.getInstance(this.getContext()).getImageLoader();
if (str_gender.equalsIgnoreCase("Male")) {
imageLoader.get(url, ImageLoader.getImageListener(imageView, R.drawable.image, R.drawable.girl));
} else {
imageLoader.get(url, ImageLoader.getImageListener(imageView, R.drawable.image, R.drawable.boy));
}
imageView.setImageUrl(url, imageLoader);
textViewName.setText(ages[position] + " years" + " , " + heights[position] + " cm" + ", " + communities[position] + " : " + castes[position] + " , " + educations[position] + " , " + occupations[position] + " , " + incomes[position] + ", " + locations[position]);
imageView.setVisibility(View.VISIBLE);
btnremove.setVisibility(View.VISIBLE);
btnChat.setVisibility(View.VISIBLE);
declineButton.setVisibility(View.VISIBLE);
}
刪除按鈕onClickListener
btnremove.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
matri_id_to=ids[position];
selectedPosition = position;
delete();
Shortlisted_custom.this.notifyDataSetChanged();
// context.recreate();
}
});
btnChat.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(v.getContext(),BlankActivity.class);
Log.e("Id*******------------",ids[position].toString());
i.putExtra("ID", ids[position]);
i.putExtra("gender",str_gender);
i.putExtra("current_ID",matri_id_by);
v.getContext().startActivity(i);
}
});
strEI = expressinterest[position];
Log.e("EI-------------->", strEI.toString());
if(strEI.toString().equalsIgnoreCase("Accepted")) {
declineButton.setText(strEI);
declineButton.setBackgroundColor(Color.parseColor("#FF045B49"));
declineButton.setEnabled(false);
}
else if(strEI.toString().equalsIgnoreCase("Reject")){
declineButton.setText(strEI);
declineButton.setBackgroundColor(Color.parseColor("#FF045B49"));
declineButton.setEnabled(false);
}
else if(strEI.toString().equalsIgnoreCase("Declined")){
declineButton.setText(strEI);
declineButton.setBackgroundColor(Color.parseColor("#FF045B49"));
declineButton.setEnabled(false);
}
else if(strEI.toString().equalsIgnoreCase("Pending..")){
declineButton.setText(strEI);
declineButton.setBackgroundColor(Color.parseColor("#FF045B49"));
declineButton.setEnabled(false);
}
else
{
declineButton.setText(strEI);
}
declineButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
matri_id_to=ids[position];
selectedPosition = position;
express_Intrest();
}
});
return listViewItem;
}
public void express_Intrest(){
StringRequest stringRequest1 = new StringRequest(Request.Method.POST, url1, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
if(response.trim().equalsIgnoreCase("success")) {
expressinterest[selectedPosition] = "Pending..";
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getContext(), error.toString(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put(KEY_MATRI_ID_BY,matri_id_by);
params.put(KEY_MATRI_ID_TO,matri_id_to);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(getContext());
requestQueue.add(stringRequest1);
}
public void delete(){
StringRequest stringRequest1 = new StringRequest(Request.Method.POST, deleteURL, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
if(response.trim().equalsIgnoreCase("success")) {
Log.e("Remove_____________",matri_id_to);
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getContext(), error.toString(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put(KEY_MATRI_ID_BY,matri_id_by);
params.put(KEY_MATRI_ID_TO,matri_id_to);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(getContext());
requestQueue.add(stringRequest1);
}
片段
public class ShortlistTab extends Fragment {
// Session Manager Class
SessionManager session;
String email;
public String JSON_URL;
private ListView listView;
public ShortlistTab() {}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Session class instance
session = new SessionManager(getActivity());
// get user data from session
HashMap<String, String> user = session.getUserDetails();
email = user.get(SessionManager.KEY_EMAIL);
JSON_URL = "http://192.168.2.110/xp/shortlistedTab.php?matri_id="+email;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view= inflater.inflate(R.layout.matches_tab, container, false);
listView = (ListView) view.findViewById(R.id.listView);
sendRequest();
return view;
}
private void sendRequest(){
final ProgressDialog loading = ProgressDialog.show(getActivity(),"Loading Data", "Please wait...",false,false);
StringRequest stringRequest = new StringRequest(Request.Method.POST,JSON_URL,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
loading.dismiss();
Log.e("ShortlistedTab--------",response.trim());
showJSON(response);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getContext(),error.getMessage(), Toast.LENGTH_LONG).show();
}
});
int MY_SOCKET_TIMEOUT_MS = 30000;
stringRequest.setRetryPolicy(new DefaultRetryPolicy(
MY_SOCKET_TIMEOUT_MS, DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
RequestQueue requestQueue = Volley.newRequestQueue(getContext());
requestQueue.add(stringRequest);
}
protected void showJSON(String json){
ShortlistMeParseJSON pj = new ShortlistMeParseJSON(json);
pj.parseJSON();
Shortlisted_custom cl = new Shortlisted_custom(getActivity(),
ShortlistMeParseJSON.ids,ShortlistMeParseJSON.ages,
ShortlistMeParseJSON.heights,
ShortlistMeParseJSON.communities,ShortlistMeParseJSON.castes,
ShortlistMeParseJSON.educations,ShortlistMeParseJSON.occupations,
ShortlistMeParseJSON.incomes,ShortlistMeParseJSON.pics,
ShortlistMeParseJSON.locations,ShortlistMeParseJSON.status,
ShortlistMeParseJSON.expressinterest);
listView.setAdapter(cl);
}
}
的[在Android中移除的ListView項目]可能的複製（https：//開頭計算器.com/questions/2558591/remove-listview-items-in-android） –
okey這是什麼？ –
抱歉，您應該在此處提問之前嘗試搜索答案。 –