我从json响应中获取数据并在listView中显示。当我删除listView中的项目时，它会被成功删除，但listView不会刷新。
我使用的是ArrayAdapter而不是BaseAdapter。
CustomList.java
public class CustomList extends ArrayAdapter<String> {
ImageButton imgdelete;
private String[] clientid;
private String[] mobile;
private String[] grand;
private String[] billid;
View listViewItem;
TextView textViewname;
private Activity context;
public CustomList(Activity context, String[] clientid, String[] mobile, String[] grand, String[] billid) {
super(context, R.layout.activity_listview, clientid);
this.context = context;
this.clientid = clientid;
this.mobile = mobile;
this.grand = grand;
this.billid = billid;
}
@Override
public View getView(final int position, final View convertView, ViewGroup parent) {
final LayoutInflater inflater = context.getLayoutInflater();
listViewItem = inflater.inflate(R.layout.activity_listview, null, true);
textViewname = (TextView) listViewItem.findViewById(R.id.viewClientMobile);
TextView textViewmobile = (TextView) listViewItem.findViewById(R.id.viewClientName);
TextView textViewgrand = (TextView) listViewItem.findViewById(R.id.viewCompnayName);
TextView textViewbillid = (TextView) listViewItem.findViewById(R.id.viewCompanyEmail);
ImageButton imgedit = (ImageButton)listViewItem.findViewById(R.id.imgeditbtn);
imgdelete = (ImageButton)listViewItem.findViewById(R.id.imgdeletebtn);
textViewname.setText(clientid[position]);
textViewmobile.setText(mobile[position]);
textViewgrand.setText(grand[position]);
textViewbillid.setText(billid[position]);
imgdelete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
new AlertDialog.Builder(context)
.setTitle("Delete entry")
.setMessage("Are you sure you want to delete this entry?")
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// continue with delete
DeleteClient_api();
}
})
.setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// do nothing
}
})
.setIcon(android.R.drawable.ic_dialog_alert)
.show();
notifyDataSetChanged();
}
});
return listViewItem;
}
protected void DeleteClient_api() {
final StringRequest stringRequest = new StringRequest(Request.Method.POST, "http://befoodie.co/billingsystem/client_api.php",
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
// Toast.makeText(getContext(), response, Toast.LENGTH_LONG).show();
}
},
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>();
// final String session = ActivityLogin.MostSecureRandom.nextSessionId();
params.put("Action", "RemoveClient");
params.put("ClientID",textViewname.getText().toString());
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(getContext());
requestQueue.add(stringRequest);
}
}
ViewAllClient.java
public class ViewAllClient extends Fragment {
private ListView listView;
//create Array of product Details
public ViewAllClient() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.activity_view_all_client, container, false);
// listView = (ListView) rootView.findViewById(R.id.listviewclient);
listView = (ListView) rootView.findViewById(R.id.listviewclient);
View_api();
return rootView;
}
protected void View_api(){
final StringRequest stringRequest = new StringRequest(Request.Method.POST, "http://befoodie.co/billingsystem/client_api.php",
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
showJSON(response); //Toast.makeText(getActivity(), response, Toast.LENGTH_LONG).show();
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getActivity(), error.toString(), Toast.LENGTH_LONG).show();
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
// final String session = ActivityLogin.MostSecureRandom.nextSessionId();
params.put("Action", "ViewClients");
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(getActivity());
requestQueue.add(stringRequest);
}
protected void showJSON(String json){
ParseJSON pj = new ParseJSON(json);
pj.parseJSON();
final CustomList cl = new CustomList(getActivity(), ParseJSON.CLIENTID,ParseJSON.mobile,ParseJSON.grand, ParseJSON.billid);
listView.setAdapter(cl);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
}
});
}
}
ParseJSON.java
public class ParseJSON {
public static String[] CLIENTID;
public static String[] mobile;
public static String[] grand;
public static String[] billid;
public static final String JSON_ARRAY = "ClientDetails";
public static final String KEY_ID = "ClientID";
public static final String KEY_MOBILE = "ClientName";
public static final String KEY_GRAND = "EmailID";
public static final String KEY_BILL = "StartingCommunicationDate";
private JSONArray users = null;
private String json;
public ParseJSON(String json){
this.json = json;
}
protected void parseJSON(){
JSONObject jsonObject=null;
try {
jsonObject = new JSONObject(json);
users = jsonObject.getJSONArray(JSON_ARRAY);
CLIENTID = new String[users.length()];
mobile = new String[users.length()];
grand = new String[users.length()];
billid = new String[users.length()];
for(int i=0;i<users.length();i++){
JSONObject jo = users.getJSONObject(i);
CLIENTID[i] = jo.getString(KEY_ID);
mobile[i] = jo.getString(KEY_MOBILE);
grand[i] = jo.getString(KEY_GRAND);
billid[i] = jo.getString(KEY_BILL);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
答案 0 :(得分：0)
尝试以下代码，
YourAdapter adapter = new YourAdapter(context, ListDataHeader, ListDataChild, data);
adapter.notifyDataSetChanged();
答案 1 :(得分：0)
嗨@Dipu首先，您必须从本地jsonresponse（填充列表）中删除该项目。之后您必须通知适配器数据已更改。如果您从适配器内部删除，只需编写{删除项目后{1}} 如果要从课程中删除，则必须简单地写
notifyDataSetChanged();我希望它有所帮助
答案 2 :(得分：0)
// in ViewAllClient fragment
public void delete(int position){
adapter.notifyItemChanged(position);//-- only update the required row
// notifyDataSetChanged for full listview
}
// in adapter
ViewAllClient viewAllClient =new ViewAllClient();
viewAllClient .delete(position);