我正在尝试使用volley将数据从mysql数据库加载到Tab布局中的片段。问题是该函数正在从DB获取数据,但没有将其加载到片段中。
当我试图在列表中添加硬编码的数据时,它起作用了,数据被加载到片段中。但这不适用于截击。请帮帮忙
以下是我的片段代码:
public class DriverFragment extends Fragment {
View v;
private RecyclerView mRecyclerView;
Context ctx;
private static final String URL_PRODUCTS = "http://192.168.10.11/AutoBus/show_driver.php";
List<DriverModel> mData;
public DriverFragment() {
}
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
v = inflater.inflate(R.layout.driver_frgment, container, false);
mRecyclerView = (RecyclerView) v.findViewById(R.id.mon_data);
DriverAdapter recyclerViewAdapter = new DriverAdapter(getContext(),mData);
mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
mRecyclerView.setAdapter(recyclerViewAdapter);
return v;
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mData = new ArrayList<>();
/*mData.add(new DriverModel("Asad","092 4587455","Asss","ssss","dddddd"));
mData.add(new DriverModel("Asad","092 4587455","Asss","ssss","dddddd"));
mData.add(new DriverModel("Asad","092 4587455","Asss","ssss","dddddd"));
mData.add(new DriverModel("Asad","092 4587455","Asss","ssss","dddddd"));
*/
loadDetails();
}
private void loadDetails() {
/*
* Creating a String Request
* The request type is GET defined by first parameter
* The URL is defined in the second parameter
* Then we have a Response Listener and a Error Listener
* In response listener we will get the JSON response as a String
* */
StringRequest stringRequest = new StringRequest(Request.Method.GET, URL_PRODUCTS,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
try {
//converting the string to json array object
JSONArray array = new JSONArray(response);
//traversing through all the object
for (int i = 0; i < array.length(); i++) {
//getting product object from json array
JSONObject data = array.getJSONObject(i);
//adding the product to product list
mData.add(new DriverModel(
data.getString("bus_number"),
data.getString("driver_uname"),
data.getString("driver_password"),
data.getString("driver_id"),
data.getString("driver_phone")
));
Toast.makeText(getActivity(), ""+data, Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getActivity(), "Error" + e.toString(), Toast.LENGTH_SHORT).show();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getActivity(), "Error" + error.toString(), Toast.LENGTH_SHORT).show();
}
});
//adding our stringrequest to queue
Volley.newRequestQueue(Objects.requireNonNull(getActivity())).add(stringRequest);
}
}
发布于 2019-06-08 22:25:58
在列表上设置数据后,在volley请求的onResponse(String response)方法内调用适配器类的notifyDataSetChanged()方法
// make global object DriverAdapter class
DriverAdapter recyclerViewAdapter;
for (int i = 0; i < array.length(); i++) {
//getting product object from json array
JSONObject data = array.getJSONObject(i);
//adding the product to product list
mData.add(new DriverModel(data.getString("bus_number"),
data.getString("driver_uname"),
data.getString("driver_password"),
data.getString("driver_id"),
data.getString("driver_phone")));
Toast.makeText(getActivity(), ""+data, Toast.LENGTH_LONG).show();
}
//after set data on list,call here notifiyDataSetChanged() method
recyclerViewAdapter.notifyDataSetChanged();
发布于 2019-12-20 22:40:16
package com.sbtcc.zimcon;
import android.content.Context;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.Toast;
import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import com.sbtcc.zimcon.ui.main.Product;
import com.sbtcc.zimcon.ui.main.VendorcustomListAdapter;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
/**
* A simple {@link Fragment} subclass.
*/
public class VendorsFragment extends Fragment {
private View VendorsProView;
private String URL_GET_USERPRODUCT = "http://192.168.1.6/ZimCon/IndividualSell/GetAllProducts.php";
private View PrivateUserProductsView;
private ArrayList<Product> arrayList;
private ListView lv;
private String URL_GET_USERPRODUCTS = "http://192.168.1.6/ZimCon/IndividualSell/GetMyProducts.php";
private SessionManager sessionManager;
private String UseId = "2";
Context context;
public VendorsFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
VendorsProView = inflater.inflate(R.layout.fragment_vendors, container, false);
arrayList = new ArrayList<>();
lv = VendorsProView.findViewById(R.id.Listview);
return VendorsProView;
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
GetProductFromServer();
}
private void GetProductFromServer() {
final String UserId = UseId;
StringRequest stringRequest = new StringRequest(Request.Method.POST, URL_GET_USERPRODUCT,
new Response.Listener<String>() {
@Override
public void onResponse(String responseMyProductsPHP) {
try {
JSONObject jsonObject = new JSONObject(responseMyProductsPHP);
String Success = jsonObject.getString("success");
JSONArray jsonArray = jsonObject.getJSONArray("products");
if (Success.equals("1")){
for (int i = 0; i < jsonArray.length(); i++){
JSONObject object = jsonArray.getJSONObject(i);
String id = object.getString("Product_Id");
String image = object.getString("Product_img_link");
String name = object.getString("Name");
String prize = object.getString("Prize");
String qty = object.getString("Qty");
String sold = object.getString("Sold");
String strName = name;
String strPrice = prize;
String strQty = qty;
String vendorId = "9";
arrayList.add(new Product(id, strName, image, strPrice, strQty, vendorId));
}
}
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getActivity(),"Error Json: "+e.toString(),Toast.LENGTH_SHORT).show();
}
VendorcustomListAdapter userCustomProductListAdapter = new VendorcustomListAdapter(
getContext(), R.layout.vendor_custom_product_listview, arrayList
);
lv.setAdapter(userCustomProductListAdapter);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Toast.makeText(getActivity(),"Error resp : "+error.toString(),Toast.LENGTH_SHORT).show();
}
}){
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
params.put("id", UserId);
return params;
}
};
RequestQueue queue = Volley.newRequestQueue(getActivity().getApplicationContext());
queue.add(stringRequest);
}
}
https://stackoverflow.com/questions/56506182
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