Android Fragments 无法在片段活动上删除和创建数据[已关闭]

chhkpiq4  于 2024-01-08  发布在  Android
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我试图从一个API网页删除和创建一个数据字符串，但我不能得到错误代码我从原生PHP创建API网站，但我创建的数据 Postman 工作插入和删除数据。
代码删除数据

  1. package com.dev.kedaiit.sibooks.ui.kategori;
  3. import android.app.ProgressDialog;
  4. import android.content.Intent;
  5. import android.os.Bundle;
  6. import android.util.Log;
  7. import android.view.View;
  8. import android.widget.Button;
  9. import android.widget.EditText;
  10. import android.widget.Toast;
  12. import androidx.appcompat.app.AppCompatActivity;
  14. import com.android.volley.AuthFailureError;
  15. import com.android.volley.Request;
  16. import com.android.volley.Response;
  17. import com.android.volley.VolleyError;
  18. import com.android.volley.toolbox.StringRequest;
  19. import com.dev.kedaiit.sibooks.MainActivity;
  20. import com.dev.kedaiit.sibooks.R;
  21. import com.dev.kedaiit.sibooks.util.AppController;
  22. import com.dev.kedaiit.sibooks.util.ServerAPI;
  24. import org.json.JSONException;
  25. import org.json.JSONObject;
  27. import java.util.HashMap;
  28. import java.util.Map;
  30. public class DeleteKategori extends AppCompatActivity {
  31.     EditText deleteID ;
  32.     Button btnDelete;
  33.     ProgressDialog pd;
  35.     @Override
  36.     protected void onCreate(Bundle savedInstanceState) {
  37.         super.onCreate(savedInstanceState);
  38.         setContentView(R.layout.activity_delete_kategori);
  40.         deleteID = (EditText) findViewById(R.id.id_kategori);
  41.         btnDelete = (Button) findViewById(R.id.btn_delete);
  42.         pd = new ProgressDialog(DeleteKategori.this);
  44.         btnDelete.setOnClickListener(new View.OnClickListener() {
  45.             @Override
  46.             public void onClick(View view) {
  47.                 deleteData();
  48.             }
  49.         });
  50.     }
  52.     private void deleteData()
  53.     {
  54.         pd.setMessage("Delete Data ...");
  55.         pd.setCancelable(true);
  56.         pd.show();
  58.         StringRequest delReq = new StringRequest(Request.Method.POST, ServerAPI.URL_DELETE_KATEGORI, new Response.Listener<String>() {
  59.                     @Override
  60.                     public void onResponse(String response) {
  61.                         pd.cancel();
  62.                         Log.d("volley","response : " + response.toString());
  63.                         try {
  64.                             JSONObject res = new JSONObject(response);
  65.                             Toast.makeText(DeleteKategori.this,"Successs" +res.getString("message"), Toast.LENGTH_SHORT).show();
  67.                         } catch (JSONException e) {
  68.                             e.printStackTrace();
  69.                         }
  71.                         startActivity(new Intent(DeleteKategori.this, KategoriFragment.class));
  72.                     }
  73.                 },
  74.                 new Response.ErrorListener() {
  75.                     @Override
  76.                     public void onErrorResponse(VolleyError error) {
  77.                         pd.cancel();
  78.                         Log.d("volley", "error : " + error.getMessage());
  79.                         Toast.makeText(DeleteKategori.this, "ERROR DELETE DATA", Toast.LENGTH_SHORT).show();
  80.                     }
  81.                 }){
  82.             @Override
  83.             protected Map<String, String> getParams() throws AuthFailureError {
  84.                 Map<String, String> map = new HashMap<>();
  85.                 map.put("id_kategori",deleteID.getText().toString());
  86.                 return map;
  87.             }
  88.         };
  90.         AppController.getInstance().addToRequestQueue(delReq);
  91.     }
  92. }

字符串
代码插入数据

  1. package com.dev.kedaiit.sibooks.ui.kategori;
  3. import android.app.ProgressDialog;
  4. import android.content.Intent;
  5. import android.os.Bundle;
  6. import android.view.View;
  7. import android.widget.Button;
  8. import android.widget.EditText;
  9. import android.widget.Toast;
  11. import androidx.appcompat.app.AppCompatActivity;
  13. import com.android.volley.AuthFailureError;
  14. import com.android.volley.Request;
  15. import com.android.volley.Response;
  16. import com.android.volley.VolleyError;
  17. import com.android.volley.toolbox.StringRequest;
  18. import com.dev.kedaiit.sibooks.R;
  19. import com.dev.kedaiit.sibooks.util.AppController;
  20. import com.dev.kedaiit.sibooks.util.ServerAPI;
  22. import org.json.JSONException;
  23. import org.json.JSONObject;
  25. import java.util.HashMap;
  26. import java.util.Map;
  28. public class InsertKategori extends AppCompatActivity {
  29.     EditText id_kategori, kategori;
  30.     Button btnBatal, btnSimpan;
  31.     ProgressDialog pd;
  33.     @Override
  34.     protected void onCreate(Bundle savedInstanceState) {
  35.         super.onCreate(savedInstanceState);
  36.         setContentView(R.layout.activity_insert_kategori);
  38.         /*get data from intent*/
  39.         Intent data = getIntent();
  40.         final int update = data.getIntExtra("update",0);
  41.         String intent_idkategori = data.getStringExtra("id_kategori");
  42.         String intent_kategori = data.getStringExtra("kategori");
  43.         /*end get data from intent*/
  45. //        id_kategori = (EditText) findViewById(R.id.idkategori);
  46.         kategori = (EditText) findViewById(R.id.edt_kategori);
  47.         btnBatal = (Button) findViewById(R.id.btn_cancel);
  48.         btnSimpan = (Button) findViewById(R.id.btn_simpan);
  49.         pd = new ProgressDialog(InsertKategori.this);
  51.         /*kondisi update / insert*/
  52.         if(update == 1)
  53.         {
  54.             btnSimpan.setText("Update Data");
  55.             id_kategori.setText(intent_idkategori);
  56.             id_kategori.setVisibility(View.VISIBLE);
  57.             kategori.setText(intent_kategori);
  59.         }
  61.         btnSimpan.setOnClickListener(new View.OnClickListener() {
  62.             @Override
  63.             public void onClick(View view) {
  64.                 if(update == 1)
  65.                 {
  66.                     Update_data();
  67.                 }else {
  68.                     simpanData();
  69.                 }
  70.             }
  71.         });
  73.         btnBatal.setOnClickListener(new View.OnClickListener() {
  74.             @Override
  75.             public void onClick(View view) {
  76.                 Intent main = new Intent(InsertKategori.this,KategoriFragment.class);
  77.                 startActivity(main);
  78.             }
  79.         });
  80.     }
  82.     private void Update_data()
  83.     {
  84.         pd.setMessage("Update Data");
  85.         pd.setCancelable(true);
  86.         pd.show();
  88.         StringRequest updateReq = new StringRequest(Request.Method.POST, ServerAPI.URL_UPDATE_KATEGORI,
  89.                 new Response.Listener<String>() {
  90.                     @Override
  91.                     public void onResponse(String response) {
  92.                         pd.cancel();
  93.                         try {
  94.                             JSONObject res = new JSONObject(response);
  95.                             Toast.makeText(InsertKategori.this, ""+   res.getString("message") , Toast.LENGTH_SHORT).show();
  96.                         } catch (JSONException e) {
  97.                             e.printStackTrace();
  98.                         }
  100.                         startActivity( new Intent(InsertKategori.this,KategoriFragment.class));
  101.                     }
  102.                 },
  103.                 new Response.ErrorListener() {
  104.                     @Override
  105.                     public void onErrorResponse(VolleyError error) {
  106.                         pd.cancel();
  107.                         Toast.makeText(InsertKategori.this, "Gagal Insert Data", Toast.LENGTH_SHORT).show();
  108.                     }
  109.                 }){
  110.             @Override
  111.             protected Map<String, String> getParams() throws AuthFailureError {
  112.                 Map<String,String> map = new HashMap<>();
  113.                 map.put("id_kategori",id_kategori.getText().toString());
  114.                 map.put("kategori",kategori.getText().toString());
  116.                 return map;
  117.             }
  118.         };
  120.         AppController.getInstance().addToRequestQueue(updateReq);
  121.     }
  124.     private void simpanData()
  125.     {
  127.         pd.setMessage("Menyimpan Data");
  128.         pd.setCancelable(true);
  129.         pd.show();
  131.         StringRequest sendData = new StringRequest(Request.Method.POST, ServerAPI.URL_INSERT_KATEGORI,
  132.                 new Response.Listener<String>() {
  133.                     @Override
  134.                     public void onResponse(String response) {
  135.                         pd.cancel();
  136.                         try {
  137.                             JSONObject res = new JSONObject(response);
  138.                             Toast.makeText(InsertKategori.this, ""+   res.getString("message") , Toast.LENGTH_SHORT).show();
  139.                         } catch (JSONException e) {
  140.                             e.printStackTrace();
  141.                         }
  143.                         startActivity( new Intent(InsertKategori.this,KategoriFragment.class));
  144.                     }
  145.                 },
  146.                 new Response.ErrorListener() {
  147.                     @Override
  148.                     public void onErrorResponse(VolleyError error) {
  149.                         pd.cancel();
  150.                         Toast.makeText(InsertKategori.this, "Gagal Insert Data", Toast.LENGTH_SHORT).show();
  151.                     }
  152.                 }){
  153.             @Override
  154.             protected Map<String, String> getParams() throws AuthFailureError {
  155.                 Map<String,String> map = new HashMap<>();
  156.                 map.put("id_kategori",id_kategori.getText().toString());
  157.                 map.put("kategori",kategori.getText().toString());
  158.                 return map;
  159.             }
  160.         };
  162.         AppController.getInstance().addToRequestQueue(sendData);
  163.     }
  165. }

型
片段Kategori

  1. package com.dev.kedaiit.sibooks.ui.kategori;
  3. import android.app.ProgressDialog;
  4. import android.content.Intent;
  5. import android.os.Bundle;
  6. import android.util.Log;
  7. import android.view.LayoutInflater;
  8. import android.view.View;
  9. import android.view.ViewGroup;
  11. import androidx.fragment.app.Fragment;
  12. import androidx.recyclerview.widget.DividerItemDecoration;
  13. import androidx.recyclerview.widget.LinearLayoutManager;
  14. import androidx.recyclerview.widget.RecyclerView;
  16. import com.android.volley.Request;
  17. import com.android.volley.RequestQueue;
  18. import com.android.volley.Response;
  19. import com.android.volley.VolleyError;
  20. import com.android.volley.toolbox.JsonObjectRequest;
  21. import com.android.volley.toolbox.Volley;
  22. import com.dev.kedaiit.sibooks.R;
  23. import com.dev.kedaiit.sibooks.adapter.AdapterDataKategori;
  24. import com.dev.kedaiit.sibooks.model.DataKategori;
  25. import com.dev.kedaiit.sibooks.util.ServerAPI;
  26. import com.google.android.material.floatingactionbutton.FloatingActionButton;
  28. import org.json.JSONArray;
  29. import org.json.JSONException;
  30. import org.json.JSONObject;
  32. import java.util.ArrayList;
  33. import java.util.List;
  35. public class KategoriFragment extends Fragment {
  36.     private RecyclerView recyclerView;
  37.     private FloatingActionButton floatingActionButton;
  38.     private LinearLayoutManager linearLayoutManager;
  39.     private DividerItemDecoration dividerItemDecoration;
  40.     private List<DataKategori> list;
  41.     private RecyclerView.Adapter adapter;
  43.     public KategoriFragment() {
  44.         // Required empty public constructor
  45.     }
  47.     @Override
  48.     public View onCreateView(final LayoutInflater inflater, final ViewGroup container, Bundle savedInstanceState) {
  50.         final View view = inflater.inflate(R.layout.fragment_kategori, container, false);
  52.         recyclerView = view.findViewById(R.id.recyclerViewKategori);
  54.         list = new ArrayList<DataKategori>();
  55.         adapter = new AdapterDataKategori(getContext(), list);
  57.         linearLayoutManager = new LinearLayoutManager(getContext());
  58.         linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
  59.         dividerItemDecoration = new DividerItemDecoration(recyclerView.getContext(), linearLayoutManager.getOrientation());
  61.         recyclerView.setHasFixedSize(true);
  62.         recyclerView.setLayoutManager(linearLayoutManager);
  63.         recyclerView.addItemDecoration(dividerItemDecoration);
  64.         recyclerView.setAdapter(adapter);
  66.         FloatingActionButton fab = (FloatingActionButton) view.findViewById(R.id.fab);
  67.         FloatingActionButton delKtg = (FloatingActionButton) view.findViewById(R.id.delKtg);
  69.         fab.setOnClickListener(new View.OnClickListener() {
  70.             @Override
  71.             public void onClick(View view) {
  72.                 Intent intent = new Intent(view.getContext(), InsertKategori.class);
  73.                 startActivity(intent);
  74.             }
  75.         });
  77.         delKtg.setOnClickListener(new View.OnClickListener() {
  78.             @Override
  79.             public void onClick(View view) {
  80.                 Intent intent = new Intent(view.getContext(),DeleteKategori.class);
  81.                 startActivity(intent);
  82.             }
  83.         });
  85.         getData();
  87.         return view;
  88.     }
  90.     private void getData() {
  91.         final ProgressDialog progressDialog = new ProgressDialog(getContext());
  92.         progressDialog.setMessage("Loading...");
  93.         progressDialog.show();
  95.         JsonObjectRequest my_request = new JsonObjectRequest(Request.Method.GET, ServerAPI.URL_DATA_KATEGORI, null, new Response.Listener<JSONObject>() {
  96.             @Override
  97.             public void onResponse(JSONObject response) {
  98.                 try{
  99.                     JSONArray jsonArray = response.getJSONArray("data");
  100.                     for (int i = 0; i < jsonArray.length(); i++) {
  102.                         JSONObject Jobj = jsonArray.getJSONObject(i);
  104.                         DataKategori obj = new DataKategori();
  105.                         obj.setId_kategori(Jobj.getString("id_kategori"));
  106.                         obj.setKategori(Jobj.getString("kategori"));
  108.                         list.add(obj);
  110.                     }
  111.                 } catch (JSONException e) {
  112.                     e.printStackTrace();
  113.                     progressDialog.dismiss();
  114.                 }
  115.                 adapter.notifyDataSetChanged();
  116.                 progressDialog.dismiss();
  117.             }
  118.         }, new Response.ErrorListener() {
  120.             @Override
  121.             public void onErrorResponse(VolleyError error) {
  122.                 Log.e("Volley", "Error: " + error.getMessage());
  123.                 progressDialog.dismiss();
  124.             }
  125.         });
  127.         RequestQueue requestQueue = Volley.newRequestQueue(getContext());
  128.         requestQueue.add(my_request);
  129.     }
  130. }

型
https://github.com/bellabeen/sibooks-client这个项目我在logcat中得到这个，当我没有得到错误代码。

android-fragments

1条答案

按热度按时间
kqqjbcuj

kqqjbcuj1#

你的代码几乎是好的。你只是错过了一件事。你没有初始化VolleyRequest。在simponData和UpdateData方法中，在底部写这一行。

  1. RequestQueue requestQueue = Volley.newRequestQueue(getContext());
  2. requestQueue.add(my_request);

字符串
而不是AppController.getInstance（）.addToRequestQueue（updateReq）。另一件事是，当收到响应时，您正在调用Intent中的片段。您应该在成功接收结果时调用onbackPress（）。

  1. new Response.Listener<String>() {
  2.                 @Override
  3.                 public void onResponse(String response) {
  4.                     pd.cancel();
  5.                     try {
  6.                         JSONObject res = new JSONObject(response);
  7.                         Toast.makeText(InsertKategori.this, ""+   res.getString("message") , Toast.LENGTH_SHORT).show();
  8.                     } catch (JSONException e) {
  9.                         e.printStackTrace();
  10.                     }
  11.                     onBackPressed();
  12.                 }
  13.             },

型
它会还原之前的片段，为了在收到成功响应时更新KategoriFragment视图，可以在onResume（）方法中调用getData（）方法，而不是oncreate（），只要片段可见，它就会调用此方法

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