質問編集履歴

ShopFragmentの85～87行目を編集しました。

2021/12/16 11:38

投稿

Yakusugi

スコア123

title CHANGED Viewed

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body CHANGED Viewed

@@ -38,9 +38,11 @@
 ```ここに言語を入力
 package com.myproject.offlinebudgettrackerappproject;
+import android.app.Application;
 import android.os.Bundle;
 import androidx.fragment.app.Fragment;
+import androidx.lifecycle.ViewModelProvider;
 import android.util.Log;
 import android.view.LayoutInflater;
@@ -118,6 +120,9 @@
                 BudgetTracker budgetTracker;
                 String storeName = enterStoreNameForQuery.getText().toString();
+                budgetTrackerViewModel = new ViewModelProvider.AndroidViewModelFactory(ShopFragment.this
+                        .getApplication())
+                        .create(BudgetTrackerViewModel.class);
                 budgetTracker = new BudgetTracker();
                 budgetTracker.setStoreName(storeName);

元に戻しました。

2021/12/16 11:38

投稿

Yakusugi

スコア123

title CHANGED Viewed

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body CHANGED Viewed

@@ -121,7 +121,7 @@
                 budgetTracker = new BudgetTracker();
                 budgetTracker.setStoreName(storeName);
-                budgetTrackerViewModel.getStoreNameLists(budgetTracker.getStoreName());
+                budgetTrackerViewModel.getStoreNameLists(storeName);
                 Log.d("TAG", "onClick: " + enterStoreNameForQuery.getText().toString());
 //                Log.d("TAG", "onClick: " + list);
@@ -165,14 +165,14 @@
         return allBudgetTrackerLists;
     }
-    public List<BudgetTracker> getStoreNameLists(BudgetTracker budgetTracker) {
+    public List<BudgetTracker> getStoreNameLists(String storeName) {
-        storeNameLists = repository.queryStoreName(budgetTracker.getStoreName());
+        storeNameLists = repository.queryStoreName(storeName);
         return storeNameLists;
+    }
     public static void insert(BudgetTracker budgetTracker) {
         repository.insert(budgetTracker);
     }
 }
 ```

BudgetTRackerViewModelのgetStoreNameListsのgetStoreNameListsメソッドを変更

2021/12/16 11:23

投稿

Yakusugi

スコア123

title CHANGED Viewed

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body CHANGED Viewed

@@ -165,10 +165,9 @@
         return allBudgetTrackerLists;
     }
-    public List<BudgetTracker> getStoreNameLists(String storeName) {
+    public List<BudgetTracker> getStoreNameLists(BudgetTracker budgetTracker) {
-        storeNameLists = repository.queryStoreName(storeName);
+        storeNameLists = repository.queryStoreName(budgetTracker.getStoreName());
         return storeNameLists;
-    }
     public static void insert(BudgetTracker budgetTracker) {
         repository.insert(budgetTracker);

エラー内容を更新しました。

2021/12/16 08:32

投稿

Yakusugi

スコア123

title CHANGED Viewed

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body CHANGED Viewed

@@ -15,10 +15,10 @@
 エラー内容
 ```ここに言語を入力
-2021-12-13 16:21:09.013 14160-14160/com.myproject.offlinebudgettrackerappproject E/AndroidRuntime: FATAL EXCEPTION: main
+2021-12-16 16:39:45.420 30171-30171/? E/AndroidRuntime: FATAL EXCEPTION: main
-    Process: com.myproject.offlinebudgettrackerappproject, PID: 14160
+    Process: com.myproject.offlinebudgettrackerappproject, PID: 30171
     java.lang.NullPointerException: Attempt to invoke virtual method 'java.util.List com.myproject.offlinebudgettrackerappproject.model.BudgetTrackerViewModel.getStoreNameLists(java.lang.String)' on a null object reference
-        at com.myproject.offlinebudgettrackerappproject.ShopFragment$1.onClick(ShopFragment.java:81)
+        at com.myproject.offlinebudgettrackerappproject.ShopFragment$1.onClick(ShopFragment.java:86)
         at android.view.View.performClick(View.java:7259)
         at com.google.android.material.button.MaterialButton.performClick(MaterialButton.java:1119)
         at android.view.View.performClickInternal(View.java:7236)
@@ -31,6 +31,7 @@
         at java.lang.reflect.Method.invoke(Native Method)
         at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
 ```
 ShopFragment.java
@@ -51,6 +52,8 @@
 import com.myproject.offlinebudgettrackerappproject.model.BudgetTracker;
 import com.myproject.offlinebudgettrackerappproject.model.BudgetTrackerViewModel;
+import java.util.List;
 /**
  * A simple {@link Fragment} subclass.
  * Use the {@link ShopFragment#newInstance} factory method to
@@ -112,12 +115,16 @@
         storeSearchQueryBtn.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
+                BudgetTracker budgetTracker;
                 String storeName = enterStoreNameForQuery.getText().toString();
+                budgetTracker = new BudgetTracker();
+                budgetTracker.setStoreName(storeName);
-                budgetTrackerViewModel.getStoreNameLists(storeName);
+                budgetTrackerViewModel.getStoreNameLists(budgetTracker.getStoreName());
                 Log.d("TAG", "onClick: " + enterStoreNameForQuery.getText().toString());
+//                Log.d("TAG", "onClick: " + list);
             }
         });
@@ -130,102 +137,43 @@
 BudgetTrackerViewModel.java
 ```ここに言語を入力
-package com.myproject.offlinebudgettrackerappproject;
+package com.myproject.offlinebudgettrackerappproject.model;
-import android.os.Bundle;
+import android.app.Application;
-import androidx.fragment.app.Fragment;
+import androidx.annotation.NonNull;
+import androidx.lifecycle.AndroidViewModel;
+import androidx.lifecycle.LiveData;
-import android.util.Log;
-import android.view.LayoutInflater;
+import com.myproject.offlinebudgettrackerappproject.data.BudgetTrackerRepository;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.Button;
-import android.widget.EditText;
-import com.myproject.offlinebudgettrackerappproject.model.BudgetTracker;
-import com.myproject.offlinebudgettrackerappproject.model.BudgetTrackerViewModel;
 import java.util.List;
-/**
- * A simple {@link Fragment} subclass.
- * Use the {@link ShopFragment#newInstance} factory method to
- * create an instance of this fragment.
- */
-public class ShopFragment extends Fragment {
+public class BudgetTrackerViewModel extends AndroidViewModel {
+    public static BudgetTrackerRepository repository;
+    public final LiveData<List<BudgetTracker>> allBudgetTrackerLists;
-    BudgetTrackerViewModel budgetTrackerViewModel;
+    public List<BudgetTracker> storeNameLists;
-    // TODO: Rename parameter arguments, choose names that match
+    public BudgetTrackerViewModel(@NonNull Application application) {
+        super(application);
-    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
+        repository = new BudgetTrackerRepository(application);
-    private static final String ARG_PARAM1 = "param1";
+        allBudgetTrackerLists = repository.getAllBudgetTrackerData();
-    private static final String ARG_PARAM2 = "param2";
-    // TODO: Rename and change types of parameters
-    private String mParam1;
-    private String mParam2;
-    public ShopFragment() {
-        // Required empty public constructor
     }
-    /**
-     * Use this factory method to create a new instance of
-     * this fragment using the provided parameters.
-     *
-     * @param param1 Parameter 1.
-     * @param param2 Parameter 2.
-     * @return A new instance of fragment ShopFragment.
-     */
-    // TODO: Rename and change types and number of parameters
-    public static ShopFragment newInstance(String param1, String param2) {
+    public LiveData<List<BudgetTracker>> getAllBudgetTrackerLists() {
-        ShopFragment fragment = new ShopFragment();
-        Bundle args = new Bundle();
-        args.putString(ARG_PARAM1, param1);
-        args.putString(ARG_PARAM2, param2);
-        fragment.setArguments(args);
-        return fragment;
+        return allBudgetTrackerLists;
     }
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
+    public List<BudgetTracker> getStoreNameLists(String storeName) {
-        super.onCreate(savedInstanceState);
-        if (getArguments() != null) {
-            mParam1 = getArguments().getString(ARG_PARAM1);
+        storeNameLists = repository.queryStoreName(storeName);
-            mParam2 = getArguments().getString(ARG_PARAM2);
+        return storeNameLists;
-        }
     }
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container,
-                             Bundle savedInstanceState) {
-        View view = inflater.inflate(R.layout.fragment_shop, container, false);
-        EditText enterStoreNameForQuery = (EditText) view.findViewById(R.id.shop_search);
-        Button storeSearchQueryBtn = (Button) view.findViewById(R.id.btn_shop_search);
-        storeSearchQueryBtn.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
+    public static void insert(BudgetTracker budgetTracker) {
-                BudgetTracker budgetTracker;
+        repository.insert(budgetTracker);
-                String storeName = enterStoreNameForQuery.getText().toString();
-                budgetTracker = new BudgetTracker();
-                budgetTracker.setStoreName(storeName);
-                budgetTrackerViewModel.getStoreNameLists(budgetTracker.getStoreName());
-                Log.d("TAG", "onClick: " + enterStoreNameForQuery.getText().toString());
-//                Log.d("TAG", "onClick: " + list);
-            }
-        });
-        return view;
     }
 }
 ```

ShopFragmnetの82～84行目を更新しました。

2021/12/16 07:47

投稿

Yakusugi

スコア123

title CHANGED Viewed

File without changes

body CHANGED Viewed

@@ -130,42 +130,102 @@
 BudgetTrackerViewModel.java
 ```ここに言語を入力
-package com.myproject.offlinebudgettrackerappproject.model;
+package com.myproject.offlinebudgettrackerappproject;
-import android.app.Application;
+import android.os.Bundle;
-import androidx.annotation.NonNull;
+import androidx.fragment.app.Fragment;
-import androidx.lifecycle.AndroidViewModel;
-import androidx.lifecycle.LiveData;
+import android.util.Log;
-import com.myproject.offlinebudgettrackerappproject.data.BudgetTrackerRepository;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.EditText;
+import com.myproject.offlinebudgettrackerappproject.model.BudgetTracker;
+import com.myproject.offlinebudgettrackerappproject.model.BudgetTrackerViewModel;
 import java.util.List;
+/**
+ * A simple {@link Fragment} subclass.
+ * Use the {@link ShopFragment#newInstance} factory method to
+ * create an instance of this fragment.
+ */
-public class BudgetTrackerViewModel extends AndroidViewModel {
+public class ShopFragment extends Fragment {
-    public static BudgetTrackerRepository repository;
-    public final LiveData<List<BudgetTracker>> allBudgetTrackerLists;
-    public List<BudgetTracker> storeNameLists;
+    BudgetTrackerViewModel budgetTrackerViewModel;
-    public BudgetTrackerViewModel(@NonNull Application application) {
+    // TODO: Rename parameter arguments, choose names that match
-        super(application);
-        repository = new BudgetTrackerRepository(application);
+    // the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
-        allBudgetTrackerLists = repository.getAllBudgetTrackerData();
+    private static final String ARG_PARAM1 = "param1";
+    private static final String ARG_PARAM2 = "param2";
+    // TODO: Rename and change types of parameters
+    private String mParam1;
+    private String mParam2;
+    public ShopFragment() {
+        // Required empty public constructor
     }
+    /**
+     * Use this factory method to create a new instance of
+     * this fragment using the provided parameters.
+     *
+     * @param param1 Parameter 1.
+     * @param param2 Parameter 2.
+     * @return A new instance of fragment ShopFragment.
+     */
+    // TODO: Rename and change types and number of parameters
-    public LiveData<List<BudgetTracker>> getAllBudgetTrackerLists() {
+    public static ShopFragment newInstance(String param1, String param2) {
+        ShopFragment fragment = new ShopFragment();
+        Bundle args = new Bundle();
+        args.putString(ARG_PARAM1, param1);
+        args.putString(ARG_PARAM2, param2);
+        fragment.setArguments(args);
-        return allBudgetTrackerLists;
+        return fragment;
     }
+    @Override
-    public List<BudgetTracker> getStoreNameLists(String storeName) {
+    public void onCreate(Bundle savedInstanceState) {
-        storeNameLists = repository.queryStoreName;
+        super.onCreate(savedInstanceState);
-        return storeNameLists;
+        if (getArguments() != null) {
+            mParam1 = getArguments().getString(ARG_PARAM1);
+            mParam2 = getArguments().getString(ARG_PARAM2);
+        }
     }
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                             Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.fragment_shop, container, false);
+        EditText enterStoreNameForQuery = (EditText) view.findViewById(R.id.shop_search);
+        Button storeSearchQueryBtn = (Button) view.findViewById(R.id.btn_shop_search);
+        storeSearchQueryBtn.setOnClickListener(new View.OnClickListener() {
+            @Override
-    public static void insert(BudgetTracker budgetTracker) {
+            public void onClick(View view) {
-        repository.insert(budgetTracker);
+                BudgetTracker budgetTracker;
+                String storeName = enterStoreNameForQuery.getText().toString();
+                budgetTracker = new BudgetTracker();
+                budgetTracker.setStoreName(storeName);
+                budgetTrackerViewModel.getStoreNameLists(budgetTracker.getStoreName());
+                Log.d("TAG", "onClick: " + enterStoreNameForQuery.getText().toString());
+//                Log.d("TAG", "onClick: " + list);
+            }
+        });
+        return view;
     }
 }
 ```