diff --git a/app/src/main/java/com/example/citrusclient/views/CreateBookFragment.java b/app/src/main/java/com/example/citrusclient/views/CreateBookFragment.java
index 9d11a24..1984939 100644
--- a/app/src/main/java/com/example/citrusclient/views/CreateBookFragment.java
+++ b/app/src/main/java/com/example/citrusclient/views/CreateBookFragment.java
@@ -5,6 +5,7 @@
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
 import androidx.fragment.app.Fragment;
 
 import android.view.LayoutInflater;
@@ -13,6 +14,10 @@
 import android.widget.Button;
 
 import com.example.citrusclient.R;
+import android.graphics.Color;//ボタンの色変更
+import android.os.Bundle;
+import android.widget.Button;
+
 
 /**
  * A simple {@link Fragment} subclass.
@@ -71,15 +76,26 @@
 
     @Override
     public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
-        super.onViewCreated(view, savedInstanceState);
+        super.onViewCreated(view, savedInstanceState); //親クラスである Fragment の onViewCreated() メソッドを呼び出す
 
-        //View.findViewById(R.id.cancel_button).setOnClickListener(new View.OnClickListener())
-        Button saveButton = (Button)view.findViewById(R.id.save_button);
-//        saveButton.setOnClickListener(new View.OnClickListener(){
-//            public void onClick(View v){
-//                Intent intent = Intent(CreateBookFragment.this,MainActivity.class);
-//                startActivity(intent);
-//            }
-//        })
+        //ここから書く
+        // MainActivityにこのフラグメントを設定するした二つのどっちか
+        //((MainActivity) getContext()).setCreateBookFragment(this);//フラグメントとアクティビティ間での情報のやり取りがあるとき
+        //((MainActivity) getActivity()).showFragment(new MyBookshelfFragment());
+
+        view.findViewById(R.id.save_button).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                ((MainActivity) getActivity()).showFragment(new MyBookshelfFragment());
+            }
+        });
+
+        view.findViewById(R.id.cancel_button).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                ((MainActivity) getActivity()).showFragment(new MyBookshelfFragment());
+            }
+        });
+
     }
 }
\ No newline at end of file