diff --git a/app/src/main/java/com/example/nemophila/MyPageActivity.java b/app/src/main/java/com/example/nemophila/MyPageActivity.java
index 502a50b..f90011a 100644
--- a/app/src/main/java/com/example/nemophila/MyPageActivity.java
+++ b/app/src/main/java/com/example/nemophila/MyPageActivity.java
@@ -1,5 +1,6 @@
 package com.example.nemophila;
 
+import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.lifecycle.Observer;
 import androidx.lifecycle.ViewModelProvider;
@@ -99,22 +100,22 @@
             }
         });
 
-        /* ここからあんまわかっていない */
         RecyclerView rv = findViewById(R.id.postsList);
         LinearLayoutManager llm = new LinearLayoutManager(this);
         List<MyPageActDataModel> myPageActDataset = new ArrayList<>();
         MyPageActAdapter adapter = new MyPageActAdapter(myPageActDataset) {
+            // 「（投稿）削除」ボタンを押した後、「Yes」を押すと対象の投稿を削除する
             @Override
             void onDeleteButtonClick(View view, int position, MyPageActDataModel dataModel) {
                 new AlertDialog.Builder(MyPageActivity.this)
                         .setTitle("警告")
-                        .setMessage("この投稿を削除しますか？")
+                        .setMessage("この投稿を削除しますか？\n削除すると元に戻せなくなります！")
                         .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                             @Override
                             public void onClick(DialogInterface dialogInterface, int i) {
-                                Toast.makeText(MyPageActivity.this, dataModel.getPid(), Toast.LENGTH_SHORT).show();
+                                Toast.makeText(MyPageActivity.this, "投稿を削除しました。", Toast.LENGTH_SHORT).show();
                                 System.out.println("投稿を削除しました。");
-//                                accountViewModel.deleteAccountPost(dataModel.getSid(), uid, dataModel.getPid(), token);
+                                accountViewModel.deleteAccountPost(uid, dataModel.getPid(), token);
                             }
                         })
                         .setNegativeButton("No", null)
@@ -127,6 +128,7 @@
         rv.setLayoutManager(llm);
         rv.setAdapter(adapter);
 
+        // getAccountPostsLiveDataとの通信により今までにユーザーがしている投稿を表示する
         accountViewModel.getAccountPosts(uid);
         accountViewModel.getAccountPostsLiveData().observe(this, new Observer <Collection<Post>>() {
             @Override
@@ -149,6 +151,7 @@
                     data.setRate(strRate);
                     data.setGenre(post.getGenre());
                     data.setComment(post.getComment());
+                    data.setPid(post.getPid());
                     myPageActDataset.add(data);
                 }
 
@@ -168,7 +171,7 @@
         public MyPageActAdapter(List<MyPageActDataModel> list) { this.list = list; }
 
         @Override
-        public MyPageActViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+        public MyPageActViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
             View inflate = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_my_page_activity_posts, parent,false);
             MyPageActViewHolder vh = new MyPageActViewHolder(inflate);
 
@@ -184,7 +187,7 @@
         }
 
         @Override
-        public void onBindViewHolder(MyPageActViewHolder holder, int position) {
+        public void onBindViewHolder(@NonNull MyPageActViewHolder holder, int position) {
             holder.dateView.setText(list.get(position).getDate());
             holder.rateView.setText(list.get(position).getRate());
             holder.genreView.setText(list.get(position).getGenre());
@@ -205,7 +208,7 @@
         public TextView commentView;
         public ImageButton deleteButton;
 
-        public MyPageActViewHolder(View view) {
+        public MyPageActViewHolder(@NonNull View view) {
             super(view);
             dateView = (TextView) view.findViewById(R.id.date);
             rateView = (TextView) view.findViewById(R.id.rate);
@@ -216,12 +219,11 @@
     }
 
     // DataModel
-    public class MyPageActDataModel {
+    public static class MyPageActDataModel {
         private String date;
         private String rate;
         private String genre;
         private String comment;
-        private String sid;
         private String pid;
 
         public String getDate() {
@@ -252,9 +254,6 @@
             this.comment = comment;
         }
 
-        public String getSid() { return sid; }
-        public void setSid(String sid) { this.sid = sid; }
-
         public String getPid() { return pid; }
         public void setPid(String sid) { this.pid = pid; }
     }