diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 1719529..1a4e8be 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -44,6 +44,7 @@
     implementation(libs.retrofit2.retrofit)
     implementation(libs.converter.jackson)
     implementation(libs.navigation.runtime.android)
+    implementation (libs.material.v1100)
     testImplementation(libs.junit)
     androidTestImplementation(libs.ext.junit)
     androidTestImplementation(libs.espresso.core)
diff --git a/app/src/main/java/com/example/tampopo_client/views/MainActivity.java b/app/src/main/java/com/example/tampopo_client/views/MainActivity.java
index c253be2..21e3aae 100644
--- a/app/src/main/java/com/example/tampopo_client/views/MainActivity.java
+++ b/app/src/main/java/com/example/tampopo_client/views/MainActivity.java
@@ -1,12 +1,20 @@
 package com.example.tampopo_client.views;
 
 import android.content.Intent;
+import android.graphics.Color;
 import android.os.Bundle;
 import android.view.View;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.ArrayAdapter;
 import android.widget.Button;
+import android.widget.EditText;
+import android.widget.GridView;
 import android.widget.ImageButton;
+import android.widget.LinearLayout;
+import android.widget.TextView;
 
 import androidx.activity.EdgeToEdge;
+import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.core.graphics.Insets;
 import androidx.core.view.ViewCompat;
@@ -16,6 +24,14 @@
 
 public class MainActivity extends AppCompatActivity {
 
+    private EditText editMessage;
+    private ImageButton sendButton;
+    private GridView wordGroup;
+    private LinearLayout messageList;
+    //アクティビティの選択肢
+    private String[] words = {"ひまnow","あそぼ！","そろそろ会いたない〜？", "勉強なう", "電話しよ～", "お風呂入ってくる～","今暇だよー！","いそがしい～!!"};
+    private Button openDialogButton;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -54,5 +70,78 @@
 //            }
 //        });
 
+        messageList = findViewById(R.id.messageList);
+
+        // ボタンを押すとダイアログ表示（トリガー用）
+        openDialogButton = findViewById(R.id.openDialogButton);
+        openDialogButton.setOnClickListener(v -> showInputDialog());
+
+    }
+    private void showInputDialog() {
+        // カスタムビュー読み込み
+        View dialogView = getLayoutInflater().inflate(R.layout.main_dialog, null);
+        EditText editTextInput = dialogView.findViewById(R.id.editTextInput);
+        GridView wordGrid = dialogView.findViewById(R.id.wordGrid);
+        ImageButton sendButton = dialogView.findViewById(R.id.sendButton);
+
+        // 語群セット
+        ArrayAdapter<String> adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, words);
+        wordGrid.setAdapter(adapter);
+
+        // 語群クリックで入力欄にセット
+        wordGrid.setOnItemClickListener((parent, view, position, id) -> {
+            editTextInput.setText(words[position]);
+            // 入力欄にフォーカス＆キーボード表示
+            editTextInput.requestFocus();
+            InputMethodManager imm = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
+            imm.showSoftInput(editTextInput, InputMethodManager.SHOW_IMPLICIT);
+        });
+
+        // ダイアログ生成
+        AlertDialog dialog = new AlertDialog.Builder(this)
+                .setView(dialogView)
+                .create();
+
+        // 送信ボタン処理
+        sendButton.setOnClickListener(v -> {
+            String message = editTextInput.getText().toString().trim();
+            int length = message.length();
+            if (!message.isEmpty()) {
+                if(length > 20){
+                    openDialogButton.setTextSize(7);
+                }else if(length > 10){
+                    openDialogButton.setTextSize(10);
+                }else{
+                    openDialogButton.setTextSize(12);
+                }
+                openDialogButton.setMaxLines(10);
+                openDialogButton.setLineSpacing(4.0f,1.2f);
+                openDialogButton.setText(message);
+                editTextInput.setText("");
+                dialog.dismiss(); // ダイアログを閉じる
+            }else{
+                openDialogButton.setText("");
+            }
+        });
+
+        dialog.show();
+    }
+
+    private void addMessageToHome(String message) {
+        TextView textView = new TextView(this);
+        textView.setText(message);
+        textView.setPadding(10, 10, 10, 10);
+        textView.setBackgroundColor(Color.parseColor("#E0E0E0"));
+        int length = message.length();
+        if(length > 10){
+            textView.setTextSize(5);
+        }else if(length > 7){
+            textView.setTextSize(8);
+        }else{
+            textView.setTextSize(10);
+        }
+        textView.setMaxLines(10);
+        textView.setLineSpacing(4.0f,1.2f);
+        messageList.addView(textView);
     }
 }
\ No newline at end of file
diff --git a/app/src/main/res/drawable/comment.png b/app/src/main/res/drawable/comment.png
new file mode 100644
index 0000000..963fbb5
--- /dev/null
+++ b/app/src/main/res/drawable/comment.png
Binary files differ
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 8685ed1..ff32829 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -3,6 +3,7 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/main"
+    android:background="#E0F7FA"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context=".views.MainActivity">
@@ -52,15 +53,67 @@
         app:layout_constraintTop_toTopOf="parent"
         app:layout_constraintVertical_bias="0.0" />
 
-    <ImageView
-        android:id="@+id/imageView"
-        android:layout_width="297dp"
-        android:layout_height="213dp"
+    <com.google.android.material.imageview.ShapeableImageView
+        android:id="@+id/myicon"
+        android.scaleType="centerCrop"
+        android:layout_width="150dp"
+        android:layout_height="150dp"
         android:src="@drawable/icon_cat"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.498"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:layout_constraintVertical_bias="0.598" />
+        app:layout_constraintVertical_bias="0.534"
+        app:shapeAppearance="@style/circle"
+        app:strokeColor="@color/black"
+        app:strokeWidth="2dp"/>
+
+    <!-- 吹き出し -->
+    <ImageView
+        android:id="@+id/commentimage"
+        android:layout_width="180dp"
+        android:layout_height="80dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.432"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.38"
+        app:srcCompat="@drawable/comment" />
+
+    <LinearLayout
+        android:layout_width="407dp"
+        android:layout_height="241dp"
+        android:orientation="vertical"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <!-- ホーム画面上のメッセージ表示欄 -->
+        <LinearLayout
+            android:id="@+id/messageList"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_weight="1"
+            android:orientation="vertical" />
+
+        <!-- ダイアログ起動ボタン -->
+    </LinearLayout>
+
+    <Button
+        android:id="@+id/openDialogButton"
+        android:layout_width="158dp"
+        android:layout_height="53dp"
+        android:backgroundTint="@color/white"
+        android:text="今何してる？"
+        android:textColor="@color/black"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.45"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.366" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/main_dialog.xml b/app/src/main/res/layout/main_dialog.xml
new file mode 100644
index 0000000..fb27329
--- /dev/null
+++ b/app/src/main/res/layout/main_dialog.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:padding="16dp"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <!-- 語群 -->
+
+    <!-- 入力欄 -->
+    <GridView
+        android:id="@+id/wordGrid"
+        android:layout_width="match_parent"
+        android:layout_height="150dp"
+        android:horizontalSpacing="5dp"
+        android:numColumns="3"
+        android:verticalSpacing="5dp"
+        android:textSize="2sp"/>
+
+    <!-- 送信ボタン -->
+
+    <EditText
+        android:id="@+id/editTextInput"
+        android:layout_width="380dp"
+        android:layout_height="61dp"
+        android:hint="自由に入力してもOK" />
+
+    <ImageButton
+        android:id="@+id/sendButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="end"
+        android:src="@android:drawable/ic_menu_send"
+        android:contentDescription="送信" />
+
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/themes.xml b/app/src/main/res/values/themes.xml
index b4bacf5..0afc5a0 100644
--- a/app/src/main/res/values/themes.xml
+++ b/app/src/main/res/values/themes.xml
@@ -6,4 +6,8 @@
     </style>
 
     <style name="Theme.Tampopoclient" parent="Base.Theme.Tampopoclient" />
+    <style name="circle">
+        <item name="cornerFamily">rounded</item>
+        <item name="cornerSize">50%</item>
+    </style>
 </resources>
\ No newline at end of file
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index d340e83..e461ba8 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -8,6 +8,7 @@
 activity = "1.9.3"
 constraintlayout = "2.2.0"
 legacySupportV4 = "1.0.0"
+materialVersion = "1.10.0"
 recyclerview = "1.3.2"
 retrofit = "3.1.0-SNAPSHOT"
 retrofitVersion = "3.0.0"
@@ -24,6 +25,7 @@
 activity = { group = "androidx.activity", name = "activity", version.ref = "activity" }
 constraintlayout = { group = "androidx.constraintlayout", name = "constraintlayout", version.ref = "constraintlayout" }
 legacy-support-v4 = { group = "androidx.legacy", name = "legacy-support-v4", version.ref = "legacySupportV4" }
+material-v1100 = { module = "com.google.android.material:material", version.ref = "materialVersion" }
 recyclerview = { group = "androidx.recyclerview", name = "recyclerview", version.ref = "recyclerview" }
 retrofit = { module = "com.squareup.retrofit2:retrofit", version.ref = "retrofit" }
 retrofit2-retrofit = { group = "com.squareup.retrofit2", name = "retrofit", version.ref = "retrofitVersion" }