[Add] submenu

@@ -19,6 +19,8 @@
                 <category android:name="android.intent.category.LAUNCHER" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
             </intent-filter>
         </activity>
         </activity>
+        <activity android:name = ".ChoiceActivity"/>
+        <activity android:name = ".ExerciseActivity"/>
     </application>
     </application>
 
 
 </manifest>
 </manifest>
\ No newline at end of file

+package com.khuhacker.pocketgym;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+
+public class ChoiceActivity extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_choice);
+    }
+
+    public void onClick(View view) {
+        if(view.getId() == R.id.pushupBtn) {
+            Intent intent = new Intent(this, ExerciseActivity.class);
+            startActivity(intent);
+        }
+        else if(view.getId() == R.id.squatBtn){
+
+        }
+
+        else if(view.getId() == R.id.backBtn){
+            finish();
+        }
+    }
+}

@@ -2,7 +2,9 @@ package com.khuhacker.pocketgym;
 
 
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.app.AppCompatActivity;
 
 
+import android.content.Intent;
 import android.os.Bundle;
 import android.os.Bundle;
+import android.view.View;
 
 
 public class FirstActivity extends AppCompatActivity {
 public class FirstActivity extends AppCompatActivity {
 
 
@@ -11,4 +13,14 @@ public class FirstActivity extends AppCompatActivity {
         super.onCreate(savedInstanceState);
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_first);
         setContentView(R.layout.activity_first);
     }
     }
+
+    public void onClick(View view) {
+        if(view.getId() == R.id.exerciseBtn) {
+            Intent intent = new Intent(this, ChoiceActivity.class);
+            startActivity(intent);
+        }
+        else if(view.getId() == R.id.reportBtn){
+
+        }
+    }
 }
 }

+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#FFFFFF"
+    android:orientation="vertical">
+    <ImageView
+        android:layout_gravity="left|top"
+        android:layout_width="50dp"
+        android:layout_height="50dp"
+        android:id="@+id/backBtn"
+        android:src="@drawable/back_icon"
+        android:padding="5dp"
+        android:layout_margin="5dp"
+        android:onClick="onClick"/>
+
+    <LinearLayout
+        android:layout_width="180dp"
+        android:layout_height="180dp"
+        android:layout_gravity="center"
+        android:background="@drawable/stroke_main"
+        android:elevation="40dp"
+        android:orientation="vertical"
+        android:padding="15dp"
+        android:layout_margin="30dp"
+        android:id="@+id/pushupBtn"
+        android:onClick="onClick">
+
+        <ImageView
+            android:layout_width="100dp"
+            android:layout_height="100dp"
+            android:layout_gravity="center"
+            android:src="@drawable/pushup_icon" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:text="팔굽혀펴기"
+            android:textColor="@color/pacific"
+            android:textSize="80px"
+            android:textStyle="bold"/>
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="180dp"
+        android:layout_height="180dp"
+        android:layout_gravity="center"
+        android:background="@drawable/stroke_main"
+        android:elevation="40dp"
+        android:orientation="vertical"
+        android:padding="15dp"
+        android:layout_margin="30dp"
+        android:id="@+id/squatBtn"
+        android:onClick="onClick">
+
+        <ImageView
+            android:layout_width="70dp"
+            android:layout_height="100dp"
+            android:layout_gravity="center"
+            android:src="@drawable/squat_icon" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:text="스쿼트"
+            android:textColor="@color/pacific"
+            android:textSize="80px"
+            android:textStyle="bold"/>
+    </LinearLayout>
+</LinearLayout>
\ No newline at end of file

@@ -14,7 +14,9 @@
         android:elevation="40dp"
         android:elevation="40dp"
         android:orientation="vertical"
         android:orientation="vertical"
         android:padding="15dp"
         android:padding="15dp"
-        android:layout_margin="30dp">
+        android:layout_margin="30dp"
+        android:id="@+id/exerciseBtn"
+        android:onClick="onClick">
 
 
         <ImageView
         <ImageView
             android:layout_width="100dp"
             android:layout_width="100dp"
@@ -40,7 +42,9 @@
         android:elevation="40dp"
         android:elevation="40dp"
         android:orientation="vertical"
         android:orientation="vertical"
         android:padding="15dp"
         android:padding="15dp"
-        android:layout_margin="30dp">
+        android:layout_margin="30dp"
+        android:id="@+id/reportBtn"
+        android:onClick="onClick">
 
 
         <ImageView
         <ImageView
             android:layout_width="70dp"
             android:layout_width="70dp"