학교에서 어플만드는 과제를 하고있습니다

그런데 메뉴만드는거부터 막히네요

kb.java 파일쪽에 무슨 내용을 넣어야 메뉴를 누를시 다음화면으로 넘어가는지 모르겠습니다

도움의 손길을 부탁합니다

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<group
 android:id="@+id/megroup">
 <item
  android:id="@+id/Menu_1"
     android:icon="@drawable/menu_input"
     android:title="@string/input"
     android:orderInCategory="1">
    </item>
    <item
     android:id="@+id/Menu_2"
     android:icon="@drawable/menu_start"
     android:title="@string/start"
     android:orderInCategory="2">
    </item>
    <item
     android:id="@+id/Menu_3"
     android:icon="@drawable/menu_info"
     android:title="@string/info"
     android:orderInCategory="3">
    </item>
    <item
     android:id="@+id/Menu_4"
     android:icon="@drawable/menu_goal"
     android:title="@string/goal"
     android:orderInCategory="4">
    </item>
</group>
</LinearLayout>

strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">kb</string>
    <string name="input">흡연이력</string>
    <string name="start">금연시작</string>
 <string name="info">금연정보</string>
    <string name="goal">목표설정</string>
</resources>

kb.java

package kb.kb;

import android.app.Activity;
import android.os.Bundle;
import android.content.Intent;
import android.view.View;
import android.widget.ImageView;
import android.net.Uri;

public class kb extends Activity {
    protected static final boolean menu_1 = false;
    protected static final boolean menu_2 = false;
    protected static final boolean menu_3 = false;
    protected static final boolean menu_4 = false;

 /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
    ImageView iv1 = (ImageView)findViewById(R.id.Menu_1);
    ImageView iv2 = (ImageView)findViewById(R.id.Menu_2);
    ImageView iv3 = (ImageView)findViewById(R.id.Menu_3);
    ImageView iv4 = (ImageView)findViewById(R.id.Menu_4);

    }
}