코드를 2일째 설명들어가며 짜보았는데 맨아랫부분 버튼3을 눌러서 멈추게 하는겁니다.
     근디.... 왜 안멈추죠 ㅠㅠ  
    도움주신  park님과 정말공부합시다님 모두 감사합니다. 근데  왜 안멈추죠 ㅠㅜ

       mTabHost = getTabHost();
        
        mTabHost.addTab(mTabHost.newTabSpec("tab_test1").setIndicator("TAB 1").setContent(R.id.Imageview1));
   
       
       
        mTabHost.addTab(mTabHost.newTabSpec("tab_test2").setIndicator("TAB 2").setContent(R.id.textview2));
        final ImageButton button1 = (ImageButton) findViewById(R.id.android_button1);
        button1.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
                // Perform action on clicks
                Toast.makeText(MWMK001.this, "1번학생부터 10번학생은..", Toast.LENGTH_SHORT).show();
                Toast.makeText(MWMK001.this, "1번 바니.", Toast.LENGTH_SHORT).show();
                Toast.makeText(MWMK001.this, "2번 또또.", Toast.LENGTH_SHORT).show();
                Toast.makeText(MWMK001.this, "3번 곰돌이.", Toast.LENGTH_SHORT).show();
            }
        });
        final ImageButton button2 = (ImageButton) findViewById(R.id.android_button2);
        button2.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
           
                // Perform action on clicks
             Toast.makeText(MWMK001.this, "11번학생부터 20번학생은..", Toast.LENGTH_SHORT).show();
                Toast.makeText(MWMK001.this, "11번 지영.", Toast.LENGTH_SHORT).show();
                Toast.makeText(MWMK001.this, "12번 나나.", Toast.LENGTH_SHORT).show();
                Toast.makeText(MWMK001.this, "13번 승리.", Toast.LENGTH_SHORT).show();
            }
        });
               //----------------------------- 바로 이 부분으로 버튼3을 눌러서, 출석부르는걸 멈추게 하려는데 잘못된부분이 있나요?
        final ImageButton button3 = (ImageButton) findViewById(R.id.android_button3);
        button3.setOnClickListener(new OnClickListener() {
            public void onClick(View v) {
   Toast.class.getEnclosingClass();
          
            }
            });