這個需要在輸出，點選start後會隔一會輸出一行字，點end會結束輸出。

Code
package tk.handleractivity;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;



public class MyHangler extends
 
 Activity {

	private Button startButton=null;
	private Button endButton=null;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.myhangler);
        startButton=(Button)findViewById(R.id.startButton);
        startButton.setOnClickListener(new
 
 StartbuttonListener());
        endButton=(Button)findViewById(R.id.endButton);
        endButton.setOnClickListener(new EndbuttonListener());
        
        
    }

    class StartbuttonListener implements OnClickListener{
		@Override
		public void onClick(View v) {
			handler.post(updateThead);
		}    	
    }
    class
 
 EndbuttonListener implements OnClickListener{
		@Override
		public void onClick(View v) {
			handler.removeCallbacks(updateThead);
		}    	
    }
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.myhangler, menu);
        return true;
    }
    Handler handler=new Handler();
    Runnable updateThead=new Runnable() {
		
		@Override
		public void run() {
			System.out.println("UpdateThead");
			handler.postDelayed(updateThead, 3000);
		}
	};
}