Android Activity with runnable that accepts parameter and has callback

runnable_parameter_callback.java

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.os.SystemClock;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity {
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		final Button button = (Button)findViewById(R.id.button1);
		final EditText editText = (EditText)findViewById(R.id.editText1);
	
		button.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View vw) {
				button.setText(new Date().toString());
				editText.setText(new Date().toString());
				Runnable runnable = new Runnable() {
			        public void run() {
		            	Message msg = handler.obtainMessage();
		    			Bundle bundle = new Bundle();
		    			SystemClock.sleep(3000);
		    			SimpleDateFormat dateformat = new SimpleDateFormat("HH:mm:ss MM/dd/yyyy", Locale.US);
		    			String dateString = dateformat.format(new Date());
		    			bundle.putString("myArgument", dateString);
		                msg.setData(bundle);
		                handler.sendMessage(msg);
			        }
		      };
		      
		Thread mythread = new Thread(runnable);
		mythread.start();
			}
		});
	}

	public void editText1Clicked(View v) {
		EditText editText = (EditText)findViewById(R.id.editText1);
		editText.setText(new Date().toString());
	}
	
	Handler handler = new Handler() {
		  @Override
		  public void handleMessage(Message msg) {
			  Bundle bundle = msg.getData();
			  String argument = bundle.getString("myArgument");
			  EditText editText = (EditText)findViewById(R.id.editText1);
			  editText.setText(argument);
		     }
		 };
}