Android线程Handler小结（一）

package com.proper;

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

public class HandlerActivity extends Activity {
/** Called when the activity is first created. */
private Button start;
private Button end;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
start=(Button)findViewById(R.id.start);
end=(Button)findViewById(R.id.end);
start.setText("start");
end.setText("end");
start.setOnClickListener(new StartButtonListener());
end.setOnClickListener(new EndButtonListener());
}
class StartButtonListener implements OnClickListener{

public void onClick(View v) {
handler.post(updateThread);
// TODO Auto-generated method stub

}
}
class EndButtonListener implements OnClickListener{

public void onClick(View v) {
handler.removeCallbacks(updateThread);
// TODO Auto-generated method stub

}
}
Handler handler=new Handler();
Runnable updateThread=new Runnable() {

public void run() {
// TODO Auto-generated method stub
System.out.println("UpdateThread");
handler.postDelayed(updateThread,3000);
}
};
}