【android】使用handler更新UI

//初始化定义几种消息，不同的消息刷新不同的UI
private final static int PROGRESS_CHANGED = 0;
private final static int PROGRESS_STOP = 1;

//定义handler，刷新UI
Handler myHandler = new Handler(){
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
switch(msg.what){
case PROGRESS_CHANGED:
//...
//收到PROGRESS_CHANGED时刷新UI
//每1000ms
sendEmptyMessageDelayed(PROGRESS_CHANGED, 1000);
break;

case PROGRESS_STOP
//...
//收到PROGRESS_STOP 时刷新UI
//每2000ms
sendEmptyMessageDelayedPROGRESS_STOP 2000);
break;
}

super.handleMessage(msg);
}
};

myHandler.sendEmptyMessage(PROGRESS_CHANGED);

myHandler.removeMessages(PROGRESS_CHANGED);