Handler相关------方法，更新UI，异步，解决数据加载量等

Handler的更新UI
new Handler().postDelayed(Runable,delaytime);

延迟intent跳转,一般用于闪屏，loading界面，或者延迟一段时间发送消息

Runnable r = new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
startGoPage();
}
};
new Handler().postDelayed(r, 2000);
------------------------
startGoPage()｛
Inent intent = new Inent(xx.this,xxx.class);
startActivity(intent);
finish();
｝