Activity类的runOnUiThread方法

1. /**
2.  * Runs the specified action on the UI thread. If the current thread is the UI
3.  * thread, then the action is executed immediately. If the current thread is
4.  * not the UI thread, the action is posted to the event queue of the UI thread.
5.  *
6.  * @param action the action to run on the UI thread
7.  */  
8. public final void runOnUiThread(Runnable action) {  
9. if (Thread.currentThread() != mUiThread) {  
10.         mHandler.post(action);  
11. else {  
12.         action.run();  
13.     }  
14. }

使用：

 runOnUiThread可以帮助你在线程中执行UI更新操作，我们只需要在线程中写上类似

youractivity. runOnUiThread(new Runnable() { 
                    @Override 
                        public void run() {                            // refresh ui 的操作代码
                        } 
                    });

  这里需要注意的是runOnUiThread是Activity中的方法，在线程中我们需要告诉系统是哪个activity调用，所以前面显示的指明了activity。