scrollView.fullScroll(ScrollView.FOCUS_UP); 

scrollView.fullScroll(ScrollView.FOCUS_DOWN); 

handler.post(new Runnable() {  
  @Override  
  public void run() {  
   scrollView.fullScroll(ScrollView.FOCUS_DOWN);  
  }  
});  

   /* 
   *@params sl ScrollView 
   *    ll ScrollView包含的子View，我的是LinearLayout 
   */ 
   public void scrollToBottom(final View sl, final View ll) { 
Handler mHandler = new Handler(); 
mHandler.postDelayed(new Runnable() { 
  public void run() { 
    if (sl== null || ll == null) { 
      return; 
    } 
               //end要显示的位置，可以根据自己的需要来计算 
               int end = (ll.getMeasuredHeight() - sl.getHeight()) / 4; 
    if (end < 0) { 
      end = 0; 
    } 
    sl.scrollTo(0, end); 
  } 
}, 500);//延迟500ms启动