打開通知欄

try { 
   Object service = getSystemService ("statusbar"); 
   Class <?> statusBarManager = Class.forName 
("android.app.StatusBarManager"); 
   Method expand = statusBarManager.getMethod ("expand"); 
   expand.invoke (service); 
} catch (Exception e) { 

   Toast.makeText(getApplicationContext(), e.getMessage(), 
Toast.LENGTH_LONG).show(); 
} 

這裏要加上權限: 
<uses-permission android:name="android.permission.EXPAND_STATUS_BAR" / >