18 手动发广播扫描sd卡

1 public   void  systemScan(){  
2         sendBroadcast(new  Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse( "file://"   
3                 + Environment.getExternalStorageDirectory())));  
4     }
全盘扫描
原文地址:https://www.cnblogs.com/YyuTtian/p/5397916.html