Intent intent=new Intent(Intent.ACTION_MEDIA_MOUNTED);
intent.setData(Uri.fromFile(Environment.getExternalStorageDirectory()));
//发送一条广播
sendBroadcast(intent);
Intent intent=new Intent(Intent.ACTION_MEDIA_MOUNTED);
intent.setData(Uri.fromFile(Environment.getExternalStorageDirectory()));
//发送一条广播
sendBroadcast(intent);