判断是否有sdcard

判断是否有sdcard插入：

?

1. public?boolean?avaiableMedia(){??
2. ????????String?status=Environment.getExternalStorageState();??
3. ??????????
4. ????????if(status.equals(Environment.MEDIA_MOUNTED)){??
5. ????????????return?true;??
6. ????????}??
7. ????????else?{??
8. ????????????return?false;??
9. ????????}??
10. ????}??

?

?

true: 有

false: 无