Check SDCARD all possible state android

How can i check all possible state of SDCARD on android phone like ?

1. SDCARD mounted via the USB cable
2. SDCARD is installed
3. SDCARD have authority to read and write. if card is not mounted through U开发者_StackOverflow社区SB cable.
4. SDCARD have authority to read and write. if card is mounted through USB cable.
5. SDCARD available size.

Thanks in advance.

---

To get the state, you can use this instruction:

String state = Environment.getExternalStorageState();

Then, for example, if you want to check if the SDCARD is mounted :

if (Environment.MEDIA_MOUNTED.equals(state))

You can find further information in the Android documentation.

There is a nice SO post here talking about detecting mounted sd card via USB.. Regards.

---

Please refer to http://developer.android.com/reference/android/os/Environment.html to get SDCARD state

And refer to http://developer.android.com/reference/android/os/StatFs.html to get SDCARD available size.