how to check internal and external storage if exist

Question

How do i know if there are internal and external storage in android pragmatically? does anyone how to know how to check both internal and external storage

thanks in advance

Answer 1

it's already explained in android documentation.

Code taken from documentation

boolean mExternalStorageAvailable = false; boolean mExternalStorageWriteable = false; String state = Environment.getExternalStorageState();  if (Environment.MEDIA_MOUNTED.equals(state)) {     // We can read and write the media     mExternalStorageAvailable = mExternalStorageWriteable = true; } else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {     // We can only read the media     mExternalStorageAvailable = true;     mExternalStorageWriteable = false; } else {     // Something else is wrong. It may be one of many other states, but all we need     //  to know is we can neither read nor write     mExternalStorageAvailable = mExternalStorageWriteable = false; } 

Answer 2

I wrote a little class for that checking the storage state. Maybe it's of some use for you.

UPDATE: Cleaned up code, removed comments and made class static.

import android.os.Environment;  public class StorageHelper {      private static boolean externalStorageReadable, externalStorageWritable;      public static boolean isExternalStorageReadable() {         checkStorage();         return externalStorageReadable;     }      public static boolean isExternalStorageWritable() {         checkStorage();         return externalStorageWritable;     }      public static boolean isExternalStorageReadableAndWritable() {         checkStorage();         return externalStorageReadable && externalStorageWritable;     }      private static void checkStorage() {         String state = Environment.getExternalStorageState();         if (state.equals(Environment.MEDIA_MOUNTED)) {             externalStorageReadable = externalStorageWritable = true;         } else if (state.equals(Environment.MEDIA_MOUNTED) || state.equals(Environment.MEDIA_MOUNTED_READ_ONLY)) {             externalStorageReadable = true;             externalStorageWritable = false;         } else {             externalStorageReadable = externalStorageWritable = false;         }     }  }