Android how to use Environment getExternalStorageDirectory

Question

How can i use Environment getExternalStorageDirectory   to read a a stored image from the SD card or is there a better way to do it

User · Answer

Have in mind though  that getExternalStorageDirectory   is not going to work properly on some phones e g  my Motorola razr maxx  as it has 2 cards  mnt sdcard and  mnt sdcard-ext - for internal and external SD cards respectfully  You will be getting the  mnt sdcard only reply every time  Google must provide a way to deal with such a situation  As it renders many SD card aware apps  i e card backup  failing miserably on these phones

User · Answer

Environment getExternalStorageDirectory   getAbsolutePath     Gives you the full path the SDCard  You can then do normal File I O operations using standard Java   Here s a simple example for writing a file   String baseDir   Environment getExternalStorageDirectory   getAbsolutePath    String fileName    myFile txt       Not sure if the   is on the path or not File f   new File baseDir   File separator   fileName   f write       f flush    f close      Edit   Oops - you wanted an example for reading      String baseDir   Environment getExternalStorageDirectory   getAbsolutePath    String fileName    myFile txt       Not sure if the   is on the path or not File f   new File baseDir   File Separator   fileName   FileInputStream fiStream   new FileInputStream f    byte   bytes      You might not get the whole file  lookup File I O examples for Java fiStream read bytes    fiStream close

User · Answer

As described in Documentation Environment getExternalStorageDirectory         Environment getExternalStorageDirectory   Return the primary   shared external storage directory    This is an example of how to use it reading an image    String fileName    stored image jpg    String baseDir   Environment getExternalStorageDirectory   getAbsolutePath     String pathDir   baseDir     Android data com mypackage myapplication      File f   new File pathDir   File separator   fileName            if f exists               Log d  Application    The file     file getName       exists              else            Log d  Application    The file no longer exists

User · Answer

To get the directory  you can use the code below   File cacheDir   new File Environment getExternalStorageDirectory     File separator

[android] Android how to use Environment.getExternalStorageDirectory()

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