在Android 4.2中访问/ sdcard

Question

I am developing an app that needs direct access to the root folder of the sdcard, however it seems in Android 4.2, the standard /sdcard directory now points to an "emulated" sdcard specific to the user running the app. This is not good, as my app requires access to a file that is stored on the top level of the sdcard. Does anyone know how to directly access the sdcard in Android 4.2?

Answer 1

Can you use the storage directory as a File type? ( java.io.File )

If so, you can get the external storage (Typically SD card, but will be main storage on phones with no SD card) by using code such as this in your method:

File path = Environment.getExternalStorageDirectory();

Additionally, access of storage requires READ_EXTERNAL_STORAGE permission in your Android Manifest - with WRITE_EXTERNAL_STORAGE being needed if any data is modified. Here are these permissions as they would appear in the manifest:

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

Sources:

http://developer.android.com/reference/android/os/Environment.html http://developer.android.com/reference/android/Manifest.permission.html

Answer 2

Perhaps I am misunderstanding your question, however, with my Nexus Galaxy running Android 4.2.1 I can access my sd card using Environment.getExternalStorageDirectory() . The returned directory is /storage/emulated/0 , but the content is that of /sdcard .