Question

I am facing a problem while trying to write a files into External SD Card in android 4.0.3,even I have made use of the write permissions like WRITE_EXTERNAL_STORAGE & WRITE_MEDIA_STORAGE, So I have found another way to work on it, but now I want to find out whether my app is possible to write into the Removable SD Card
or not, if not then I would like to switch to Internal SD Card.

So now the question is how will I come to know whether writing into Removable SD Card supported or not, So if anyone has done any similar kind of an implementation please feel free to share the code here.

Answer 1

Answer directly from the API guide:

http://developer.android.com/guide/topics/data/data-storage.html#filesExternal

    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;
    }