Android storage helper enum

AndroidStorage.java

public enum AndroidStorage {

    /**
     * /data/data/com.mypackage.name/files
     */
    INTERNAL_APPLICATION,
    /**
     * /storage/emulated/0
     */
    EXTERNAL_ROOT,
    /**
     * /storage/emulated/0/Android/data/com.mypackage.name/files
     */
    EXTERNAL_APPLICATION;

    public String getPath(Context p_context) {
        switch (this) {
            case EXTERNAL_ROOT:
                return Environment.getExternalStorageDirectory().getPath();
            case EXTERNAL_APPLICATION:
                return p_context.getExternalFilesDir(null).getPath();
            case INTERNAL_APPLICATION:
                return p_context.getFilesDir().getPath();
        }

        return null;
    }

    public File getDirectory(Context p_context, String p_directory) {
        File file = new File(getPath(p_context), p_directory);
        if(!file.exists()) {
            file.mkdirs();
        }

        return file;
    }

    public static boolean isExternalReadable() {
        String state = Environment.getExternalStorageState();
        return state.equals(Environment.MEDIA_MOUNTED) || state.equals(Environment.MEDIA_MOUNTED_READ_ONLY);
    }

    public static boolean isExternalWritable() {
        String state = Environment.getExternalStorageState();
        return state.equals(Environment.MEDIA_MOUNTED);
    }

}