android.system.ErrnoException: open failed: ENOENT (No such file or directory) 07-19 20:27:45.011 66

在操作安卓版本23+的文件读取时，不仅要在maniests中声明，还要在代码中动态声明：

 private static final int REQUEST_EXTERNAL_STORAGE = 1;    private static String[] PERMISSIONS_STORAGE = {            Manifest.permission.READ_EXTERNAL_STORAGE,            Manifest.permission.WRITE_EXTERNAL_STORAGE};    /**     * 8      * Checks if the app has permission to write to device storage     * 9      *     * 10      * If the app does not has permission then the user will be prompted to     * 11      * grant permissions     * 12      *     * 13      * @param activity     * 14     */    public static void verifyStoragePermissions(Activity activity) {        // Check if we have write permission        int permission = ActivityCompat.checkSelfPermission(activity,                Manifest.permission.WRITE_EXTERNAL_STORAGE);        if (permission != PackageManager.PERMISSION_GRANTED) {            // We don't have permission so prompt the user            ActivityCompat.requestPermissions(activity, PERMISSIONS_STORAGE,                    REQUEST_EXTERNAL_STORAGE);        }    }

然后直接调用就可以了。

来源出处：http://www.cnblogs.com/zzw1994/p/5021118.html
非常感谢，忙了一下午，终于解决了