如何将多个选定图像从图库复制到Android中的另一个文件夹

Question

我使用ACTION_PICK来调用默认的Android图库和EXTRA_ALLOW_MULTIPLE来选择多个图像。现在我尝试将所有选定的图像复制到另一个文件夹，但是当选择多个（3个或更多）图像然后继续复制时，只复制了两个图像。

抱歉，我是初学Android编程。

将多个所选图像从Gallery复制到另一个文件夹的正确方法是什么？

这是我的代码：

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode == RESULT_OK) {

            if (requestCode == PICK_IMAGE_MULTIPLE) {
                    switch (requestCode) {
                        case PICK_IMAGE_MULTIPLE:
                    if(data!=null){
                        ClipData clipdata = data.getClipData();
                        if(clipdata!=null){

                            for (int i = 0; i < clipdata.getItemCount(); i++) {
                                ClipData.Item item = clipdata.getItemAt(i);
                                Uri uri = item.getUri();
                                    String root = Environment.getExternalStorageDirectory().getAbsolutePath()+ "/";
                                    File f = new File(root + "New Folder" + File.separator);
                                    f.mkdir();
                                    String PictureName = getPicturename();
                                        try {
                                            if (f.exists()&&uri!=null) {
                                                File file = new File(root + "New Folder" + File.separator + PictureName);
                                                 file.createNewFile();

                                                 path = getPath(getApplicationContext(), uri);
                                                    File src = new File(path);
                                                    copyFile(src,file);
                                                    Toast.makeText(this, "Copy File" + path, Toast.LENGTH_SHORT).show();    
                                            }
                                    }catch (IOException e){
                                        // TODO Auto-generated catch block
                                        e.printStackTrace();
                                        Toast.makeText(this, "Directory not create", Toast.LENGTH_SHORT).show();
                                }

                            }
                        }

                    }
                        break;
                    }
                }
            }
        }


    public String getPath(Context context,Uri contentUri) {
        Cursor cursor = null;
        try {
            String[] proj = {MediaStore.Images.Media.DATA};
            cursor = context.getContentResolver().query(contentUri, proj, null,
                    null, null);
            int column_index = cursor
                    .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            return cursor.getString(column_index);
        } finally {
            if (cursor != null) {
                cursor.close();
            }
        }

    }

    public void copyFile(File sourceFile , File destFile)
            throws IOException {
        InputStream in = new FileInputStream(sourceFile);
        OutputStream out = new FileOutputStream(destFile);

        // Transfer bytes from in to out
        byte[] buf = new byte[1024];
        int len;
        while ((len = in.read(buf)) > 0) {
            out.write(buf, 0, len);
        }
    }

    private String getPicturename() {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd_HHmmss");
        String timestamp = sdf.format(new Date());
        return "Img" + timestamp + ".jpg";

    }
}