Question

所以，我正在尝试将mp4文件从临时文件保存到图片目录。平板电脑工作正常。但它不适用于三星关系。它甚至没有创建目录。

 private void moveFileToGallery() {
        File mediaStorageDir = new File(
                Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
                VIDEO_DIRECTORY_NAME);
        if (!mediaStorageDir.exists()) {
            if (!mediaStorageDir.mkdirs()) {
                Log.d(VIDEO_DIRECTORY_NAME, ": Failed to create directory");

                return;
            }
        }

        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss")
                .format(new Date());

        String videoFileName = "VID_"+timeStamp+".mp4";
        File source= new File("/sdcard/myvideo.mp4");
        File destination= new File(mediaStorageDir.getPath() + "/"+videoFileName);

        source.renameTo(destination);

        Toast.makeText(getApplicationContext(), "Video Saved to Gallery!", Toast.LENGTH_LONG).show();
    }
}

有人知道我的代码有什么问题吗？

Answer 1

打印目标路径的日志。我认为它有两个斜杠。（//）。因为你正在编写File.seperator +“/”。打印日志并检查路径。

Answer 2

更改此行

File destination= new File(mediaStorageDir.getPath() + File.separator+"/"+videoFileName);

到这个

File destination= new File(mediaStorageDir.getPath() + File.separator + videoFileName);

您正在使用额外的"/"，使用File.separator时不需要。检查这是否解决了您的问题

Answer 3

试试这段代码：

private void moveFileToGallery() {
        File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(DIRECTORY_PICTURES),"myvideo");
        if (!mediaStorageDir.exists()) {
            if (!mediaStorageDir.mkdirs()) {
                Log.d("myvideo", ": Failed to create directory");

                return;
            }
        }

        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());

        String videoFileName = "VID_"+timeStamp+".mp4";
        File source= new File(Environment.getExternalStorageDirectory() + File.separator + "myvideo.mp4");
        File destination= new File(mediaStorageDir.getPath() + File.separator + videoFileName);
        try {
            InputStream inputStream = getContentResolver().openInputStream(Uri.fromFile(source));
            FileOutputStream fileOutputStream = new FileOutputStream(destination);
            copyStream(inputStream, fileOutputStream);
            fileOutputStream.close();
            inputStream.close();

        } catch (IOException e) {
            e.printStackTrace();
        }


        Toast.makeText(getApplicationContext(), "Video Saved to Gallery!", Toast.LENGTH_LONG).show();
    }

也添加此功能：

public static void copyStream(InputStream input, OutputStream output)
            throws IOException {

        byte[] buffer = new byte[1024];
        int bytesRead;
        while ((bytesRead = input.read(buffer)) != -1) {
            output.write(buffer, 0, bytesRead);
        }
    }

视频没有保存？

3 个答案: