使用opencv的Android应用程序：如何在不覆盖的情况下保存图像？ [英] Android App using opencv: how to save an image without overwriting?

问题描述

当我选择一个选项时，我正在使用以下代码将图像保存到文件夹：

I'm using the following code to save an image to a folder when I select an option:

File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
String filename = "teste.png";
File file = new File(path, filename);
filename = file.toString();
Highgui.imwrite(filename, mRgba);

但我希望保存的图像不会覆盖已存在于文件夹中的图像。我怎么能这样做？对于每个图像或类似的东西使用一种索引，我想，​​但是如何？

But i'd like the saved image to NOT OVERWRITE the image that's already in the folder. How could I do that? Using a kind of index for each image or something like that, I think, but how?

谢谢。

推荐答案

也许是这样的？

File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "MyAppDir");

if (!mediaStorageDir.exists()) {
    if (!mediaStorageDir.mkdirs()) {
        Log.e(TAG, "failed to create directory");
        return null;
    }
}

String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
File mediaFile;
mediaFile = new File(mediaStorageDir.getPath() + File.separator + "testimage_" + timeStamp + ".png");

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