在Android上：我怎样才能重新扫描整个文件夹来监视变化.nomedia [英] On Android: How can I rescan an entire folder to watch for changes in .nomedia

问题描述

所以，我的应用程序下载的用户从在线源要求的图像。通过在活动的一个按钮，用户可以选择隐藏或显示在画廊中的图像。这是很容易的，我只是根据需要添加或删除.nomedia文件。不过，我想每一次这样的变化是即时的，无需进一步的用户交互重新扫描介质。

So my app downloads images at the users' request from an online source. Through a button in the activity, the user can choose to hide or show the images in the gallery. This is easy enough, I just add or remove a .nomedia file as needed. However, I want to rescan media every time so that the change is instant, and requires no further user interaction.

之后，我使用的方法在 http://www.mail-archive.com/[e-mail]/msg24164.html 扫描特定的图像到库中。对于一个图像的伟大工程，但是当.nomedia文件被添加，我真正需要的是能够扫描整个目录。

After each image is downloaded, I am using the method at http://www.mail-archive.com/[e-mail]/msg24164.html to scan the specific image into the library. That works great for one image, but when the .nomedia file is added, I really need to be able to scan a whole directory.

我已经考虑调用MediaScannerNotifier目录中的每个图像上，但似乎只是笨拙和懒惰。

I have considered calling the MediaScannerNotifier on each image in the directory, but that just seems clumsy and lazy.

建议？

推荐答案

终于找到了在<一个href="http://groups.google.com/group/android-developers/browse_thread/thread/c1a385226f3df482">http://groups.google.com/group/android-developers/browse_thread/thread/c1a385226f3df482.

这是一个班轮：

sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse
("file://"
+ Environment.getExternalStorageDirectory())));

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