Refresh gallery on Android 7 downwards?

I can use MediaScannerConnection.scanFile() as of SDK 2.2+.

After taking an image and saving开发者_如何学Python it on the sd card, how can I trigger scanning of images in SDKs lower than 2.2 (2.1 downwards)?

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There are two MediaScannerConnection.scanFile(..) methods. Use the one available since API 1.

// available since API 1
scanFile (String path, String mimeType)  

// available since API 8
scanFile (Context context, String[] paths, String[] mimeTypes, MediaScannerConnection.OnScanCompletedListener callback)