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I accidentally deleted the contents of .thumbnails folder in DCIM in sdcard. After deleting it I am unable to access MediaStore.Images.Thumbnails._ID however MediaStore.Images.Media.DATA is having all the images. How do I regenerate thumbnails in the .thumbnails folder to get the details of MediaStore.Images.Thumbnails._ID?

I initially had the idea that the gallery app in Android generates thumbnails in the .thumbnails folder so what I did was clear the cache of gallery app. Unmounted the sdcard and mounted it again in the hope that .thumbnail folder will have all the thumbnails when I relaunch the app

I am using HTC One V(Android version 4.0)

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You answered yourself. The gallery automatically recreates the thumbnails.. – varunyellina Nov 5 '12 at 11:45

Go to Setting-->Applications--->Gallery-->Clear Cache

After clearing the cache, open the gallery app, it will automatically regenerate thumbnails.

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