There you can follow some steps :
- check that whether whatsapp installed or not
- if installed then check in which directory it keeps its downloaded image.
- if it is a separate folder & can be accessible from outside of that app then you can normally use that images.
- if it downloaded its image in a common directory then then it’s not possible to find out which images are downloaded by whatsapp.
Thank you.
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solved how to enlist whatsapp images programmatically in android? [closed]