What methods are used to exchange images between different programs or modules?

Image exchange between different programs or modules in Android is usually done through:

1. Intent with URI transfer — the image is saved in external or internal storage, then the URI of this file is passed via Intent. The receiver can access the image via URI.
2. ContentProvider — for more secure and controlled access, a ContentProvider can be used, which provides a URI with access rights.
3. Transfer via Bitmap in Bundle — if the image is small, it can be passed directly as a Bitmap object in Intent or Bundle, but this is inefficient for large images.
4. Clipboard — the image can be copied to clipboard and pasted into another app.
5. File sharing — save the image in a shared directory, like "Pictures", and access it from another app.

Example of passing an image via Intent with URI:

val imageFile = File(context.cacheDir, "image.png")
val imageUri: Uri = FileProvider.getUriForFile(context, "com.example.fileprovider", imageFile)

val intent = Intent().apply {
    action = Intent.ACTION_SEND
    putExtra(Intent.EXTRA_STREAM, imageUri)
    type = "image/png"
    addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
}
context.startActivity(Intent.createChooser(intent, "Share image"))