Differences and ways of using intent and bundle transfer values between activity

There is no difference in nature between the two.
Bundles are just a carrier of information that organizes internal content into key-value pairs
Intent is responsible for the interaction between the activity itself with a bundle of
Intent.putextras (Bundle bundle) directly sets the Intent internal bundle as the bundle in the parameter
Intent.getextras () direct access to Intent with bundles

Intent.putextra (key, value)
And
Bundle bundle = Intent.getextras ();
Bundle.putxxx (key, value);
Intent.putextras (bundle);
is equivalent to

Intent.getxxxextra (Key)
And
Bundle bundle = Intent.getextras ();
Bundle. GetXXX (key);
is equivalent (XXX represents the Data/object type String Boolean or something)

Differences and ways of using intent and bundle transfer values between activity