How to save data from forms in xml file with the ability to load and change data?

Question

Java

How to implement saving and loading a data file in Android?
It is necessary to save the data from the forms to a file, preferably readable xml with the future loading of data from the file back into the form.
How can this be implemented ( Implement a conveniently readable xml file ), I think that there will be no problems with saving and loading.
If possible, give links to an example of this implementation.

Answer 1

PreferenceManager, create separate settings and stuff all the data there.
The system already stores them in xml
You send the entire file to the server