How to pass object data between two fragments in an application?

To pass data between two fragments in Android, arguments (Bundle) are usually used.

Main methods:

1. Via Bundle in setArguments/getArguments

   • In the first fragment, create a Bundle, put data into it (primitives, Serializable, Parcelable).
   • Set the Bundle to the second fragment using setArguments.
   • In the second fragment, retrieve data through getArguments.

2. Via ViewModel (if fragments belong to the same Activity)

   • Create a shared ViewModel.
   • The first fragment writes data into the ViewModel.
   • The second fragment reads data from the ViewModel.

Example of passing data via Bundle:

// In the first fragment
Bundle bundle = new Bundle();
bundle.putString("key", "value");
SecondFragment fragment = new SecondFragment();
fragment.setArguments(bundle);

// In the second fragment
@Override
public View onCreateView(...) {
    Bundle args = getArguments();
    if (args != null) {
        String value = args.getString("key");
    }
    // ...
}

If the object is complex, it is recommended to implement Parcelable for efficient data transfer.