Transition by button from one activity to a fragment of another activity. How to implement?

Question

Java

There are two activities. The first activity has fragment1 and fragment2. Fragment1 has a button that launches the second activity, and it has a button that, when clicked, should open fragment2 from the first activity. How should I write the onClick of the button in the second activity so that fragment2 opens from the first one?

Answer 1

Maybe I misunderstood, but I would do this:
1. Launch the second activity through startActivityForResult, when you click on the button (make a callback from the fragment to the activity)
2. In the second activity, when you click, put some meta information and destroy the activity
3. In the first activity, you intercept information in onActivityResult and add a second fragment based on it

Answer 2

Throw out the second activity, do it entirely on fragments.