Fragment Intermediate(III): Creating a activity that alternate between fragments onclick of respective button

Question

Aim:

Create a activity that have two buttons, button 1 and button 2. When click, the fragment will alternate between the two fragments.

Background:

Fragm

Answer 1

While you add your Fragments dynamically, you keep your FragmentTwo inside your layout. Try to remove this in your layout:

Also, in your code, you add dynamically a Fragment and with replace method, you set the container as id fragment_place:

fragmentTransaction.replace(R.id.fragment_place, fr);  

However, this id is using by your fragment (FragmentTwo, the first piece of code above) and you cannot replace a fragment which is not added dynamically. You need to host your fragment inside a FrameLayout but yours has no id, try to add this:

Then, you will be able to host, add and replace your fragments into your framelayout as you want.