Communicate between different instances of same fragment

Question

The problem as follows. Let us have 3 tabs with fragments:

• Tab 1 (Fragment A). Needs to send data to Tab 2.
• Tab 2 (Fragment B). Needs to receive data

Answer 1

You didn't write how are you adding fragments, during runtime or not. It will be better to add it during runtime and assign TAG to a each fragment, like this:

...
fragmentTransaction.replace(R.id.layoutTab2, fragment, "F-B-2");
...
fragmentTransaction.replace(R.id.layoutTab3, fragment, "F-B-3");
...

so later you can identify or find fragment by its tag. For example:

FragmentManager.findFragmentByTag("F-B-2")

or if you need fragment B 3:

FragmentManager.findFragmentByTag("F-B-3")

Hope it will help.