Handling back press in nested fragment android

Question

I am working with nested fragment and I am facing issue when I press back.

Flow:

FragementActivity

A(Fragment)     B(Fragment)

 C      D        E     F

This is a structur of my application. Where C,D,E,F is child fragments and not added in back stack. D contains List fragment, and from DI called B. But When I press back from BI want again D with last selected position. I added A and B in back stack. How can I achieve this. Provide me some solutions. I recalled D but the selected position changed always.

Answer 1

您是否尝试重写方法onBackPressed（）？

Answer 2

In addition to other functionality, you might have to call some functionality to hide the current visible fragment. I have attached snippet in Kotlin

override fun onBackPressed() {
    // ...

    val thisStep = myAdapter?.getItem(currentFragmentPosition) as MyFragmentStep

    thisStep.setInvisible(runData)
}


//This goes on your activity ^^^


fun setInvisible(runData: Bundle) {

    // ...

    view?.visibility = View.INVISIBLE
}


//This goes on your base class of fragments  ^^^