CODEWITHSUNDEEP
androidkotlin
manoj gundapaneni
manoj gundapaneni

Reputation: 11

On Up back button click navigate to particular fragment from activity

I am trying to navigate from an second activity to specific fragment in Bottom Navigation View in first activity by using Up(<-) back Button. i have tried code

         val actionBar = supportActionBar
         actionBar!!.setDisplayHomeAsUpEnabled(true)

but,while placing parent activity in Manifest File,it wont show the fragment which is required by me.it is going to Home fragment in the 1st activity.

This is my fragment code in First Activity

      btm = findViewById(R.id.navigation) as BottomNavigationView
         btm.setOnNavigationItemSelectedListener { item ->
        var selectedFragment: Fragment? = null
        when (item.itemId) {
            R.id.navigation_home ->
                selectedFragment = ReferFragment.newInstance()
            R.id.navigation_dashboard ->
                selectedFragment = AccountFragment.newInstance()
            R.id.navigation_notifications ->
                selectedFragment = ProfileFragment.newInstance()
        }

        var ft: FragmentTransaction = 
                    supportFragmentManager.beginTransaction()
        ft.replace(R.id.fragment_container, selectedFragment)
        ft.commit()
        true
    }
    var ft: FragmentTransaction = supportFragmentManager.beginTransaction()
    ft.replace(R.id.fragment_container, ReferFragment.newInstance())
    ft.commit()

i want to goto 3rd fragment while clicking on UP backButton in second activity. THANK YOU

Upvotes: 0

Views: 286

Answers (1)

Vir Rajpurohit
Vir Rajpurohit

Reputation: 1937

On Clicking Up back button from Second Activity pass an Intent Flag.

like below

Intent mIntent=new Intent(SecondActivity.this,FirstActivity.class);
mIntent.putExtra("IS_FROM_SECOND",true);
startActivity(mIntent);

Now in First Activity in onCreate()

check intent

boolean isFromSecond=getIntent().hasExtra("IS_FROM_SECOND");

Note:- Do not use key "IS_FROM_SECOND" in any other intent.

so if it is the case then check 

if(isFromSecond)
  var ft: FragmentTransaction = supportFragmentManager.beginTransaction()
    ft.replace(R.id.fragment_container, 3rdFragment.newInstance())
    ft.commit()
}

Upvotes: 1

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