I am facing the issue like i created bottom navigation view fragments like homeFragment , listFragment, taskFragment and profileFragment and i add some button ,view, image in listFragment once we click the view or any button in listFragment i want to open a new fragment in this situation i want to manage my backstacks included the new fragment here is the code
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/frame_layout"
android:layout_marginBottom="?attr/actionBarSize" /> <!-- This frame layout is for
new fragment when we click fragment tab on button click -->
<com.google.android.material.bottomnavigation.BottomNavigationView
android:layout_width="match_parent"
android:layout_alignParentBottom="true"
android:id="@+id/btmNavigation"
android:layout_height="wrap_content"
app:menu="@menu/bottom_nav_items" />
</RelativeLayout>
Mainactivity.kt
package com.technoyt.myapplication
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.fragment.app.Fragment
import androidx.fragment.app.FragmentManager
import com.technoyt.myapplication.databinding.ActivityMainBinding
class MainActivity : AppCompatActivity() {
private val ROOT_FRAGMENT:String = "homeFragment"
lateinit var binding: ActivityMainBinding
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityMainBinding.inflate(layoutInflater)
setContentView(binding.root)
replaceFrag(homeFragment(), true)
binding.btmNavigation.setOnItemSelectedListener {
val i: Int = it.itemId
if (i == R.id.nav_home) {
replaceFrag(homeFragment(), true)
} else if (i == R.id.calender) {
replaceFrag(ListCalFragment(), false)
} else if (i == R.id.task) {
replaceFrag(taskFragment(), false)
} else {
replaceFrag(ProfileFragment(), false)
}
true
}
}
private fun replaceFrag(fragment: Fragment, flag: Boolean) {
val fragementManager = supportFragmentManager
val fragmentTransaction = fragementManager.beginTransaction()
if (flag) {
fragmentTransaction.add(R.id.frame_layout, fragment)
fragementManager.popBackStack(ROOT_FRAGMENT,FragmentManager.
fragmentTransaction.addToBackStack(ROOT_FRAGMENT) //ROOT
} else {
fragmentTransaction.replace(R.id.frame_layout, fragment)
fragmentTransaction.addToBackStack(null)
}
fragmentTransaction.commit()
}
}
homeFragment.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/Container"
android:background="#0A0A0A"
android:orientation="vertical"
tools:context=".MainActivity">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:visibility="visible"
android:layout_height="wrap_content"
android:background="#151515"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.appcompat.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.appcompat.widget.AppCompatTextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="@font/dmsansmedium"
android:text="Fitness Pro"
android:layout_marginStart="@dimen/_10sdp"
android:textColor="@color/white"
android:textSize="22sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.appcompat.widget.AppCompatImageView
android:id="@+id/imgpreferene" <!-- Once i will click the
imageview i want to open new fragment and manage backstack also-->
android:layout_width="@dimen/_25sdp"
android:layout_height="@dimen/_25sdp"
android:src="@drawable/whitesetting"
android:layout_marginEnd="@dimen/_20sdp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.AppBarLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
homefragment.kt
package com.technoyt.myapplication
import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment
import androidx.fragment.app.FragmentTransaction
import com.technoyt.myapplication.databinding.FragmentHomeBinding
class homeFragment : Fragment() {
private lateinit var binding: FragmentHomeBinding
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?
): View {
binding = FragmentHomeBinding.inflate(layoutInflater)
return binding.root
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
binding.imgpreferene.setOnClickListener { // when we click the image view i want to open new fragment this code is correct to do that work
val fragement: Fragment = PreferenceHomeFragment()
val ftt: FragmentTransaction =
requireActivity().supportFragmentManager.beginTransaction()
ftt.replace(R.id.frame_layout, fragement).commitNow()
}
}
}
But it is not manage back stack once i will click the image view it open PreferenceHomeFragment() when i click back it closes the app
I want to manage my bottom navigation fragment backstacks and also mange backstack the new fragment once we click the any out fragment tab to open a another tab please help me to solve this issue.
