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my app having only two base activity and several fragment,, i want to display an Exit alert when user reach particular base fragment by clicking back press
override fun onBackPressed() {
if (drawer_layout.isDrawerOpen(GravityCompat.START)) {
drawer_layout.closeDrawer(GravityCompat.START)
} else {
// super.onBackPressed()
AlertDialog.Builder(this)
.setTitle("Exit Alert")
.setMessage("Do You Want To Exit Petals App?")
.setPositiveButton(android.R.string.ok) { dialog, whichButton ->
super.onBackPressed()
}
.setNegativeButton(android.R.string.cancel) { dialog, whichButton ->
}
.show()
}
i used addtosatck on each fragment
475
This example demonstrates how do I handle back button in an android activity. Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project. Step 2 − Add the following code to res/layout/activity_main. xml.
Here is the new way you can manage your onBackPressed() in fragment with the new call back of activity: // Disable onBack click requireActivity(). onBackPressedDispatcher. addCallback(this) { // With blank your fragment BackPressed will be disabled. }
At first Check Visible Fragment
val currentFragment [email protected](R.id.Your_id)
if(currentFragment is FragmentName)
{
// AlertDialog()
}
Finally
override fun onBackPressed()
{
if (drawer_layout.isDrawerOpen(GravityCompat.START)) {
drawer_layout.closeDrawer(GravityCompat.START)
} else
{
val currentFragment [email protected](R.id.Your_id)
if(currentFragment is SpecificFragmentName)
{
AlertDialog.Builder(this@ActivityName)
.setTitle("Exit Alert")
.setMessage("Do You Want To Exit Petals App?")
.setPositiveButton(android.R.string.ok) { dialog, whichButton ->
super.onBackPressed()
}
.setNegativeButton(android.R.string.cancel) { dialog, whichButton ->
}
.show()
}
else{
super.onBackPressed()
}
}
}
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