how can I solve edittext recursion problem? - kotlin

Question

I was trying to implement live typeface change's in the edittextview
based on markdown syntax
and the first code I do was
my_edit_text_view.text = makeMDStyleSpannable(my_edit_text_view.text)//returns spannableString
but no luck since it is not invoking every time when text is changed
so I gave another try which is creating listener and testing things are working properly before I jump
my_edit_text_view.text = doOnTextChanged { it, start, count,after ->
if (it != null) {
if(it.isNotEmpty()){
Toast.makeText(this, (makeMDStyleSpannable(it)), Toast.LENGTH_SHORT).show()
}else if(it.isNullOrEmpty()){
}
}
}
as result it worked on another TOAST
However, here's the real recurring happened
my_edit_text_view.text = doOnTextChanged { it, start, count,after ->
if (it != null) {
if(it.isNotEmpty()){
my_edit_text_view.text = (makeMDStyleSpannable(it)
}else if(it.isNullOrEmpty()){
}
}
}
umm, what actually happening is while there is external text change(keyboard) on the edittext it calls makeMDStyleSpannable and this apply internal change then again and again it will call doOnTextChanged, Finally crashes.
How could I solve this problem?
keyboard(onText added[external]) => startThelistner => makeMDStyleSpannable[in]
/\ ||
||=====[infinite]=======
thanks

Answer 1

You can solve it by adding a boolean to check if text is changed by user or the code.
val shouldIgnoreChange = false
my_edit_text_view.text = doOnTextChanged { it, start, count,after ->
if (it != null) {
if(it.isNotEmpty()){
if(!shouldIgnoreChange){
shouldIgnoreChange = true
my_edit_text_view.text = (makeMDStyleSpannable(it)
shouldIgnoreChange = false
}
}else if(it.isNullOrEmpty()){
}
}
}