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How do I add functionality to the back button in Android without reimplementing the back button entirely? Prior to last year, I would just call onBackPressed() and then simply override it: overri...
Question
android
#3: Post edited
by
Ullallulloo
·
2023-07-14T12:09:52Z (10 months ago)
Fix code
- How do I add functionality to the back button in Android without reimplementing the back button entirely?
- Prior to last year, I would just call `onBackPressed()` and then simply override it:
- ```kotlin
- override fun onBackPressed() {
- super.onBackPressed()
- doMyStuff()
- }
- ```
- Now this is deprecated, and it's recommended to use `OnBackPressedCallback` objects. It's simple enough to replace `onBackPressed()` with `onBackPressedDispatcher.onBackPressed()`, but I can't figure out how to recreate the override.
- I can replace the functionality easy enough:
- ```kotlin
- override fun onCreate(savedInstanceState: Bundle?) {
- super.onCreate(savedInstanceState)
- …
- onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
doMyStuff()- })
- }
- ```
- However, this replaces *all* back button behavior. It doesn't just add to it, despite the function name. I still want the back button to go back, but don't want to have to try to reinvent the wheel. Is there some equivalent to `super.onBackPressed()` with this new API or another way to achieve this?
- How do I add functionality to the back button in Android without reimplementing the back button entirely?
- Prior to last year, I would just call `onBackPressed()` and then simply override it:
- ```kotlin
- override fun onBackPressed() {
- super.onBackPressed()
- doMyStuff()
- }
- ```
- Now this is deprecated, and it's recommended to use `OnBackPressedCallback` objects. It's simple enough to replace `onBackPressed()` with `onBackPressedDispatcher.onBackPressed()`, but I can't figure out how to recreate the override.
- I can replace the functionality easy enough:
- ```kotlin
- override fun onCreate(savedInstanceState: Bundle?) {
- super.onCreate(savedInstanceState)
- …
- onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
- override fun handleOnBackPressed() {
- doMyStuff()
- }
- })
- }
- ```
- However, this replaces *all* back button behavior. It doesn't just add to it, despite the function name. I still want the back button to go back, but don't want to have to try to reinvent the wheel. Is there some equivalent to `super.onBackPressed()` with this new API or another way to achieve this?
#2: Nominated for promotion
by
Alexei
·
2023-07-13T08:26:03Z (10 months ago)
#1: Initial revision
by
Ullallulloo
·
2023-07-09T21:32:05Z (10 months ago)
How do I add functionality to the back button?
How do I add functionality to the back button in Android without reimplementing the back button entirely?
Prior to last year, I would just call `onBackPressed()` and then simply override it:
```kotlin
override fun onBackPressed() {
super.onBackPressed()
doMyStuff()
}
```
Now this is deprecated, and it's recommended to use `OnBackPressedCallback` objects. It's simple enough to replace `onBackPressed()` with `onBackPressedDispatcher.onBackPressed()`, but I can't figure out how to recreate the override.
I can replace the functionality easy enough:
```kotlin
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
…
onBackPressedDispatcher.addCallback(this, object : OnBackPressedCallback(true) {
doMyStuff()
})
}
```
However, this replaces *all* back button behavior. It doesn't just add to it, despite the function name. I still want the back button to go back, but don't want to have to try to reinvent the wheel. Is there some equivalent to `super.onBackPressed()` with this new API or another way to achieve this?