SSIV in Jetpack Compose (AndroidView)
Author: lukaspieperCreated Apr 14, 2021Updated Oct 8, 2023
Expected behaviour
SSIV is working as it does outside of jetpack compose.
Actual behaviour
SSIV freezes after some time when zooming in/out and dragging the image around. Then it does not respond to further gestures. More technically, onDraw() is no longer called once SSIV is frozen. Only when I call invalidate() from a button, SSIV moves again. But after that it freezes again pretty fast. This process can be repeated for as long as desired.
No exception or other warning occurs. For me personally it almost looks like SSIV is running in an infinite loop?
Steps to reproduce
private lateinit var ssiv: SubsamplingScaleImageView
@Composable
fun SsivCompose() {
AndroidView(
modifier = Modifier.fillMaxSize(),
factory = { context ->
SubsamplingScaleImageView(context).apply {
ssiv = this
setDebug(true)
setOnTouchListener { _, _ ->
// After SSIV is frozen, this message is still logged
logDebug("Touched!!!")
return@setOnTouchListener false
}
// ZOOM_FOCUS_CENTER_IMMEDIATE is the only zoom style that does not freeze SSIV immediately
// setDoubleTapZoomStyle(SubsamplingScaleImageView.ZOOM_FOCUS_CENTER_IMMEDIATE)
setImage(ImageSource.uri(file.uri))
}
}
)
Button(onClick = { ssiv.invalidate() }) {
}
}Affected devices
Tested on Pixel 3, emulator
Affected images
All images
Many thanks.
Source: davemorrissey/subsampling-scale-image-view