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Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.graphics.Bitmap.isMutable()' on a null object reference
at android.graphics.Canvas.<init>(Canvas.java:113)
at com.google.maps.api.android.lib6.impl.a.a(:com.google.android.gms.policy_maps_core_dynamite@231710105@231710102065.533527097.533527097:1)
at com.google.maps.api.android.lib6.phoenix.be.run(:com.google.android.gms.policy_maps_core_dynamite@231710105@231710102065.533527097.533527097:2)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:226)
at android.os.Looper.loop(Looper.java:313)
at android.app.ActivityThread.main(ActivityThread.java:8757)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:571)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1067)
AND
Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.graphics.Bitmap.isMutable()' on a null object reference
at android.graphics.Canvas.<init>(Canvas.java:113)
at com.google.maps.api.android.lib6.impl.a.a(:com.google.android.gms.policy_maps_core_dynamite@231112107@231112103065.517507265.517507265:1)
at com.google.maps.api.android.lib6.phoenix.be.run(:com.google.android.gms.policy_maps_core_dynamite@231112107@231112103065.517507265.517507265:2)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7884)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)
at android.graphics.Canvas.<init>(Canvas.java:113)
at com.google.maps.api.android.lib6.impl.a.a(:com.google.android.gms.policy_maps_core_dynamite@231710105@231710102065.533527097.533527097:1)
at com.google.maps.api.android.lib6.phoenix.be.run(:com.google.android.gms.policy_maps_core_dynamite@231710105@231710102065.533527097.533527097:2)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:226)
at android.os.Looper.loop(Looper.java:313)
at android.app.ActivityThread.main(ActivityThread.java:8757)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:571)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1067)
AND
Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.graphics.Bitmap.isMutable()' on a null object reference
at android.graphics.Canvas.<init>(Canvas.java:113)
at com.google.maps.api.android.lib6.impl.a.a(:com.google.android.gms.policy_maps_core_dynamite@231112107@231112103065.517507265.517507265:1)
at com.google.maps.api.android.lib6.phoenix.be.run(:com.google.android.gms.policy_maps_core_dynamite@231112107@231112103065.517507265.517507265:2)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7884)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)
Description
Version used: androidx.wear.compose:compose-material3:1.0.0-alpha30
Devices/Android versions reproduced on: Android 14.0 x86-64 Emulator
If this is a bug in the library, we would appreciate if you could attach:
### 1. This issue is occurred since latest version(1.0.0-alpha30) only
| version | issue |
|:--|:--|
| 1.0.0-alpha30 | O |
| 1.0.0-alpha29 | X |
### 2. This is only occurred with combination with NavHost and TLC.
> I couldn't find how this interacts to cause the issue. But if I change TLC to LC or SLC the problem doesn't occurred.
### Attached files
Here is a sample project and videos.
attached #1 sample project.
attached #2 video with no problem (use 1.0.0-alpha29)
attached #3 video with problem (use 1.0.0-alpha30)
### Sample Code for reproduce
```
@Composable
fun ReproduceIssue() {
MaterialTheme {
ScreenScaffold {
val navController = rememberNavController()
NavHost(
navController = navController,
startDestination = "first"
) {
composable("first") {
TransformingLazyColumn {
item {
Button(onClick = {
navController.navigate("second")
}) {
Text("Next")
}
}
}
}
composable("second") {
AppScaffold {
val pagerState = rememberPagerState(pageCount = { 10 })
HorizontalPagerScaffold(pagerState = pagerState) { page ->
ScreenScaffold {
Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
Text("Page $page")
}
}
}
}
}
}
}
}
}
```